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Italy · Comune

Drinking water in Velletri

14 supply zones, published by ACEA ATO 2 S.p.A.. The values come from the publications of the Italian water suppliers (gestori), which D.Lgs. 18/2023 requires of them from 12 January 2026. Italian parametric values apply: trihalomethanes 30 instead of 50 µg/l, chromium 25 µg/l, uranium 30 instead of 10 µg/l; for hardness there is no maximum value, it is given in French degrees (°F).

Comune di Velletri - Zona 7 167

ACEA ATO 2 S.p.A.
Water hardness
0.2 °dH
Key values Comune di Velletri - Zona 7 167
Parameter Value Parametric value Share of the parametric value Reference
Sum of PFAS <0,10 µg/L
below limit of quantification
 0.1 µg/l
< 100 % *
Median
Nitrate 3,85 mg/L NO3 50 mg/l
8 %
Median
Lead <0,2 µg/L Pb
below limit of quantification
 10 µg/l — Median
Escherichia coli (E. coli) Conforme MPN/100 mL 0/100 ml — Median
Sulphate 0,5 mg/L SO4 250 mg/l
0.2 %
Median
Sodium 6,5 mg/L Na 200 mg/l
3 %
Median

* Value below the limit of quantification: the actual share of the parametric value is not known; it lies somewhere below the stated upper bound. The marker shows where the limit of quantification of the measurement lies relative to the parametric value.

Show all recorded parameters (61 — most recent value per parameter)

Microbiology (2)

Microbiology – Comune di Velletri - Zona 7 167
Parameter Value Parametric value Share of the parametric value Reference
Escherichia coli (E. coli) Conforme MPN/100 mL 0/100 ml — Median
Intestinal enterococci Conforme N/100 mL 0/100 ml — Median

Chemical parameters (28)

Chemical parameters – Comune di Velletri - Zona 7 167
Parameter Value Parametric value Share of the parametric value Reference
1,2-dichloroethane <0,1 µg/L
below limit of quantification
 3 µg/l
< 3 % *
Median
Acrylamide <0,03 µg/L
below limit of quantification
 0.1 µg/l
< 30 % *
Median
Antimony <1,0 µg/L Sb
below limit of quantification
 10 µg/l — Median
Arsenic 2,75 µg/L As 10 µg/l
27 %
Median
Bisphenol A <0,25 µg/L
below limit of quantification
 2.5 µg/l
< 10 % *
Median
Boron 0,120 mg/L B 1.5 mg/l — Median
Cadmium <0,2 µg/L Cd
below limit of quantification
 5 µg/l — Median
Chlorate <0,05 mg/L ClO3
below limit of quantification
 0,25 — bzw. 0,70 bei Desinfektion mit Chlordioxid — Median
Chlorite <0,05 mg/L ClO2
below limit of quantification
 0,25 — bzw. 0,70 bei Desinfektion mit Chlordioxid — Median
Chromium <5,0 µg/L Cr
below limit of quantification
 25 µg/l — Median
Copper <0,001 mg/L Cu
below limit of quantification
 2 mg/l — Median
Cyanide <10 µg/L CN
below limit of quantification
 50 µg/l — Median
Epichlorohydrin <0,05 µg/L
below limit of quantification
 0.1 µg/l
< 50 % *
Median
Fluoride 0,37 mg/L 1.5 mg/l
25 %
Median
Haloacetic acids (HAA) - µg/L
not determined
 60 µg/l — Median
Lead <0,2 µg/L Pb
below limit of quantification
 10 µg/l — Median
Mercury <0,2 µg/L Hg
below limit of quantification
 1 µg/l — Median
Nickel <2,0 µg/L Ni
below limit of quantification
 20 µg/l — Median
Nitrate 3,85 mg/L NO3 50 mg/l
8 %
Median
Nitrite <0,05 mg/L NO2
below limit of quantification
 0.5 mg/l
< 10 % *
Median
Pesticides — Total - µg/L
not determined
 0.5 µg/l — Median
Polycyclic aromatic hydrocarbons - µg/L
not determined
 0.1 µg/l — Median
Selenium <1,0 µg/L Se
below limit of quantification
 20 µg/l — Median
Tetrachloroethene <1,0 µg/L
below limit of quantification
 — — Median
Trichloroethene <1,0 µg/L
below limit of quantification
 — — Median
Trihalomethanes — Total <1,0 µg/L
below limit of quantification
 30 µg/l
< 3 % *
Median
Uranium 5,80 µg/L U 30 µg/l — Median
Vinyl chloride <0,1 µg/L
below limit of quantification
 0.5 µg/l
< 20 % *
Median

* Value below the limit of quantification: the actual share of the parametric value is not known; it lies somewhere below the stated upper bound. The marker shows where the limit of quantification of the measurement lies relative to the parametric value.

PFAS (1)

PFAS – Comune di Velletri - Zona 7 167
Parameter Value Parametric value Share of the parametric value Reference
Sum of PFAS <0,10 µg/L
below limit of quantification
 0.1 µg/l
< 100 % *
Median

* Value below the limit of quantification: the actual share of the parametric value is not known; it lies somewhere below the stated upper bound. The marker shows where the limit of quantification of the measurement lies relative to the parametric value.

Indicator parameters (16)

Indicator parameters – Comune di Velletri - Zona 7 167
Parameter Value Parametric value Share of the parametric value Reference
Aluminium 6,6 µg/L Al 0.2 mg/l — Median
Ammonium <0,1 mg/L NH4
below limit of quantification
 0.5 mg/l
< 20 % *
Median
Chloride 3,5 mg/L Cl 250 mg/l
1 %
Median
Coliform bacteria Conforme MPN/100 mL 0/100 ml — Median
Colour Incolore Scala Pt/C accettabile per i consumatori, senza variazioni anomale — Median
Conductivity (25 °C) 50 µS/cm 2,500 µS/cm — Median
Iron 5,0 µg/L Fe 0.2 mg/l — Median
Manganese <0,2 µg/L Mn
below limit of quantification
 50 µg/l — Median
Odour 0 Diluiz. 25 accettabile per i consumatori, senza variazioni anomale — Median
pH 8,30 pH 6,5–9,5 — Median
Sodium 6,5 mg/L Na 200 mg/l
3 %
Median
Sulphate 0,5 mg/L SO4 250 mg/l
0.2 %
Median
Taste 0 tasso diluz. accettabile per i consumatori, senza variazioni anomale — Median
Temperature 15,0 °C — — Median
Total organic carbon (TOC) #NUM! mg/L C
not determined
 senza variazioni anomale — Median
Turbidity <0,5 NTU
below limit of quantification
 accettabile per i consumatori, senza variazioni anomale — Median

* Value below the limit of quantification: the actual share of the parametric value is not known; it lies somewhere below the stated upper bound. The marker shows where the limit of quantification of the measurement lies relative to the parametric value.

Treatment substances (1)

Treatment substances – Comune di Velletri - Zona 7 167
Parameter Value Parametric value Share of the parametric value Reference
Free chlorine 0,16 mg/L Cl2 — — Median

Further parameters (13)

Further parameters – Comune di Velletri - Zona 7 167
Parameter Value Parametric value Share of the parametric value Reference
Acid capacity to pH 4.3 21 mg/L CaCO3 — — Median
Beryllium <0,2 µg/L Be
below limit of quantification
 — — Median
Bromide <50 µg/L Br
below limit of quantification
 — — Median
Calcium 1,76 mg/L Ca — — Median
Dry residue 48,5 mg/L — — Median
Hydrogen carbonate 26 mg/L HCO3 — — Median
Magnesium 0,20 mg/L Mg — — Median
Phosphate <50 µg/L P2O5
below limit of quantification
 — — Median
Potassium 6,20 mg/L K — — Median
Silicate / silicic acid 25,5 mg/L SiO2 — — Median
Thallium <0,2 µg/L Tl
below limit of quantification
 — — Median
Total hardness 0,4 °F — — Median
Vanadium 39,70 µg/L V 0.14 mg/l — Median

Values taken unchanged from the publications linked below — for each parameter the most recent recorded value. „—" in the parametric value column: no currently valid legal parametric value is stored in our database for this parameter; the parameter register with all parametric values is being expanded continuously.

Source: https://www.aceaato2.a-acqua.it/content/dam/acea-ato2/pdf/it/mappe-qualita/velletri_zona_7_167.pdf · luglio 2026 · luglio 2026 · retrieved on 08/07/2026

ZONA 10 SIMBRIVIO

ACEA ATO 2 S.p.A.
Water hardness
9.6 °dH
Key values ZONA 10 SIMBRIVIO
Parameter Value Parametric value Share of the parametric value Reference
Sum of PFAS <0,10 µg/L
below limit of quantification
 0.1 µg/l
< 100 % *
Median
Nitrate 1,40 mg/L NO3 50 mg/l
3 %
Median
Lead <0,2 µg/L Pb
below limit of quantification
 10 µg/l — Median
Escherichia coli (E. coli) Conforme MPN/100 mL
not detectable
 0/100 ml — Median
Sulphate 2,18 mg/L SO4 250 mg/l
0.9 %
Median
Sodium 2,3 mg/L Na 200 mg/l
1 %
Median

* Value below the limit of quantification: the actual share of the parametric value is not known; it lies somewhere below the stated upper bound. The marker shows where the limit of quantification of the measurement lies relative to the parametric value.

Show all recorded parameters (61 — most recent value per parameter)

Microbiology (2)

Microbiology – ZONA 10 SIMBRIVIO
Parameter Value Parametric value Share of the parametric value Reference
Escherichia coli (E. coli) Conforme MPN/100 mL
not detectable
 0/100 ml — Median
Intestinal enterococci Conforme N/100 mL
not detectable
 0/100 ml — Median

Chemical parameters (28)

Chemical parameters – ZONA 10 SIMBRIVIO
Parameter Value Parametric value Share of the parametric value Reference
1,2-dichloroethane <0,1 µg/L
below limit of quantification
 3 µg/l
< 3 % *
Median
Acrylamide <0,03 µg/L
below limit of quantification
 0.1 µg/l
< 30 % *
Median
Antimony <1,0 µg/L Sb
below limit of quantification
 10 µg/l — Median
Arsenic <1,0 µg/L As
below limit of quantification
 10 µg/l
< 10 % *
Median
Bisphenol A <0,25 µg/L
below limit of quantification
 2.5 µg/l
< 10 % *
Median
Boron <0,02 mg/L B
below limit of quantification
 1.5 mg/l — Median
Cadmium <0,2 µg/L Cd
below limit of quantification
 5 µg/l — Median
Chlorate <0,05 mg/L ClO3
below limit of quantification
 0,25 — bzw. 0,70 bei Desinfektion mit Chlordioxid — Median
Chlorite <0,05 mg/L ClO2
below limit of quantification
 0,25 — bzw. 0,70 bei Desinfektion mit Chlordioxid — Median
Chromium <5,0 µg/L Cr
below limit of quantification
 25 µg/l — Median
Copper <0,001 mg/L Cu
below limit of quantification
 2 mg/l — Median
Cyanide <10 µg/L CN
below limit of quantification
 50 µg/l — Median
Epichlorohydrin <0,05 µg/L
below limit of quantification
 0.1 µg/l
< 50 % *
Median
Fluoride <0,10 mg/L
below limit of quantification
 1.5 mg/l
< 7 % *
Median
Haloacetic acids (HAA) - µg/L
not determined
 60 µg/l — Median
Lead <0,2 µg/L Pb
below limit of quantification
 10 µg/l — Median
Mercury <0,2 µg/L Hg
below limit of quantification
 1 µg/l — Median
Nickel <2,0 µg/L Ni
below limit of quantification
 20 µg/l — Median
Nitrate 1,40 mg/L NO3 50 mg/l
3 %
Median
Nitrite <0,05 mg/L NO2
below limit of quantification
 0.5 mg/l
< 10 % *
Median
Pesticides — Total - µg/L
not determined
 0.5 µg/l — Median
Polycyclic aromatic hydrocarbons - µg/L
not determined
 0.1 µg/l — Median
Selenium <1,0 µg/L Se
below limit of quantification
 20 µg/l — Median
Tetrachloroethene <1,0 µg/L
below limit of quantification
 — — Median
Trichloroethene <1,0 µg/L
below limit of quantification
 — — Median
Trihalomethanes — Total <1,0 µg/L
below limit of quantification
 30 µg/l
< 3 % *
Median
Uranium 1,00 µg/L U 30 µg/l — Median
Vinyl chloride <0,1 µg/L
below limit of quantification
 0.5 µg/l
< 20 % *
Median

* Value below the limit of quantification: the actual share of the parametric value is not known; it lies somewhere below the stated upper bound. The marker shows where the limit of quantification of the measurement lies relative to the parametric value.

PFAS (1)

PFAS – ZONA 10 SIMBRIVIO
Parameter Value Parametric value Share of the parametric value Reference
Sum of PFAS <0,10 µg/L
below limit of quantification
 0.1 µg/l
< 100 % *
Median

* Value below the limit of quantification: the actual share of the parametric value is not known; it lies somewhere below the stated upper bound. The marker shows where the limit of quantification of the measurement lies relative to the parametric value.

Indicator parameters (16)

Indicator parameters – ZONA 10 SIMBRIVIO
Parameter Value Parametric value Share of the parametric value Reference
Aluminium 5,9 µg/L Al 0.2 mg/l — Median
Ammonium <0,1 mg/L NH4
below limit of quantification
 0.5 mg/l
< 20 % *
Median
Chloride 4,2 mg/L Cl 250 mg/l
2 %
Median
Coliform bacteria Conforme MPN/100 mL
not detectable
 0/100 ml — Median
Colour Incolore Scala Pt/C accettabile per i consumatori, senza variazioni anomale — Median
Conductivity (25 °C) 301 µS/cm 2,500 µS/cm — Median
Iron <5,0 µg/L Fe
below limit of quantification
 0.2 mg/l — Median
Manganese <0,2 µg/L Mn
below limit of quantification
 50 µg/l — Median
Odour 0 Diluiz. 25 accettabile per i consumatori, senza variazioni anomale — Median
pH 7,90 pH 6,5–9,5 — Median
Sodium 2,3 mg/L Na 200 mg/l
1 %
Median
Sulphate 2,18 mg/L SO4 250 mg/l
0.9 %
Median
Taste 0 tasso diluz. accettabile per i consumatori, senza variazioni anomale — Median
Temperature 10,0 °C — — Median
Total organic carbon (TOC) 0,58 mg/L C senza variazioni anomale — Median
Turbidity <0,5 NTU
below limit of quantification
 accettabile per i consumatori, senza variazioni anomale — Median

* Value below the limit of quantification: the actual share of the parametric value is not known; it lies somewhere below the stated upper bound. The marker shows where the limit of quantification of the measurement lies relative to the parametric value.

Treatment substances (1)

Treatment substances – ZONA 10 SIMBRIVIO
Parameter Value Parametric value Share of the parametric value Reference
Free chlorine 0,18 mg/L Cl2 — — Median

Further parameters (13)

Further parameters – ZONA 10 SIMBRIVIO
Parameter Value Parametric value Share of the parametric value Reference
Acid capacity to pH 4.3 184 mg/L CaCO3 — — Median
Beryllium <0,2 µg/L Be
below limit of quantification
 — — Median
Bromide <50 µg/L Br
below limit of quantification
 — — Median
Calcium 53,80 mg/L Ca — — Median
Dry residue 231 mg/L — — Median
Hydrogen carbonate 224 mg/L HCO3 — — Median
Magnesium 8,76 mg/L Mg — — Median
Phosphate <50 µg/L P2O5
below limit of quantification
 — — Median
Potassium 0,58 mg/L K — — Median
Silicate / silicic acid 2,3 mg/L SiO2 — — Median
Thallium <0,2 µg/L Tl
below limit of quantification
 — — Median
Total hardness 17,2 °F — — Median
Vanadium 1,00 µg/L V 0.14 mg/l — Median

Values taken unchanged from the publications linked below — for each parameter the most recent recorded value. „—" in the parametric value column: no currently valid legal parametric value is stored in our database for this parameter; the parameter register with all parametric values is being expanded continuously.

Source: https://www.aceaato2.a-acqua.it/content/dam/acea-ato2/pdf/it/mappe-qualita/velletri_zona_10_simbrivio.pdf · luglio 2026 · luglio 2026 · retrieved on 08/07/2026

Zona 11 Vascucce

ACEA ATO 2 S.p.A.
Water hardness
5 °dH
Key values Zona 11 Vascucce
Parameter Value Parametric value Share of the parametric value Reference
Sum of PFAS <0,10 µg/L
below limit of quantification
 0.1 µg/l
< 100 % *
Median
Nitrate 24,40 mg/L NO3 50 mg/l
49 %
Median
Lead <0,2 µg/L Pb
below limit of quantification
 10 µg/l — Median
Escherichia coli (E. coli) Conforme MPN/100 mL 0/100 ml — Median
Sulphate 12,3 mg/L SO4 250 mg/l
5 %
Median
Sodium 26,6 mg/L Na 200 mg/l
13 %
Median

* Value below the limit of quantification: the actual share of the parametric value is not known; it lies somewhere below the stated upper bound. The marker shows where the limit of quantification of the measurement lies relative to the parametric value.

Show all recorded parameters (61 — most recent value per parameter)

Microbiology (2)

Microbiology – Zona 11 Vascucce
Parameter Value Parametric value Share of the parametric value Reference
Escherichia coli (E. coli) Conforme MPN/100 mL 0/100 ml — Median
Intestinal enterococci Conforme N/100 mL 0/100 ml — Median

Chemical parameters (28)

Chemical parameters – Zona 11 Vascucce
Parameter Value Parametric value Share of the parametric value Reference
1,2-dichloroethane <0,1 µg/L
below limit of quantification
 3 µg/l
< 3 % *
Median
Acrylamide <0,03 µg/L
below limit of quantification
 0.1 µg/l
< 30 % *
Median
Antimony <1,0 µg/L Sb
below limit of quantification
 10 µg/l — Median
Arsenic 6,00 µg/L As 10 µg/l
60 %
Median
Bisphenol A <0,25 µg/L
below limit of quantification
 2.5 µg/l
< 10 % *
Median
Boron 0,156 mg/L B 1.5 mg/l — Median
Cadmium <0,2 µg/L Cd
below limit of quantification
 5 µg/l — Median
Chlorate <0,05 mg/L ClO3
below limit of quantification
 0,25 — bzw. 0,70 bei Desinfektion mit Chlordioxid — Median
Chlorite <0,05 mg/L ClO2
below limit of quantification
 0,25 — bzw. 0,70 bei Desinfektion mit Chlordioxid — Median
Chromium <5,0 µg/L Cr
below limit of quantification
 25 µg/l — Median
Copper <0,001 mg/L Cu
below limit of quantification
 2 mg/l — Median
Cyanide <10 µg/L CN
below limit of quantification
 50 µg/l — Median
Epichlorohydrin <0,05 µg/L
below limit of quantification
 0.1 µg/l
< 50 % *
Median
Fluoride 0,73 mg/L 1.5 mg/l
49 %
Median
Haloacetic acids (HAA) - µg/L
not determined
 60 µg/l — Median
Lead <0,2 µg/L Pb
below limit of quantification
 10 µg/l — Median
Mercury <0,2 µg/L Hg
below limit of quantification
 1 µg/l — Median
Nickel <2,0 µg/L Ni
below limit of quantification
 20 µg/l — Median
Nitrate 24,40 mg/L NO3 50 mg/l
49 %
Median
Nitrite <0,05 mg/L NO2
below limit of quantification
 0.5 mg/l
< 10 % *
Median
Pesticides — Total - µg/L
not determined
 0.5 µg/l — Median
Polycyclic aromatic hydrocarbons - µg/L
not determined
 0.1 µg/l — Median
Selenium <1,0 µg/L Se
below limit of quantification
 20 µg/l — Median
Tetrachloroethene <1,0 µg/L
below limit of quantification
 — — Median
Trichloroethene <1,0 µg/L
below limit of quantification
 — — Median
Trihalomethanes — Total <1,0 µg/L
below limit of quantification
 30 µg/l
< 3 % *
Median
Uranium 3,95 µg/L U 30 µg/l — Median
Vinyl chloride <0,1 µg/L
below limit of quantification
 0.5 µg/l
< 20 % *
Median

* Value below the limit of quantification: the actual share of the parametric value is not known; it lies somewhere below the stated upper bound. The marker shows where the limit of quantification of the measurement lies relative to the parametric value.

PFAS (1)

PFAS – Zona 11 Vascucce
Parameter Value Parametric value Share of the parametric value Reference
Sum of PFAS <0,10 µg/L
below limit of quantification
 0.1 µg/l
< 100 % *
Median

* Value below the limit of quantification: the actual share of the parametric value is not known; it lies somewhere below the stated upper bound. The marker shows where the limit of quantification of the measurement lies relative to the parametric value.

Indicator parameters (16)

Indicator parameters – Zona 11 Vascucce
Parameter Value Parametric value Share of the parametric value Reference
Aluminium 4,8 µg/L Al 0.2 mg/l — Median
Ammonium <0,1 mg/L NH4
below limit of quantification
 0.5 mg/l
< 20 % *
Median
Chloride 21,9 mg/L Cl 250 mg/l
9 %
Median
Coliform bacteria Conforme MPN/100 mL 0/100 ml — Median
Colour Incolore Scala Pt/C accettabile per i consumatori, senza variazioni anomale — Median
Conductivity (25 °C) 347 µS/cm 2,500 µS/cm — Median
Iron 5,0 µg/L Fe 0.2 mg/l — Median
Manganese 0,20 µg/L Mn 50 µg/l — Median
Odour 0 Diluiz. 25 accettabile per i consumatori, senza variazioni anomale — Median
pH 7,40 pH 6,5–9,5 — Median
Sodium 26,6 mg/L Na 200 mg/l
13 %
Median
Sulphate 12,3 mg/L SO4 250 mg/l
5 %
Median
Taste 0 tasso diluz. accettabile per i consumatori, senza variazioni anomale — Median
Temperature 13,0 °C — — Median
Total organic carbon (TOC) 0,43 mg/L C senza variazioni anomale — Median
Turbidity <0,5 NTU
below limit of quantification
 accettabile per i consumatori, senza variazioni anomale — Median

* Value below the limit of quantification: the actual share of the parametric value is not known; it lies somewhere below the stated upper bound. The marker shows where the limit of quantification of the measurement lies relative to the parametric value.

Treatment substances (1)

Treatment substances – Zona 11 Vascucce
Parameter Value Parametric value Share of the parametric value Reference
Free chlorine 0,16 mg/L Cl2 — — Median

Further parameters (13)

Further parameters – Zona 11 Vascucce
Parameter Value Parametric value Share of the parametric value Reference
Acid capacity to pH 4.3 124 mg/L CaCO3 — — Median
Beryllium <0,2 µg/L Be
below limit of quantification
 — — Median
Bromide <50 µg/L Br
below limit of quantification
 — — Median
Calcium 22,90 mg/L Ca — — Median
Dry residue 248 mg/L — — Median
Hydrogen carbonate 151 mg/L HCO3 — — Median
Magnesium 7,58 mg/L Mg — — Median
Phosphate <50 µg/L P2O5
below limit of quantification
 — — Median
Potassium 28,10 mg/L K — — Median
Silicate / silicic acid 26,1 mg/L SiO2 — — Median
Thallium <0,2 µg/L Tl
below limit of quantification
 — — Median
Total hardness 8,9 °F — — Median
Vanadium 21,60 µg/L V 0.14 mg/l — Median

Values taken unchanged from the publications linked below — for each parameter the most recent recorded value. „—" in the parametric value column: no currently valid legal parametric value is stored in our database for this parameter; the parameter register with all parametric values is being expanded continuously.

Source: https://www.aceaato2.a-acqua.it/content/dam/acea-ato2/pdf/it/mappe-qualita/velletri_zona_11_vascucce.pdf · luglio 2026 · luglio 2026 · retrieved on 08/07/2026

Zona 12 San Pietro

ACEA ATO 2 S.p.A.
Water hardness
4.4 °dH
Key values Zona 12 San Pietro
Parameter Value Parametric value Share of the parametric value Reference
Sum of PFAS <0,10 µg/L
below limit of quantification
 0.1 µg/l
< 100 % *
Median
Nitrate 19,30 mg/L NO3 50 mg/l
39 %
Median
Lead <0,2 µg/L Pb
below limit of quantification
 10 µg/l — Median
Escherichia coli (E. coli) Conforme MPN/100 mL 0/100 ml — Median
Sulphate 10 mg/L SO4 250 mg/l
4 %
Median
Sodium 23,7 mg/L Na 200 mg/l
12 %
Median

* Value below the limit of quantification: the actual share of the parametric value is not known; it lies somewhere below the stated upper bound. The marker shows where the limit of quantification of the measurement lies relative to the parametric value.

Show all recorded parameters (61 — most recent value per parameter)

Microbiology (2)

Microbiology – Zona 12 San Pietro
Parameter Value Parametric value Share of the parametric value Reference
Escherichia coli (E. coli) Conforme MPN/100 mL 0/100 ml — Median
Intestinal enterococci Conforme N/100 mL 0/100 ml — Median

Chemical parameters (28)

Chemical parameters – Zona 12 San Pietro
Parameter Value Parametric value Share of the parametric value Reference
1,2-dichloroethane <0,1 µg/L
below limit of quantification
 3 µg/l
< 3 % *
Median
Acrylamide <0,03 µg/L
below limit of quantification
 0.1 µg/l
< 30 % *
Median
Antimony <1,0 µg/L Sb
below limit of quantification
 10 µg/l — Median
Arsenic 7,20 µg/L As 10 µg/l
72 %
Median
Bisphenol A <0,25 µg/L
below limit of quantification
 2.5 µg/l
< 10 % *
Median
Boron 0,065 mg/L B 1.5 mg/l — Median
Cadmium <0,2 µg/L Cd
below limit of quantification
 5 µg/l — Median
Chlorate <0,05 mg/L ClO3
below limit of quantification
 0,25 — bzw. 0,70 bei Desinfektion mit Chlordioxid — Median
Chlorite <0,05 mg/L ClO2
below limit of quantification
 0,25 — bzw. 0,70 bei Desinfektion mit Chlordioxid — Median
Chromium <5,0 µg/L Cr
below limit of quantification
 25 µg/l — Median
Copper <0,001 mg/L Cu
below limit of quantification
 2 mg/l — Median
Cyanide <10 µg/L CN
below limit of quantification
 50 µg/l — Median
Epichlorohydrin <0,05 µg/L
below limit of quantification
 0.1 µg/l
< 50 % *
Median
Fluoride 0,48 mg/L 1.5 mg/l
32 %
Median
Haloacetic acids (HAA) - µg/L
not determined
 60 µg/l — Median
Lead <0,2 µg/L Pb
below limit of quantification
 10 µg/l — Median
Mercury <0,2 µg/L Hg
below limit of quantification
 1 µg/l — Median
Nickel <2,0 µg/L Ni
below limit of quantification
 20 µg/l — Median
Nitrate 19,30 mg/L NO3 50 mg/l
39 %
Median
Nitrite <0,05 mg/L NO2
below limit of quantification
 0.5 mg/l
< 10 % *
Median
Pesticides — Total - µg/L
not determined
 0.5 µg/l — Median
Polycyclic aromatic hydrocarbons - µg/L
not determined
 0.1 µg/l — Median
Selenium <1,0 µg/L Se
below limit of quantification
 20 µg/l — Median
Tetrachloroethene <1,0 µg/L
below limit of quantification
 — — Median
Trichloroethene <1,0 µg/L
below limit of quantification
 — — Median
Trihalomethanes — Total <1,0 µg/L
below limit of quantification
 30 µg/l
< 3 % *
Median
Uranium 3,40 µg/L U 30 µg/l — Median
Vinyl chloride <0,1 µg/L
below limit of quantification
 0.5 µg/l
< 20 % *
Median

* Value below the limit of quantification: the actual share of the parametric value is not known; it lies somewhere below the stated upper bound. The marker shows where the limit of quantification of the measurement lies relative to the parametric value.

PFAS (1)

PFAS – Zona 12 San Pietro
Parameter Value Parametric value Share of the parametric value Reference
Sum of PFAS <0,10 µg/L
below limit of quantification
 0.1 µg/l
< 100 % *
Median

* Value below the limit of quantification: the actual share of the parametric value is not known; it lies somewhere below the stated upper bound. The marker shows where the limit of quantification of the measurement lies relative to the parametric value.

Indicator parameters (16)

Indicator parameters – Zona 12 San Pietro
Parameter Value Parametric value Share of the parametric value Reference
Aluminium 2,1 µg/L Al 0.2 mg/l — Median
Ammonium <0,1 mg/L NH4
below limit of quantification
 0.5 mg/l
< 20 % *
Median
Chloride 19,6 mg/L Cl 250 mg/l
8 %
Median
Coliform bacteria Conforme MPN/100 mL 0/100 ml — Median
Colour Incolore Scala Pt/C accettabile per i consumatori, senza variazioni anomale — Median
Conductivity (25 °C) 310 µS/cm 2,500 µS/cm — Median
Iron 5,0 µg/L Fe 0.2 mg/l — Median
Manganese 0,20 µg/L Mn 50 µg/l — Median
Odour 0 Diluiz. 25 accettabile per i consumatori, senza variazioni anomale — Median
pH 8,10 pH 6,5–9,5 — Median
Sodium 23,7 mg/L Na 200 mg/l
12 %
Median
Sulphate 10 mg/L SO4 250 mg/l
4 %
Median
Taste 0 tasso diluz. accettabile per i consumatori, senza variazioni anomale — Median
Temperature 15,0 °C — — Median
Total organic carbon (TOC) 0,34 mg/L C senza variazioni anomale — Median
Turbidity <0,5 NTU
below limit of quantification
 accettabile per i consumatori, senza variazioni anomale — Median

* Value below the limit of quantification: the actual share of the parametric value is not known; it lies somewhere below the stated upper bound. The marker shows where the limit of quantification of the measurement lies relative to the parametric value.

Treatment substances (1)

Treatment substances – Zona 12 San Pietro
Parameter Value Parametric value Share of the parametric value Reference
Free chlorine 0,17 mg/L Cl2 — — Median

Further parameters (13)

Further parameters – Zona 12 San Pietro
Parameter Value Parametric value Share of the parametric value Reference
Acid capacity to pH 4.3 129 mg/L CaCO3 — — Median
Beryllium <0,2 µg/L Be
below limit of quantification
 — — Median
Bromide 50 µg/L Br — — Median
Calcium 20,80 mg/L Ca — — Median
Dry residue 238 mg/L — — Median
Hydrogen carbonate 157 mg/L HCO3 — — Median
Magnesium 6,68 mg/L Mg — — Median
Phosphate <50 µg/L P2O5
below limit of quantification
 — — Median
Potassium 24,80 mg/L K — — Median
Silicate / silicic acid 33,1 mg/L SiO2 — — Median
Thallium <0,2 µg/L Tl
below limit of quantification
 — — Median
Total hardness 7,9 °F — — Median
Vanadium 14,30 µg/L V 0.14 mg/l — Median

Values taken unchanged from the publications linked below — for each parameter the most recent recorded value. „—" in the parametric value column: no currently valid legal parametric value is stored in our database for this parameter; the parameter register with all parametric values is being expanded continuously.

Source: https://www.aceaato2.a-acqua.it/content/dam/acea-ato2/pdf/it/mappe-qualita/velletri_zona_12_san_pietro.pdf · luglio 2026 · luglio 2026 · retrieved on 08/07/2026

Zona 13 Acqua Palomba

ACEA ATO 2 S.p.A.
Key values Zona 13 Acqua Palomba
Parameter Value Parametric value Share of the parametric value Reference
Sum of PFAS <0,10 µg/L
below limit of quantification
 0.1 µg/l
< 100 % *
Median
Nitrate 2,48 mg/L NO3 50 mg/l
5 %
Median
Lead <0,2 µg/L Pb
below limit of quantification
 10 µg/l — Median
Escherichia coli (E. coli) Conforme MPN/100 mL 0/100 ml — Median
Sulphate 2,92 mg/L SO4 250 mg/l
1 %
Median
Sodium 5,7 mg/L Na 200 mg/l
3 %
Median

* Value below the limit of quantification: the actual share of the parametric value is not known; it lies somewhere below the stated upper bound. The marker shows where the limit of quantification of the measurement lies relative to the parametric value.

Show all recorded parameters (60 — most recent value per parameter)

Microbiology (2)

Microbiology – Zona 13 Acqua Palomba
Parameter Value Parametric value Share of the parametric value Reference
Escherichia coli (E. coli) Conforme MPN/100 mL 0/100 ml — Median
Intestinal enterococci Conforme N/100 mL 0/100 ml — Median

Chemical parameters (28)

Chemical parameters – Zona 13 Acqua Palomba
Parameter Value Parametric value Share of the parametric value Reference
1,2-dichloroethane <0,1 µg/L
below limit of quantification
 3 µg/l
< 3 % *
Median
Acrylamide <0,03 µg/L
below limit of quantification
 0.1 µg/l
< 30 % *
Median
Antimony <1,0 µg/L Sb
below limit of quantification
 10 µg/l — Median
Arsenic 1,25 µg/L As 10 µg/l
13 %
Median
Bisphenol A <0,25 µg/L
below limit of quantification
 2.5 µg/l
< 10 % *
Median
Boron 0,031 mg/L B 1.5 mg/l — Median
Cadmium <0,2 µg/L Cd
below limit of quantification
 5 µg/l — Median
Chlorate <0,05 mg/L ClO3
below limit of quantification
 0,25 — bzw. 0,70 bei Desinfektion mit Chlordioxid — Median
Chlorite <0,05 mg/L ClO2
below limit of quantification
 0,25 — bzw. 0,70 bei Desinfektion mit Chlordioxid — Median
Chromium <5,0 µg/L Cr
below limit of quantification
 25 µg/l — Median
Copper <0,001 mg/L Cu
below limit of quantification
 2 mg/l — Median
Cyanide <10 µg/L CN
below limit of quantification
 50 µg/l — Median
Epichlorohydrin <0,05 µg/L
below limit of quantification
 0.1 µg/l
< 50 % *
Median
Fluoride 0,17 mg/L 1.5 mg/l
11 %
Median
Haloacetic acids (HAA) - µg/L
not determined
 60 µg/l — Median
Lead <0,2 µg/L Pb
below limit of quantification
 10 µg/l — Median
Mercury <0,2 µg/L Hg
below limit of quantification
 1 µg/l — Median
Nickel <2,0 µg/L Ni
below limit of quantification
 20 µg/l — Median
Nitrate 2,48 mg/L NO3 50 mg/l
5 %
Median
Nitrite <0,05 mg/L NO2
below limit of quantification
 0.5 mg/l
< 10 % *
Median
Pesticides — Total - µg/L
not determined
 0.5 µg/l — Median
Polycyclic aromatic hydrocarbons - µg/L
not determined
 0.1 µg/l — Median
Selenium <1,0 µg/L Se
below limit of quantification
 20 µg/l — Median
Tetrachloroethene <1,0 µg/L
below limit of quantification
 — — Median
Trichloroethene <1,0 µg/L
below limit of quantification
 — — Median
Trihalomethanes — Total <1,0 µg/L
below limit of quantification
 30 µg/l
< 3 % *
Median
Uranium 1,64 µg/L U 30 µg/l — Median
Vinyl chloride <0,1 µg/L
below limit of quantification
 0.5 µg/l
< 20 % *
Median

* Value below the limit of quantification: the actual share of the parametric value is not known; it lies somewhere below the stated upper bound. The marker shows where the limit of quantification of the measurement lies relative to the parametric value.

PFAS (1)

PFAS – Zona 13 Acqua Palomba
Parameter Value Parametric value Share of the parametric value Reference
Sum of PFAS <0,10 µg/L
below limit of quantification
 0.1 µg/l
< 100 % *
Median

* Value below the limit of quantification: the actual share of the parametric value is not known; it lies somewhere below the stated upper bound. The marker shows where the limit of quantification of the measurement lies relative to the parametric value.

Indicator parameters (16)

Indicator parameters – Zona 13 Acqua Palomba
Parameter Value Parametric value Share of the parametric value Reference
Aluminium 4,4 µg/L Al 0.2 mg/l — Median
Ammonium <0,1 mg/L NH4
below limit of quantification
 0.5 mg/l
< 20 % *
Median
Chloride 6,9 mg/L Cl 250 mg/l
3 %
Median
Coliform bacteria Conforme MPN/100 mL 0/100 ml — Median
Colour Incolore Scala Pt/C accettabile per i consumatori, senza variazioni anomale — Median
Conductivity (25 °C) 289 µS/cm 2,500 µS/cm — Median
Iron 10,3 µg/L Fe 0.2 mg/l — Median
Manganese <0,2 µg/L Mn
below limit of quantification
 50 µg/l — Median
Odour 0 Diluiz. 25 accettabile per i consumatori, senza variazioni anomale — Median
pH 7,95 pH 6,5–9,5 — Median
Sodium 5,7 mg/L Na 200 mg/l
3 %
Median
Sulphate 2,92 mg/L SO4 250 mg/l
1 %
Median
Taste 0 tasso diluz. accettabile per i consumatori, senza variazioni anomale — Median
Temperature 13,5 °C — — Median
Total organic carbon (TOC) 0,33 mg/L C senza variazioni anomale — Median
Turbidity <0,5 NTU
below limit of quantification
 accettabile per i consumatori, senza variazioni anomale — Median

* Value below the limit of quantification: the actual share of the parametric value is not known; it lies somewhere below the stated upper bound. The marker shows where the limit of quantification of the measurement lies relative to the parametric value.

Treatment substances (1)

Treatment substances – Zona 13 Acqua Palomba
Parameter Value Parametric value Share of the parametric value Reference
Free chlorine 0,19 mg/L Cl2 — — Median

Further parameters (12)

Further parameters – Zona 13 Acqua Palomba
Parameter Value Parametric value Share of the parametric value Reference
Acid capacity to pH 4.3 167 mg/L CaCO3 — — Median
Beryllium <0,2 µg/L Be
below limit of quantification
 — — Median
Bromide <50 µg/L Br
below limit of quantification
 — — Median
Calcium 42,70 mg/L Ca — — Median
Dry residue 222 mg/L — — Median
Hydrogen carbonate 204 mg/L HCO3 — — Median
Magnesium 7,93 mg/L Mg — — Median
Phosphate <50 µg/L P2O5
below limit of quantification
 — — Median
Potassium 4,71 mg/L K — — Median
Silicate / silicic acid 38,1 mg/L SiO2 — — Median
Thallium <0,2 µg/L Tl
below limit of quantification
 — — Median
Vanadium 17,45 µg/L V 0.14 mg/l — Median

Values taken unchanged from the publications linked below — for each parameter the most recent recorded value. „—" in the parametric value column: no currently valid legal parametric value is stored in our database for this parameter; the parameter register with all parametric values is being expanded continuously.

Source: https://www.aceaato2.a-acqua.it/content/dam/acea-ato2/pdf/it/mappe-qualita/velletri_zona_13_acqua_palomba.pdf · luglio 2026 · luglio 2026 · retrieved on 08/07/2026

ZONA 14 CALVARIONE

ACEA ATO 2 S.p.A.
Water hardness
21.1 °dH
Key values ZONA 14 CALVARIONE
Parameter Value Parametric value Share of the parametric value Reference
Sum of PFAS <0,10 µg/L
below limit of quantification
 0.1 µg/l
< 100 % *
Median
Nitrate 13,90 mg/L NO3 50 mg/l
28 %
Median
Lead <0,2 µg/L Pb
below limit of quantification
 10 µg/l — Median
Escherichia coli (E. coli) Conforme MPN/100 mL 0/100 ml — Median
Sulphate 3,29 mg/L SO4 250 mg/l
1 %
Median
Sodium 38,2 mg/L Na 200 mg/l
19 %
Median

* Value below the limit of quantification: the actual share of the parametric value is not known; it lies somewhere below the stated upper bound. The marker shows where the limit of quantification of the measurement lies relative to the parametric value.

Show all recorded parameters (61 — most recent value per parameter)

Microbiology (2)

Microbiology – ZONA 14 CALVARIONE
Parameter Value Parametric value Share of the parametric value Reference
Escherichia coli (E. coli) Conforme MPN/100 mL 0/100 ml — Median
Intestinal enterococci Conforme N/100 mL 0/100 ml — Median

Chemical parameters (28)

Chemical parameters – ZONA 14 CALVARIONE
Parameter Value Parametric value Share of the parametric value Reference
1,2-dichloroethane <0,1 µg/L
below limit of quantification
 3 µg/l
< 3 % *
Median
Acrylamide <0,03 µg/L
below limit of quantification
 0.1 µg/l
< 30 % *
Median
Antimony <1,0 µg/L Sb
below limit of quantification
 10 µg/l — Median
Arsenic 3,90 µg/L As 10 µg/l
39 %
Median
Bisphenol A <0,25 µg/L
below limit of quantification
 2.5 µg/l
< 10 % *
Median
Boron 0,079 mg/L B 1.5 mg/l — Median
Cadmium <0,2 µg/L Cd
below limit of quantification
 5 µg/l — Median
Chlorate <0,05 mg/L ClO3
below limit of quantification
 0,25 — bzw. 0,70 bei Desinfektion mit Chlordioxid — Median
Chlorite <0,05 mg/L ClO2
below limit of quantification
 0,25 — bzw. 0,70 bei Desinfektion mit Chlordioxid — Median
Chromium <5,0 µg/L Cr
below limit of quantification
 25 µg/l — Median
Copper 0,002 mg/L Cu 2 mg/l — Median
Cyanide <10 µg/L CN
below limit of quantification
 50 µg/l — Median
Epichlorohydrin <0,05 µg/L
below limit of quantification
 0.1 µg/l
< 50 % *
Median
Fluoride 0,23 mg/L 1.5 mg/l
15 %
Median
Haloacetic acids (HAA) - µg/L
not determined
 60 µg/l — Median
Lead <0,2 µg/L Pb
below limit of quantification
 10 µg/l — Median
Mercury <0,2 µg/L Hg
below limit of quantification
 1 µg/l — Median
Nickel <2,0 µg/L Ni
below limit of quantification
 20 µg/l — Median
Nitrate 13,90 mg/L NO3 50 mg/l
28 %
Median
Nitrite <0,05 mg/L NO2
below limit of quantification
 0.5 mg/l
< 10 % *
Median
Pesticides — Total - µg/L
not determined
 0.5 µg/l — Median
Polycyclic aromatic hydrocarbons - µg/L
not determined
 0.1 µg/l — Median
Selenium <1,0 µg/L Se
below limit of quantification
 20 µg/l — Median
Tetrachloroethene <1,0 µg/L
below limit of quantification
 — — Median
Trichloroethene <1,0 µg/L
below limit of quantification
 — — Median
Trihalomethanes — Total <1,0 µg/L
below limit of quantification
 30 µg/l
< 3 % *
Median
Uranium 12,20 µg/L U 30 µg/l — Median
Vinyl chloride <0,1 µg/L
below limit of quantification
 0.5 µg/l
< 20 % *
Median

* Value below the limit of quantification: the actual share of the parametric value is not known; it lies somewhere below the stated upper bound. The marker shows where the limit of quantification of the measurement lies relative to the parametric value.

PFAS (1)

PFAS – ZONA 14 CALVARIONE
Parameter Value Parametric value Share of the parametric value Reference
Sum of PFAS <0,10 µg/L
below limit of quantification
 0.1 µg/l
< 100 % *
Median

* Value below the limit of quantification: the actual share of the parametric value is not known; it lies somewhere below the stated upper bound. The marker shows where the limit of quantification of the measurement lies relative to the parametric value.

Indicator parameters (16)

Indicator parameters – ZONA 14 CALVARIONE
Parameter Value Parametric value Share of the parametric value Reference
Aluminium 8,2 µg/L Al 0.2 mg/l — Median
Ammonium <0,1 mg/L NH4
below limit of quantification
 0.5 mg/l
< 20 % *
Median
Chloride 13,3 mg/L Cl 250 mg/l
5 %
Median
Coliform bacteria Conforme MPN/100 mL 0/100 ml — Median
Colour Incolore Scala Pt/C accettabile per i consumatori, senza variazioni anomale — Median
Conductivity (25 °C) 893 µS/cm 2,500 µS/cm — Median
Iron 18,0 µg/L Fe 0.2 mg/l — Median
Manganese 0,40 µg/L Mn 50 µg/l — Median
Odour 0 Diluiz. 25 accettabile per i consumatori, senza variazioni anomale — Median
pH 6,70 pH 6,5–9,5 — Median
Sodium 38,2 mg/L Na 200 mg/l
19 %
Median
Sulphate 3,29 mg/L SO4 250 mg/l
1 %
Median
Taste 0 tasso diluz. accettabile per i consumatori, senza variazioni anomale — Median
Temperature 10,5 °C — — Median
Total organic carbon (TOC) 0,54 mg/L C senza variazioni anomale — Median
Turbidity <0,5 NTU
below limit of quantification
 accettabile per i consumatori, senza variazioni anomale — Median

* Value below the limit of quantification: the actual share of the parametric value is not known; it lies somewhere below the stated upper bound. The marker shows where the limit of quantification of the measurement lies relative to the parametric value.

Treatment substances (1)

Treatment substances – ZONA 14 CALVARIONE
Parameter Value Parametric value Share of the parametric value Reference
Free chlorine 0,11 mg/L Cl2 — — Median

Further parameters (13)

Further parameters – ZONA 14 CALVARIONE
Parameter Value Parametric value Share of the parametric value Reference
Acid capacity to pH 4.3 519 mg/L CaCO3 — — Median
Beryllium 0,37 µg/L Be — — Median
Bromide <50 µg/L Br
below limit of quantification
 — — Median
Calcium 96,10 mg/L Ca — — Median
Dry residue 677 mg/L — — Median
Hydrogen carbonate 633 mg/L HCO3 — — Median
Magnesium 33,00 mg/L Mg — — Median
Phosphate 268 µg/L P2O5 — — Median
Potassium 69,10 mg/L K — — Median
Silicate / silicic acid 57,4 mg/L SiO2 — — Median
Thallium <0,2 µg/L Tl
below limit of quantification
 — — Median
Total hardness 37,6 °F — — Median
Vanadium 24,49 µg/L V 0.14 mg/l — Median

Values taken unchanged from the publications linked below — for each parameter the most recent recorded value. „—" in the parametric value column: no currently valid legal parametric value is stored in our database for this parameter; the parameter register with all parametric values is being expanded continuously.

Source: https://www.aceaato2.a-acqua.it/content/dam/acea-ato2/pdf/it/mappe-qualita/velletri_zona_14_calvarione.pdf · luglio 2026 · luglio 2026 · retrieved on 08/07/2026

Zona 1 Villa delle Querce

ACEA ATO 2 S.p.A.
Water hardness
18.2 °dH
Key values Zona 1 Villa delle Querce
Parameter Value Parametric value Share of the parametric value Reference
Sum of PFAS <0,10 µg/L
below limit of quantification
 0.1 µg/l
< 100 % *
Median
Nitrate 13,70 mg/L NO3 50 mg/l
27 %
Median
Lead <0,2 µg/L Pb
below limit of quantification
 10 µg/l — Median
Escherichia coli (E. coli) Conforme MPN/100 mL 0/100 ml — Median
Sulphate 5,02 mg/L SO4 250 mg/l
2 %
Median
Sodium 35,4 mg/L Na 200 mg/l
18 %
Median

* Value below the limit of quantification: the actual share of the parametric value is not known; it lies somewhere below the stated upper bound. The marker shows where the limit of quantification of the measurement lies relative to the parametric value.

Show all recorded parameters (61 — most recent value per parameter)

Microbiology (2)

Microbiology – Zona 1 Villa delle Querce
Parameter Value Parametric value Share of the parametric value Reference
Escherichia coli (E. coli) Conforme MPN/100 mL 0/100 ml — Median
Intestinal enterococci Conforme N/100 mL 0/100 ml — Median

Chemical parameters (28)

Chemical parameters – Zona 1 Villa delle Querce
Parameter Value Parametric value Share of the parametric value Reference
1,2-dichloroethane <0,1 µg/L
below limit of quantification
 3 µg/l
< 3 % *
Median
Acrylamide <0,03 µg/L
below limit of quantification
 0.1 µg/l
< 30 % *
Median
Antimony <1,0 µg/L Sb
below limit of quantification
 10 µg/l — Median
Arsenic 5,40 µg/L As 10 µg/l
54 %
Median
Bisphenol A <0,25 µg/L
below limit of quantification
 2.5 µg/l
< 10 % *
Median
Boron 0,057 mg/L B 1.5 mg/l — Median
Cadmium <0,2 µg/L Cd
below limit of quantification
 5 µg/l — Median
Chlorate <0,05 mg/L ClO3
below limit of quantification
 0,25 — bzw. 0,70 bei Desinfektion mit Chlordioxid — Median
Chlorite <0,05 mg/L ClO2
below limit of quantification
 0,25 — bzw. 0,70 bei Desinfektion mit Chlordioxid — Median
Chromium <5,0 µg/L Cr
below limit of quantification
 25 µg/l — Median
Copper <0,001 mg/L Cu
below limit of quantification
 2 mg/l — Median
Cyanide <10 µg/L CN
below limit of quantification
 50 µg/l — Median
Epichlorohydrin <0,05 µg/L
below limit of quantification
 0.1 µg/l
< 50 % *
Median
Fluoride 0,28 mg/L 1.5 mg/l
19 %
Median
Haloacetic acids (HAA) - µg/L
not determined
 60 µg/l — Median
Lead <0,2 µg/L Pb
below limit of quantification
 10 µg/l — Median
Mercury <0,2 µg/L Hg
below limit of quantification
 1 µg/l — Median
Nickel <2,0 µg/L Ni
below limit of quantification
 20 µg/l — Median
Nitrate 13,70 mg/L NO3 50 mg/l
27 %
Median
Nitrite <0,05 mg/L NO2
below limit of quantification
 0.5 mg/l
< 10 % *
Median
Pesticides — Total - µg/L
not determined
 0.5 µg/l — Median
Polycyclic aromatic hydrocarbons - µg/L
not determined
 0.1 µg/l — Median
Selenium <1,0 µg/L Se
below limit of quantification
 20 µg/l — Median
Tetrachloroethene <1,0 µg/L
below limit of quantification
 — — Median
Trichloroethene <1,0 µg/L
below limit of quantification
 — — Median
Trihalomethanes — Total <1,0 µg/L
below limit of quantification
 30 µg/l
< 3 % *
Median
Uranium 7,40 µg/L U 30 µg/l — Median
Vinyl chloride <0,1 µg/L
below limit of quantification
 0.5 µg/l
< 20 % *
Median

* Value below the limit of quantification: the actual share of the parametric value is not known; it lies somewhere below the stated upper bound. The marker shows where the limit of quantification of the measurement lies relative to the parametric value.

PFAS (1)

PFAS – Zona 1 Villa delle Querce
Parameter Value Parametric value Share of the parametric value Reference
Sum of PFAS <0,10 µg/L
below limit of quantification
 0.1 µg/l
< 100 % *
Median

* Value below the limit of quantification: the actual share of the parametric value is not known; it lies somewhere below the stated upper bound. The marker shows where the limit of quantification of the measurement lies relative to the parametric value.

Indicator parameters (16)

Indicator parameters – Zona 1 Villa delle Querce
Parameter Value Parametric value Share of the parametric value Reference
Aluminium 2,4 µg/L Al 0.2 mg/l — Median
Ammonium <0,1 mg/L NH4
below limit of quantification
 0.5 mg/l
< 20 % *
Median
Chloride 16,9 mg/L Cl 250 mg/l
7 %
Median
Coliform bacteria Conforme MPN/100 mL 0/100 ml — Median
Colour Incolore Scala Pt/C accettabile per i consumatori, senza variazioni anomale — Median
Conductivity (25 °C) 815 µS/cm 2,500 µS/cm — Median
Iron 5,5 µg/L Fe 0.2 mg/l — Median
Manganese 0,40 µg/L Mn 50 µg/l — Median
Odour 0 Diluiz. 25 accettabile per i consumatori, senza variazioni anomale — Median
pH 7,00 pH 6,5–9,5 — Median
Sodium 35,4 mg/L Na 200 mg/l
18 %
Median
Sulphate 5,02 mg/L SO4 250 mg/l
2 %
Median
Taste 0 tasso diluz. accettabile per i consumatori, senza variazioni anomale — Median
Temperature 9,0 °C — — Median
Total organic carbon (TOC) 0,51 mg/L C senza variazioni anomale — Median
Turbidity 0,50 NTU accettabile per i consumatori, senza variazioni anomale — Median

* Value below the limit of quantification: the actual share of the parametric value is not known; it lies somewhere below the stated upper bound. The marker shows where the limit of quantification of the measurement lies relative to the parametric value.

Treatment substances (1)

Treatment substances – Zona 1 Villa delle Querce
Parameter Value Parametric value Share of the parametric value Reference
Free chlorine 0,22 mg/L Cl2 — — Median

Further parameters (13)

Further parameters – Zona 1 Villa delle Querce
Parameter Value Parametric value Share of the parametric value Reference
Acid capacity to pH 4.3 451 mg/L CaCO3 — — Median
Beryllium <0,2 µg/L Be
below limit of quantification
 — — Median
Bromide <50 µg/L Br
below limit of quantification
 — — Median
Calcium 84,20 mg/L Ca — — Median
Dry residue 583 mg/L — — Median
Hydrogen carbonate 550 mg/L HCO3 — — Median
Magnesium 27,80 mg/L Mg — — Median
Phosphate 180 µg/L P2O5 — — Median
Potassium 61,60 mg/L K — — Median
Silicate / silicic acid 43,1 mg/L SiO2 — — Median
Thallium <0,2 µg/L Tl
below limit of quantification
 — — Median
Total hardness 32,5 °F — — Median
Vanadium 34,60 µg/L V 0.14 mg/l — Median

Values taken unchanged from the publications linked below — for each parameter the most recent recorded value. „—" in the parametric value column: no currently valid legal parametric value is stored in our database for this parameter; the parameter register with all parametric values is being expanded continuously.

Source: https://www.aceaato2.a-acqua.it/content/dam/acea-ato2/pdf/it/mappe-qualita/velletri_zona_1_villa_delle_querce.pdf · luglio 2026 · luglio 2026 · retrieved on 08/07/2026

ZONA 2 MARMI

ACEA ATO 2 S.p.A.
Water hardness
8.6 °dH
Key values ZONA 2 MARMI
Parameter Value Parametric value Share of the parametric value Reference
Sum of PFAS <0,10 µg/L
below limit of quantification
 0.1 µg/l
< 100 % *
Median
Nitrate 3,08 mg/L NO3 50 mg/l
6 %
Median
Lead <0,2 µg/L Pb
below limit of quantification
 10 µg/l — Median
Escherichia coli (E. coli) Conforme MPN/100 mL 0/100 ml — Median
Sulphate 3,08 mg/L SO4 250 mg/l
1 %
Median
Sodium 27,3 mg/L Na 200 mg/l
14 %
Median

* Value below the limit of quantification: the actual share of the parametric value is not known; it lies somewhere below the stated upper bound. The marker shows where the limit of quantification of the measurement lies relative to the parametric value.

Show all recorded parameters (61 — most recent value per parameter)

Microbiology (2)

Microbiology – ZONA 2 MARMI
Parameter Value Parametric value Share of the parametric value Reference
Escherichia coli (E. coli) Conforme MPN/100 mL 0/100 ml — Median
Intestinal enterococci Conforme N/100 mL 0/100 ml — Median

Chemical parameters (28)

Chemical parameters – ZONA 2 MARMI
Parameter Value Parametric value Share of the parametric value Reference
1,2-dichloroethane <0,1 µg/L
below limit of quantification
 3 µg/l
< 3 % *
Median
Acrylamide <0,03 µg/L
below limit of quantification
 0.1 µg/l
< 30 % *
Median
Antimony <1,0 µg/L Sb
below limit of quantification
 10 µg/l — Median
Arsenic 3,10 µg/L As 10 µg/l
31 %
Median
Bisphenol A <0,25 µg/L
below limit of quantification
 2.5 µg/l
< 10 % *
Median
Boron 0,074 mg/L B 1.5 mg/l — Median
Cadmium <0,2 µg/L Cd
below limit of quantification
 5 µg/l — Median
Chlorate <0,05 mg/L ClO3
below limit of quantification
 0,25 — bzw. 0,70 bei Desinfektion mit Chlordioxid — Median
Chlorite <0,05 mg/L ClO2
below limit of quantification
 0,25 — bzw. 0,70 bei Desinfektion mit Chlordioxid — Median
Chromium <5,0 µg/L Cr
below limit of quantification
 25 µg/l — Median
Copper <0,001 mg/L Cu
below limit of quantification
 2 mg/l — Median
Cyanide <10 µg/L CN
below limit of quantification
 50 µg/l — Median
Epichlorohydrin <0,05 µg/L
below limit of quantification
 0.1 µg/l
< 50 % *
Median
Fluoride 0,61 mg/L 1.5 mg/l
41 %
Median
Haloacetic acids (HAA) - µg/L
not determined
 60 µg/l — Median
Lead <0,2 µg/L Pb
below limit of quantification
 10 µg/l — Median
Mercury <0,2 µg/L Hg
below limit of quantification
 1 µg/l — Median
Nickel <2,0 µg/L Ni
below limit of quantification
 20 µg/l — Median
Nitrate 3,08 mg/L NO3 50 mg/l
6 %
Median
Nitrite <0,05 mg/L NO2
below limit of quantification
 0.5 mg/l
< 10 % *
Median
Pesticides — Total - µg/L
not determined
 0.5 µg/l — Median
Polycyclic aromatic hydrocarbons - µg/L
not determined
 0.1 µg/l — Median
Selenium <1,0 µg/L Se
below limit of quantification
 20 µg/l — Median
Tetrachloroethene <1,0 µg/L
below limit of quantification
 — — Median
Trichloroethene <1,0 µg/L
below limit of quantification
 — — Median
Trihalomethanes — Total <1,0 µg/L
below limit of quantification
 30 µg/l
< 3 % *
Median
Uranium 5,25 µg/L U 30 µg/l — Median
Vinyl chloride <0,1 µg/L
below limit of quantification
 0.5 µg/l
< 20 % *
Median

* Value below the limit of quantification: the actual share of the parametric value is not known; it lies somewhere below the stated upper bound. The marker shows where the limit of quantification of the measurement lies relative to the parametric value.

PFAS (1)

PFAS – ZONA 2 MARMI
Parameter Value Parametric value Share of the parametric value Reference
Sum of PFAS <0,10 µg/L
below limit of quantification
 0.1 µg/l
< 100 % *
Median

* Value below the limit of quantification: the actual share of the parametric value is not known; it lies somewhere below the stated upper bound. The marker shows where the limit of quantification of the measurement lies relative to the parametric value.

Indicator parameters (16)

Indicator parameters – ZONA 2 MARMI
Parameter Value Parametric value Share of the parametric value Reference
Aluminium 1,3 µg/L Al 0.2 mg/l — Median
Ammonium <0,1 mg/L NH4
below limit of quantification
 0.5 mg/l
< 20 % *
Median
Chloride 11,1 mg/L Cl 250 mg/l
4 %
Median
Coliform bacteria Conforme MPN/100 mL 0/100 ml — Median
Colour Incolore Scala Pt/C accettabile per i consumatori, senza variazioni anomale — Median
Conductivity (25 °C) 429 µS/cm 2,500 µS/cm — Median
Iron 9,7 µg/L Fe 0.2 mg/l — Median
Manganese <0,2 µg/L Mn
below limit of quantification
 50 µg/l — Median
Odour 0 Diluiz. 25 accettabile per i consumatori, senza variazioni anomale — Median
pH 7,40 pH 6,5–9,5 — Median
Sodium 27,3 mg/L Na 200 mg/l
14 %
Median
Sulphate 3,08 mg/L SO4 250 mg/l
1 %
Median
Taste 0 tasso diluz. accettabile per i consumatori, senza variazioni anomale — Median
Temperature 13,5 °C — — Median
Total organic carbon (TOC) 0,37 mg/L C senza variazioni anomale — Median
Turbidity <0,5 NTU
below limit of quantification
 accettabile per i consumatori, senza variazioni anomale — Median

* Value below the limit of quantification: the actual share of the parametric value is not known; it lies somewhere below the stated upper bound. The marker shows where the limit of quantification of the measurement lies relative to the parametric value.

Treatment substances (1)

Treatment substances – ZONA 2 MARMI
Parameter Value Parametric value Share of the parametric value Reference
Free chlorine 0,25 mg/L Cl2 — — Median

Further parameters (13)

Further parameters – ZONA 2 MARMI
Parameter Value Parametric value Share of the parametric value Reference
Acid capacity to pH 4.3 229 mg/L CaCO3 — — Median
Beryllium <0,2 µg/L Be
below limit of quantification
 — — Median
Bromide <50 µg/L Br
below limit of quantification
 — — Median
Calcium 48,80 mg/L Ca — — Median
Dry residue 306,5 mg/L — — Median
Hydrogen carbonate 279 mg/L HCO3 — — Median
Magnesium 7,65 mg/L Mg — — Median
Phosphate <50 µg/L P2O5
below limit of quantification
 — — Median
Potassium 41,00 mg/L K — — Median
Silicate / silicic acid 36,9 mg/L SiO2 — — Median
Thallium <0,2 µg/L Tl
below limit of quantification
 — — Median
Total hardness 15,3 °F — — Median
Vanadium 2,35 µg/L V 0.14 mg/l — Median

Values taken unchanged from the publications linked below — for each parameter the most recent recorded value. „—" in the parametric value column: no currently valid legal parametric value is stored in our database for this parameter; the parameter register with all parametric values is being expanded continuously.

Source: https://www.aceaato2.a-acqua.it/content/dam/acea-ato2/pdf/it/mappe-qualita/velletri_zona_2_marmi.pdf · luglio 2026 · luglio 2026 · retrieved on 08/07/2026

Zona 3 Marrucco

ACEA ATO 2 S.p.A.
Water hardness
7.7 °dH
Key values Zona 3 Marrucco
Parameter Value Parametric value Share of the parametric value Reference
Sum of PFAS <0,10 µg/L
below limit of quantification
 0.1 µg/l
< 100 % *
Median
Nitrate 4,31 mg/L NO3 50 mg/l
9 %
Median
Lead <0,2 µg/L Pb
below limit of quantification
 10 µg/l — Median
Escherichia coli (E. coli) Conforme MPN/100 mL 0/100 ml — Median
Sulphate 3,83 mg/L SO4 250 mg/l
2 %
Median
Sodium 18,1 mg/L Na 200 mg/l
9 %
Median

* Value below the limit of quantification: the actual share of the parametric value is not known; it lies somewhere below the stated upper bound. The marker shows where the limit of quantification of the measurement lies relative to the parametric value.

Show all recorded parameters (61 — most recent value per parameter)

Microbiology (2)

Microbiology – Zona 3 Marrucco
Parameter Value Parametric value Share of the parametric value Reference
Escherichia coli (E. coli) Conforme MPN/100 mL 0/100 ml — Median
Intestinal enterococci Conforme N/100 mL 0/100 ml — Median

Chemical parameters (28)

Chemical parameters – Zona 3 Marrucco
Parameter Value Parametric value Share of the parametric value Reference
1,2-dichloroethane <0,1 µg/L
below limit of quantification
 3 µg/l
< 3 % *
Median
Acrylamide <0,03 µg/L
below limit of quantification
 0.1 µg/l
< 30 % *
Median
Antimony <1,0 µg/L Sb
below limit of quantification
 10 µg/l — Median
Arsenic 6,75 µg/L As 10 µg/l
68 %
Median
Bisphenol A <0,25 µg/L
below limit of quantification
 2.5 µg/l
< 10 % *
Median
Boron 0,067 mg/L B 1.5 mg/l — Median
Cadmium <0,2 µg/L Cd
below limit of quantification
 5 µg/l — Median
Chlorate <0,05 mg/L ClO3
below limit of quantification
 0,25 — bzw. 0,70 bei Desinfektion mit Chlordioxid — Median
Chlorite <0,05 mg/L ClO2
below limit of quantification
 0,25 — bzw. 0,70 bei Desinfektion mit Chlordioxid — Median
Chromium <5,0 µg/L Cr
below limit of quantification
 25 µg/l — Median
Copper <0,001 mg/L Cu
below limit of quantification
 2 mg/l — Median
Cyanide <10 µg/L CN
below limit of quantification
 50 µg/l — Median
Epichlorohydrin <0,05 µg/L
below limit of quantification
 0.1 µg/l
< 50 % *
Median
Fluoride 0,75 mg/L 1.5 mg/l
50 %
Median
Haloacetic acids (HAA) - µg/L
not determined
 60 µg/l — Median
Lead <0,2 µg/L Pb
below limit of quantification
 10 µg/l — Median
Mercury <0,2 µg/L Hg
below limit of quantification
 1 µg/l — Median
Nickel <2,0 µg/L Ni
below limit of quantification
 20 µg/l — Median
Nitrate 4,31 mg/L NO3 50 mg/l
9 %
Median
Nitrite <0,05 mg/L NO2
below limit of quantification
 0.5 mg/l
< 10 % *
Median
Pesticides — Total - µg/L
not determined
 0.5 µg/l — Median
Polycyclic aromatic hydrocarbons - µg/L
not determined
 0.1 µg/l — Median
Selenium <1,0 µg/L Se
below limit of quantification
 20 µg/l — Median
Tetrachloroethene <1,0 µg/L
below limit of quantification
 — — Median
Trichloroethene <1,0 µg/L
below limit of quantification
 — — Median
Trihalomethanes — Total <1,0 µg/L
below limit of quantification
 30 µg/l
< 3 % *
Median
Uranium 5,35 µg/L U 30 µg/l — Median
Vinyl chloride <0,1 µg/L
below limit of quantification
 0.5 µg/l
< 20 % *
Median

* Value below the limit of quantification: the actual share of the parametric value is not known; it lies somewhere below the stated upper bound. The marker shows where the limit of quantification of the measurement lies relative to the parametric value.

PFAS (1)

PFAS – Zona 3 Marrucco
Parameter Value Parametric value Share of the parametric value Reference
Sum of PFAS <0,10 µg/L
below limit of quantification
 0.1 µg/l
< 100 % *
Median

* Value below the limit of quantification: the actual share of the parametric value is not known; it lies somewhere below the stated upper bound. The marker shows where the limit of quantification of the measurement lies relative to the parametric value.

Indicator parameters (16)

Indicator parameters – Zona 3 Marrucco
Parameter Value Parametric value Share of the parametric value Reference
Aluminium 7,7 µg/L Al 0.2 mg/l — Median
Ammonium <0,1 mg/L NH4
below limit of quantification
 0.5 mg/l
< 20 % *
Median
Chloride 9,8 mg/L Cl 250 mg/l
4 %
Median
Coliform bacteria Conforme MPN/100 mL 0/100 ml — Median
Colour Incolore Scala Pt/C accettabile per i consumatori, senza variazioni anomale — Median
Conductivity (25 °C) 369 µS/cm 2,500 µS/cm — Median
Iron <5,0 µg/L Fe
below limit of quantification
 0.2 mg/l — Median
Manganese <0,2 µg/L Mn
below limit of quantification
 50 µg/l — Median
Odour 0 Diluiz. 25 accettabile per i consumatori, senza variazioni anomale — Median
pH 7,45 pH 6,5–9,5 — Median
Sodium 18,1 mg/L Na 200 mg/l
9 %
Median
Sulphate 3,83 mg/L SO4 250 mg/l
2 %
Median
Taste 0 tasso diluz. accettabile per i consumatori, senza variazioni anomale — Median
Temperature 15,5 °C — — Median
Total organic carbon (TOC) 0,43 mg/L C senza variazioni anomale — Median
Turbidity <0,5 NTU
below limit of quantification
 accettabile per i consumatori, senza variazioni anomale — Median

* Value below the limit of quantification: the actual share of the parametric value is not known; it lies somewhere below the stated upper bound. The marker shows where the limit of quantification of the measurement lies relative to the parametric value.

Treatment substances (1)

Treatment substances – Zona 3 Marrucco
Parameter Value Parametric value Share of the parametric value Reference
Free chlorine 0,25 mg/L Cl2 — — Median

Further parameters (13)

Further parameters – Zona 3 Marrucco
Parameter Value Parametric value Share of the parametric value Reference
Acid capacity to pH 4.3 191 mg/L CaCO3 — — Median
Beryllium <0,2 µg/L Be
below limit of quantification
 — — Median
Bromide <50 µg/L Br
below limit of quantification
 — — Median
Calcium 42,40 mg/L Ca — — Median
Dry residue 263,5 mg/L — — Median
Hydrogen carbonate 233 mg/L HCO3 — — Median
Magnesium 7,52 mg/L Mg — — Median
Phosphate <50 µg/L P2O5
below limit of quantification
 — — Median
Potassium 24,50 mg/L K — — Median
Silicate / silicic acid 31,2 mg/L SiO2 — — Median
Thallium <0,2 µg/L Tl
below limit of quantification
 — — Median
Total hardness 13,7 °F — — Median
Vanadium 6,10 µg/L V 0.14 mg/l — Median

Values taken unchanged from the publications linked below — for each parameter the most recent recorded value. „—" in the parametric value column: no currently valid legal parametric value is stored in our database for this parameter; the parameter register with all parametric values is being expanded continuously.

Source: https://www.aceaato2.a-acqua.it/content/dam/acea-ato2/pdf/it/mappe-qualita/velletri_zona_3_marrucco.pdf · luglio 2026 · luglio 2026 · retrieved on 08/07/2026

ZONA 4 PONTE DI MELE

ACEA ATO 2 S.p.A.
Water hardness
4.1 °dH
Key values ZONA 4 PONTE DI MELE
Parameter Value Parametric value Share of the parametric value Reference
Sum of PFAS <0,10 µg/L
below limit of quantification
 0.1 µg/l
< 100 % *
Median
Nitrate 21,10 mg/L NO3 50 mg/l
42 %
Median
Lead <0,2 µg/L Pb
below limit of quantification
 10 µg/l — Median
Escherichia coli (E. coli) Conforme MPN/100 mL 0/100 ml — Median
Sulphate 15,2 mg/L SO4 250 mg/l
6 %
Median
Sodium 27,5 mg/L Na 200 mg/l
14 %
Median

* Value below the limit of quantification: the actual share of the parametric value is not known; it lies somewhere below the stated upper bound. The marker shows where the limit of quantification of the measurement lies relative to the parametric value.

Show all recorded parameters (61 — most recent value per parameter)

Microbiology (2)

Microbiology – ZONA 4 PONTE DI MELE
Parameter Value Parametric value Share of the parametric value Reference
Escherichia coli (E. coli) Conforme MPN/100 mL 0/100 ml — Median
Intestinal enterococci Conforme N/100 mL 0/100 ml — Median

Chemical parameters (28)

Chemical parameters – ZONA 4 PONTE DI MELE
Parameter Value Parametric value Share of the parametric value Reference
1,2-dichloroethane <0,1 µg/L
below limit of quantification
 3 µg/l
< 3 % *
Median
Acrylamide <0,03 µg/L
below limit of quantification
 0.1 µg/l
< 30 % *
Median
Antimony <1,0 µg/L Sb
below limit of quantification
 10 µg/l — Median
Arsenic 8,60 µg/L As 10 µg/l
86 %
Median
Bisphenol A <0,25 µg/L
below limit of quantification
 2.5 µg/l
< 10 % *
Median
Boron 0,049 mg/L B 1.5 mg/l — Median
Cadmium <0,2 µg/L Cd
below limit of quantification
 5 µg/l — Median
Chlorate <0,05 mg/L ClO3
below limit of quantification
 0,25 — bzw. 0,70 bei Desinfektion mit Chlordioxid — Median
Chlorite <0,05 mg/L ClO2
below limit of quantification
 0,25 — bzw. 0,70 bei Desinfektion mit Chlordioxid — Median
Chromium <5,0 µg/L Cr
below limit of quantification
 25 µg/l — Median
Copper <0,001 mg/L Cu
below limit of quantification
 2 mg/l — Median
Cyanide <10 µg/L CN
below limit of quantification
 50 µg/l — Median
Epichlorohydrin <0,05 µg/L
below limit of quantification
 0.1 µg/l
< 50 % *
Median
Fluoride 0,96 mg/L 1.5 mg/l
64 %
Median
Haloacetic acids (HAA) - µg/L
not determined
 60 µg/l — Median
Lead <0,2 µg/L Pb
below limit of quantification
 10 µg/l — Median
Mercury <0,2 µg/L Hg
below limit of quantification
 1 µg/l — Median
Nickel <2,0 µg/L Ni
below limit of quantification
 20 µg/l — Median
Nitrate 21,10 mg/L NO3 50 mg/l
42 %
Median
Nitrite <0,05 mg/L NO2
below limit of quantification
 0.5 mg/l
< 10 % *
Median
Pesticides — Total - µg/L
not determined
 0.5 µg/l — Median
Polycyclic aromatic hydrocarbons - µg/L
not determined
 0.1 µg/l — Median
Selenium <1,0 µg/L Se
below limit of quantification
 20 µg/l — Median
Tetrachloroethene <1,0 µg/L
below limit of quantification
 — — Median
Trichloroethene <1,0 µg/L
below limit of quantification
 — — Median
Trihalomethanes — Total <1,0 µg/L
below limit of quantification
 30 µg/l
< 3 % *
Median
Uranium 3,45 µg/L U 30 µg/l — Median
Vinyl chloride <0,1 µg/L
below limit of quantification
 0.5 µg/l
< 20 % *
Median

* Value below the limit of quantification: the actual share of the parametric value is not known; it lies somewhere below the stated upper bound. The marker shows where the limit of quantification of the measurement lies relative to the parametric value.

PFAS (1)

PFAS – ZONA 4 PONTE DI MELE
Parameter Value Parametric value Share of the parametric value Reference
Sum of PFAS <0,10 µg/L
below limit of quantification
 0.1 µg/l
< 100 % *
Median

* Value below the limit of quantification: the actual share of the parametric value is not known; it lies somewhere below the stated upper bound. The marker shows where the limit of quantification of the measurement lies relative to the parametric value.

Indicator parameters (16)

Indicator parameters – ZONA 4 PONTE DI MELE
Parameter Value Parametric value Share of the parametric value Reference
Aluminium 3,3 µg/L Al 0.2 mg/l — Median
Ammonium <0,1 mg/L NH4
below limit of quantification
 0.5 mg/l
< 20 % *
Median
Chloride 23,2 mg/L Cl 250 mg/l
9 %
Median
Coliform bacteria Conforme MPN/100 mL 0/100 ml — Median
Colour Incolore Scala Pt/C accettabile per i consumatori, senza variazioni anomale — Median
Conductivity (25 °C) 328 µS/cm 2,500 µS/cm — Median
Iron 7,7 µg/L Fe 0.2 mg/l — Median
Manganese <0,2 µg/L Mn
below limit of quantification
 50 µg/l — Median
Odour 0 Diluiz. 25 accettabile per i consumatori, senza variazioni anomale — Median
pH 8,20 pH 6,5–9,5 — Median
Sodium 27,5 mg/L Na 200 mg/l
14 %
Median
Sulphate 15,2 mg/L SO4 250 mg/l
6 %
Median
Taste 0 tasso diluz. accettabile per i consumatori, senza variazioni anomale — Median
Temperature 20,0 °C — — Median
Total organic carbon (TOC) 0,39 mg/L C senza variazioni anomale — Median
Turbidity <0,5 NTU
below limit of quantification
 accettabile per i consumatori, senza variazioni anomale — Median

* Value below the limit of quantification: the actual share of the parametric value is not known; it lies somewhere below the stated upper bound. The marker shows where the limit of quantification of the measurement lies relative to the parametric value.

Treatment substances (1)

Treatment substances – ZONA 4 PONTE DI MELE
Parameter Value Parametric value Share of the parametric value Reference
Free chlorine 0,20 mg/L Cl2 — — Median

Further parameters (13)

Further parameters – ZONA 4 PONTE DI MELE
Parameter Value Parametric value Share of the parametric value Reference
Acid capacity to pH 4.3 125 mg/L CaCO3 — — Median
Beryllium <0,2 µg/L Be
below limit of quantification
 — — Median
Bromide 50 µg/L Br — — Median
Calcium 19,80 mg/L Ca — — Median
Dry residue 252 mg/L — — Median
Hydrogen carbonate 153 mg/L HCO3 — — Median
Magnesium 6,06 mg/L Mg — — Median
Phosphate <50 µg/L P2O5
below limit of quantification
 — — Median
Potassium 27,90 mg/L K — — Median
Silicate / silicic acid 31,1 mg/L SiO2 — — Median
Thallium <0,2 µg/L Tl
below limit of quantification
 — — Median
Total hardness 7,4 °F — — Median
Vanadium 29,20 µg/L V 0.14 mg/l — Median

Values taken unchanged from the publications linked below — for each parameter the most recent recorded value. „—" in the parametric value column: no currently valid legal parametric value is stored in our database for this parameter; the parameter register with all parametric values is being expanded continuously.

Source: https://www.aceaato2.a-acqua.it/content/dam/acea-ato2/pdf/it/mappe-qualita/velletri_zona_4_ponte_di_mele.pdf · luglio 2026 · luglio 2026 · retrieved on 08/07/2026

Zona 5 Fratelli Vicario

ACEA ATO 2 S.p.A.
Water hardness
3.9 °dH
Key values Zona 5 Fratelli Vicario
Parameter Value Parametric value Share of the parametric value Reference
Sum of PFAS <0,10 µg/L
below limit of quantification
 0.1 µg/l
< 100 % *
Median
Nitrate 15,00 mg/L NO3 50 mg/l
30 %
Median
Lead <0,2 µg/L Pb
below limit of quantification
 10 µg/l — Median
Escherichia coli (E. coli) Conforme MPN/100 mL 0/100 ml — Median
Sulphate 8,78 mg/L SO4 250 mg/l
4 %
Median
Sodium 22,4 mg/L Na 200 mg/l
11 %
Median

* Value below the limit of quantification: the actual share of the parametric value is not known; it lies somewhere below the stated upper bound. The marker shows where the limit of quantification of the measurement lies relative to the parametric value.

Show all recorded parameters (61 — most recent value per parameter)

Microbiology (2)

Microbiology – Zona 5 Fratelli Vicario
Parameter Value Parametric value Share of the parametric value Reference
Escherichia coli (E. coli) Conforme MPN/100 mL 0/100 ml — Median
Intestinal enterococci Conforme N/100 mL 0/100 ml — Median

Chemical parameters (28)

Chemical parameters – Zona 5 Fratelli Vicario
Parameter Value Parametric value Share of the parametric value Reference
1,2-dichloroethane <0,1 µg/L
below limit of quantification
 3 µg/l
< 3 % *
Median
Acrylamide <0,03 µg/L
below limit of quantification
 0.1 µg/l
< 30 % *
Median
Antimony <1,0 µg/L Sb
below limit of quantification
 10 µg/l — Median
Arsenic 8,50 µg/L As 10 µg/l
85 %
Median
Bisphenol A <0,25 µg/L
below limit of quantification
 2.5 µg/l
< 10 % *
Median
Boron 0,038 mg/L B 1.5 mg/l — Median
Cadmium <0,2 µg/L Cd
below limit of quantification
 5 µg/l — Median
Chlorate <0,05 mg/L ClO3
below limit of quantification
 0,25 — bzw. 0,70 bei Desinfektion mit Chlordioxid — Median
Chlorite <0,05 mg/L ClO2
below limit of quantification
 0,25 — bzw. 0,70 bei Desinfektion mit Chlordioxid — Median
Chromium <5,0 µg/L Cr
below limit of quantification
 25 µg/l — Median
Copper <0,001 mg/L Cu
below limit of quantification
 2 mg/l — Median
Cyanide <10 µg/L CN
below limit of quantification
 50 µg/l — Median
Epichlorohydrin <0,05 µg/L
below limit of quantification
 0.1 µg/l
< 50 % *
Median
Fluoride 0,72 mg/L 1.5 mg/l
48 %
Median
Haloacetic acids (HAA) - µg/L
not determined
 60 µg/l — Median
Lead <0,2 µg/L Pb
below limit of quantification
 10 µg/l — Median
Mercury <0,2 µg/L Hg
below limit of quantification
 1 µg/l — Median
Nickel <2,0 µg/L Ni
below limit of quantification
 20 µg/l — Median
Nitrate 15,00 mg/L NO3 50 mg/l
30 %
Median
Nitrite <0,05 mg/L NO2
below limit of quantification
 0.5 mg/l
< 10 % *
Median
Pesticides — Total - µg/L
not determined
 0.5 µg/l — Median
Polycyclic aromatic hydrocarbons - µg/L
not determined
 0.1 µg/l — Median
Selenium <1,0 µg/L Se
below limit of quantification
 20 µg/l — Median
Tetrachloroethene <1,0 µg/L
below limit of quantification
 — — Median
Trichloroethene <1,0 µg/L
below limit of quantification
 — — Median
Trihalomethanes — Total <1,0 µg/L
below limit of quantification
 30 µg/l
< 3 % *
Median
Uranium 2,70 µg/L U 30 µg/l — Median
Vinyl chloride <0,1 µg/L
below limit of quantification
 0.5 µg/l
< 20 % *
Median

* Value below the limit of quantification: the actual share of the parametric value is not known; it lies somewhere below the stated upper bound. The marker shows where the limit of quantification of the measurement lies relative to the parametric value.

PFAS (1)

PFAS – Zona 5 Fratelli Vicario
Parameter Value Parametric value Share of the parametric value Reference
Sum of PFAS <0,10 µg/L
below limit of quantification
 0.1 µg/l
< 100 % *
Median

* Value below the limit of quantification: the actual share of the parametric value is not known; it lies somewhere below the stated upper bound. The marker shows where the limit of quantification of the measurement lies relative to the parametric value.

Indicator parameters (16)

Indicator parameters – Zona 5 Fratelli Vicario
Parameter Value Parametric value Share of the parametric value Reference
Aluminium 1,6 µg/L Al 0.2 mg/l — Median
Ammonium <0,1 mg/L NH4
below limit of quantification
 0.5 mg/l
< 20 % *
Median
Chloride 17,1 mg/L Cl 250 mg/l
7 %
Median
Coliform bacteria Conforme MPN/100 mL 0/100 ml — Median
Colour Incolore Scala Pt/C accettabile per i consumatori, senza variazioni anomale — Median
Conductivity (25 °C) 281 µS/cm 2,500 µS/cm — Median
Iron 12,6 µg/L Fe 0.2 mg/l — Median
Manganese <0,2 µg/L Mn
below limit of quantification
 50 µg/l — Median
Odour 0 Diluiz. 25 accettabile per i consumatori, senza variazioni anomale — Median
pH 8,00 pH 6,5–9,5 — Median
Sodium 22,4 mg/L Na 200 mg/l
11 %
Median
Sulphate 8,78 mg/L SO4 250 mg/l
4 %
Median
Taste 0 tasso diluz. accettabile per i consumatori, senza variazioni anomale — Median
Temperature 15,0 °C — — Median
Total organic carbon (TOC) 0,37 mg/L C senza variazioni anomale — Median
Turbidity <0,5 NTU
below limit of quantification
 accettabile per i consumatori, senza variazioni anomale — Median

* Value below the limit of quantification: the actual share of the parametric value is not known; it lies somewhere below the stated upper bound. The marker shows where the limit of quantification of the measurement lies relative to the parametric value.

Treatment substances (1)

Treatment substances – Zona 5 Fratelli Vicario
Parameter Value Parametric value Share of the parametric value Reference
Free chlorine 0,19 mg/L Cl2 — — Median

Further parameters (13)

Further parameters – Zona 5 Fratelli Vicario
Parameter Value Parametric value Share of the parametric value Reference
Acid capacity to pH 4.3 120 mg/L CaCO3 — — Median
Beryllium <0,2 µg/L Be
below limit of quantification
 — — Median
Bromide 50 µg/L Br — — Median
Calcium 19,40 mg/L Ca — — Median
Dry residue 216 mg/L — — Median
Hydrogen carbonate 146 mg/L HCO3 — — Median
Magnesium 5,28 mg/L Mg — — Median
Phosphate <50 µg/L P2O5
below limit of quantification
 — — Median
Potassium 22,90 mg/L K — — Median
Silicate / silicic acid 34,5 mg/L SiO2 — — Median
Thallium <0,2 µg/L Tl
below limit of quantification
 — — Median
Total hardness 6,9 °F — — Median
Vanadium 24,50 µg/L V 0.14 mg/l — Median

Values taken unchanged from the publications linked below — for each parameter the most recent recorded value. „—" in the parametric value column: no currently valid legal parametric value is stored in our database for this parameter; the parameter register with all parametric values is being expanded continuously.

Source: https://www.aceaato2.a-acqua.it/content/dam/acea-ato2/pdf/it/mappe-qualita/velletri_zona_5_fratelli_vicario.pdf · luglio 2026 · luglio 2026 · retrieved on 08/07/2026

Zona 6 Maprol Le Corti

ACEA ATO 2 S.p.A.
Water hardness
4.3 °dH
Key values Zona 6 Maprol Le Corti
Parameter Value Parametric value Share of the parametric value Reference
Sum of PFAS <0,10 µg/L
below limit of quantification
 0.1 µg/l
< 100 % *
Median
Nitrate 14,05 mg/L NO3 50 mg/l
28 %
Median
Lead <0,2 µg/L Pb
below limit of quantification
 10 µg/l — Median
Escherichia coli (E. coli) Conforme MPN/100 mL 0/100 ml — Median
Sulphate 6,53 mg/L SO4 250 mg/l
3 %
Median
Sodium 22,8 mg/L Na 200 mg/l
11 %
Median

* Value below the limit of quantification: the actual share of the parametric value is not known; it lies somewhere below the stated upper bound. The marker shows where the limit of quantification of the measurement lies relative to the parametric value.

Show all recorded parameters (61 — most recent value per parameter)

Microbiology (2)

Microbiology – Zona 6 Maprol Le Corti
Parameter Value Parametric value Share of the parametric value Reference
Escherichia coli (E. coli) Conforme MPN/100 mL 0/100 ml — Median
Intestinal enterococci Conforme N/100 mL 0/100 ml — Median

Chemical parameters (28)

Chemical parameters – Zona 6 Maprol Le Corti
Parameter Value Parametric value Share of the parametric value Reference
1,2-dichloroethane <0,1 µg/L
below limit of quantification
 3 µg/l
< 3 % *
Median
Acrylamide <0,03 µg/L
below limit of quantification
 0.1 µg/l
< 30 % *
Median
Antimony <1,0 µg/L Sb
below limit of quantification
 10 µg/l — Median
Arsenic 5,45 µg/L As 10 µg/l
55 %
Median
Bisphenol A <0,25 µg/L
below limit of quantification
 2.5 µg/l
< 10 % *
Median
Boron 0,063 mg/L B 1.5 mg/l — Median
Cadmium <0,2 µg/L Cd
below limit of quantification
 5 µg/l — Median
Chlorate <0,05 mg/L ClO3
below limit of quantification
 0,25 — bzw. 0,70 bei Desinfektion mit Chlordioxid — Median
Chlorite <0,05 mg/L ClO2
below limit of quantification
 0,25 — bzw. 0,70 bei Desinfektion mit Chlordioxid — Median
Chromium <5,0 µg/L Cr
below limit of quantification
 25 µg/l — Median
Copper <0,001 mg/L Cu
below limit of quantification
 2 mg/l — Median
Cyanide <10 µg/L CN
below limit of quantification
 50 µg/l — Median
Epichlorohydrin <0,05 µg/L
below limit of quantification
 0.1 µg/l
< 50 % *
Median
Fluoride 1,03 mg/L 1.5 mg/l
69 %
Median
Haloacetic acids (HAA) - µg/L
not determined
 60 µg/l — Median
Lead <0,2 µg/L Pb
below limit of quantification
 10 µg/l — Median
Mercury <0,2 µg/L Hg
below limit of quantification
 1 µg/l — Median
Nickel <2,0 µg/L Ni
below limit of quantification
 20 µg/l — Median
Nitrate 14,05 mg/L NO3 50 mg/l
28 %
Median
Nitrite <0,05 mg/L NO2
below limit of quantification
 0.5 mg/l
< 10 % *
Median
Pesticides — Total - µg/L
not determined
 0.5 µg/l — Median
Polycyclic aromatic hydrocarbons - µg/L
not determined
 0.1 µg/l — Median
Selenium <1,0 µg/L Se
below limit of quantification
 20 µg/l — Median
Tetrachloroethene <1,0 µg/L
below limit of quantification
 — — Median
Trichloroethene <1,0 µg/L
below limit of quantification
 — — Median
Trihalomethanes — Total <1,0 µg/L
below limit of quantification
 30 µg/l
< 3 % *
Median
Uranium 4,66 µg/L U 30 µg/l — Median
Vinyl chloride <0,1 µg/L
below limit of quantification
 0.5 µg/l
< 20 % *
Median

* Value below the limit of quantification: the actual share of the parametric value is not known; it lies somewhere below the stated upper bound. The marker shows where the limit of quantification of the measurement lies relative to the parametric value.

PFAS (1)

PFAS – Zona 6 Maprol Le Corti
Parameter Value Parametric value Share of the parametric value Reference
Sum of PFAS <0,10 µg/L
below limit of quantification
 0.1 µg/l
< 100 % *
Median

* Value below the limit of quantification: the actual share of the parametric value is not known; it lies somewhere below the stated upper bound. The marker shows where the limit of quantification of the measurement lies relative to the parametric value.

Indicator parameters (16)

Indicator parameters – Zona 6 Maprol Le Corti
Parameter Value Parametric value Share of the parametric value Reference
Aluminium 3,9 µg/L Al 0.2 mg/l — Median
Ammonium <0,1 mg/L NH4
below limit of quantification
 0.5 mg/l
< 20 % *
Median
Chloride 14,9 mg/L Cl 250 mg/l
6 %
Median
Coliform bacteria Conforme MPN/100 mL 0/100 ml — Median
Colour Incolore Scala Pt/C accettabile per i consumatori, senza variazioni anomale — Median
Conductivity (25 °C) 291 µS/cm 2,500 µS/cm — Median
Iron <5,0 µg/L Fe
below limit of quantification
 0.2 mg/l — Median
Manganese <0,2 µg/L Mn
below limit of quantification
 50 µg/l — Median
Odour 0 Diluiz. 25 accettabile per i consumatori, senza variazioni anomale — Median
pH 7,60 pH 6,5–9,5 — Median
Sodium 22,8 mg/L Na 200 mg/l
11 %
Median
Sulphate 6,53 mg/L SO4 250 mg/l
3 %
Median
Taste 0 tasso diluz. accettabile per i consumatori, senza variazioni anomale — Median
Temperature 14,0 °C — — Median
Total organic carbon (TOC) 0,30 mg/L C senza variazioni anomale — Median
Turbidity <0,5 NTU
below limit of quantification
 accettabile per i consumatori, senza variazioni anomale — Median

* Value below the limit of quantification: the actual share of the parametric value is not known; it lies somewhere below the stated upper bound. The marker shows where the limit of quantification of the measurement lies relative to the parametric value.

Treatment substances (1)

Treatment substances – Zona 6 Maprol Le Corti
Parameter Value Parametric value Share of the parametric value Reference
Free chlorine 0,19 mg/L Cl2 — — Median

Further parameters (13)

Further parameters – Zona 6 Maprol Le Corti
Parameter Value Parametric value Share of the parametric value Reference
Acid capacity to pH 4.3 123 mg/L CaCO3 — — Median
Beryllium <0,2 µg/L Be
below limit of quantification
 — — Median
Bromide <50 µg/L Br
below limit of quantification
 — — Median
Calcium 21,10 mg/L Ca — — Median
Dry residue 224 mg/L — — Median
Hydrogen carbonate 150 mg/L HCO3 — — Median
Magnesium 5,48 mg/L Mg — — Median
Phosphate <50 µg/L P2O5
below limit of quantification
 — — Median
Potassium 23,95 mg/L K — — Median
Silicate / silicic acid 31,1 mg/L SiO2 — — Median
Thallium <0,2 µg/L Tl
below limit of quantification
 — — Median
Total hardness 7,6 °F — — Median
Vanadium 9,25 µg/L V 0.14 mg/l — Median

Values taken unchanged from the publications linked below — for each parameter the most recent recorded value. „—" in the parametric value column: no currently valid legal parametric value is stored in our database for this parameter; the parameter register with all parametric values is being expanded continuously.

Source: https://www.aceaato2.a-acqua.it/content/dam/acea-ato2/pdf/it/mappe-qualita/velletri_zona_6_maprol_le_corti.pdf · luglio 2026 · luglio 2026 · retrieved on 08/07/2026

Zona 8 Rioli

ACEA ATO 2 S.p.A.
Water hardness
1.2 °dH
Key values Zona 8 Rioli
Parameter Value Parametric value Share of the parametric value Reference
Sum of PFAS <0,10 µg/L
below limit of quantification
 0.1 µg/l
< 100 % *
Median
Nitrate 8,58 mg/L NO3 50 mg/l
17 %
Median
Lead <0,2 µg/L Pb
below limit of quantification
 10 µg/l — Median
Escherichia coli (E. coli) Conforme MPN/100 mL 0/100 ml — Median
Sulphate 4,32 mg/L SO4 250 mg/l
2 %
Median
Sodium 20,1 mg/L Na 200 mg/l
10 %
Median

* Value below the limit of quantification: the actual share of the parametric value is not known; it lies somewhere below the stated upper bound. The marker shows where the limit of quantification of the measurement lies relative to the parametric value.

Show all recorded parameters (61 — most recent value per parameter)

Microbiology (2)

Microbiology – Zona 8 Rioli
Parameter Value Parametric value Share of the parametric value Reference
Escherichia coli (E. coli) Conforme MPN/100 mL 0/100 ml — Median
Intestinal enterococci Conforme N/100 mL 0/100 ml — Median

Chemical parameters (28)

Chemical parameters – Zona 8 Rioli
Parameter Value Parametric value Share of the parametric value Reference
1,2-dichloroethane <0,1 µg/L
below limit of quantification
 3 µg/l
< 3 % *
Median
Acrylamide <0,03 µg/L
below limit of quantification
 0.1 µg/l
< 30 % *
Median
Antimony <1,0 µg/L Sb
below limit of quantification
 10 µg/l — Median
Arsenic 2,15 µg/L As 10 µg/l
22 %
Median
Bisphenol A <0,25 µg/L
below limit of quantification
 2.5 µg/l
< 10 % *
Median
Boron 0,160 mg/L B 1.5 mg/l — Median
Cadmium <0,2 µg/L Cd
below limit of quantification
 5 µg/l — Median
Chlorate <0,05 mg/L ClO3
below limit of quantification
 0,25 — bzw. 0,70 bei Desinfektion mit Chlordioxid — Median
Chlorite <0,05 mg/L ClO2
below limit of quantification
 0,25 — bzw. 0,70 bei Desinfektion mit Chlordioxid — Median
Chromium <5,0 µg/L Cr
below limit of quantification
 25 µg/l — Median
Copper <0,001 mg/L Cu
below limit of quantification
 2 mg/l — Median
Cyanide <10 µg/L CN
below limit of quantification
 50 µg/l — Median
Epichlorohydrin <0,05 µg/L
below limit of quantification
 0.1 µg/l
< 50 % *
Median
Fluoride 1,26 mg/L 1.5 mg/l
84 %
Median
Haloacetic acids (HAA) - µg/L
not determined
 60 µg/l — Median
Lead <0,2 µg/L Pb
below limit of quantification
 10 µg/l — Median
Mercury <0,2 µg/L Hg
below limit of quantification
 1 µg/l — Median
Nickel <2,0 µg/L Ni
below limit of quantification
 20 µg/l — Median
Nitrate 8,58 mg/L NO3 50 mg/l
17 %
Median
Nitrite <0,05 mg/L NO2
below limit of quantification
 0.5 mg/l
< 10 % *
Median
Pesticides — Total - µg/L
not determined
 0.5 µg/l — Median
Polycyclic aromatic hydrocarbons - µg/L
not determined
 0.1 µg/l — Median
Selenium <1,0 µg/L Se
below limit of quantification
 20 µg/l — Median
Tetrachloroethene <1,0 µg/L
below limit of quantification
 — — Median
Trichloroethene <1,0 µg/L
below limit of quantification
 — — Median
Trihalomethanes — Total <1,0 µg/L
below limit of quantification
 30 µg/l
< 3 % *
Median
Uranium 8,30 µg/L U 30 µg/l — Median
Vinyl chloride <0,1 µg/L
below limit of quantification
 0.5 µg/l
< 20 % *
Median

* Value below the limit of quantification: the actual share of the parametric value is not known; it lies somewhere below the stated upper bound. The marker shows where the limit of quantification of the measurement lies relative to the parametric value.

PFAS (1)

PFAS – Zona 8 Rioli
Parameter Value Parametric value Share of the parametric value Reference
Sum of PFAS <0,10 µg/L
below limit of quantification
 0.1 µg/l
< 100 % *
Median

* Value below the limit of quantification: the actual share of the parametric value is not known; it lies somewhere below the stated upper bound. The marker shows where the limit of quantification of the measurement lies relative to the parametric value.

Indicator parameters (16)

Indicator parameters – Zona 8 Rioli
Parameter Value Parametric value Share of the parametric value Reference
Aluminium 4,2 µg/L Al 0.2 mg/l — Median
Ammonium <0,1 mg/L NH4
below limit of quantification
 0.5 mg/l
< 20 % *
Median
Chloride 9,3 mg/L Cl 250 mg/l
4 %
Median
Coliform bacteria Conforme MPN/100 mL 0/100 ml — Median
Colour Incolore Scala Pt/C accettabile per i consumatori, senza variazioni anomale — Median
Conductivity (25 °C) 178 µS/cm 2,500 µS/cm — Median
Iron 15,8 µg/L Fe 0.2 mg/l — Median
Manganese 0,70 µg/L Mn 50 µg/l — Median
Odour 0 Diluiz. 25 accettabile per i consumatori, senza variazioni anomale — Median
pH 7,35 pH 6,5–9,5 — Median
Sodium 20,1 mg/L Na 200 mg/l
10 %
Median
Sulphate 4,32 mg/L SO4 250 mg/l
2 %
Median
Taste 0 tasso diluz. accettabile per i consumatori, senza variazioni anomale — Median
Temperature 15,0 °C — — Median
Total organic carbon (TOC) 0,30 mg/L C senza variazioni anomale — Median
Turbidity <0,5 NTU
below limit of quantification
 accettabile per i consumatori, senza variazioni anomale — Median

* Value below the limit of quantification: the actual share of the parametric value is not known; it lies somewhere below the stated upper bound. The marker shows where the limit of quantification of the measurement lies relative to the parametric value.

Treatment substances (1)

Treatment substances – Zona 8 Rioli
Parameter Value Parametric value Share of the parametric value Reference
Free chlorine 0,20 mg/L Cl2 — — Median

Further parameters (13)

Further parameters – Zona 8 Rioli
Parameter Value Parametric value Share of the parametric value Reference
Acid capacity to pH 4.3 66 mg/L CaCO3 — — Median
Beryllium <0,2 µg/L Be
below limit of quantification
 — — Median
Bromide <50 µg/L Br
below limit of quantification
 — — Median
Calcium 6,03 mg/L Ca — — Median
Dry residue 139,5 mg/L — — Median
Hydrogen carbonate 81 mg/L HCO3 — — Median
Magnesium 1,47 mg/L Mg — — Median
Phosphate <50 µg/L P2O5
below limit of quantification
 — — Median
Potassium 19,70 mg/L K — — Median
Silicate / silicic acid 24,4 mg/L SiO2 — — Median
Thallium <0,2 µg/L Tl
below limit of quantification
 — — Median
Total hardness 2,1 °F — — Median
Vanadium 1,90 µg/L V 0.14 mg/l — Median

Values taken unchanged from the publications linked below — for each parameter the most recent recorded value. „—" in the parametric value column: no currently valid legal parametric value is stored in our database for this parameter; the parameter register with all parametric values is being expanded continuously.

Source: https://www.aceaato2.a-acqua.it/content/dam/acea-ato2/pdf/it/mappe-qualita/velletri_zona_8_rioli.pdf · luglio 2026 · luglio 2026 · retrieved on 08/07/2026

ZONA 9 CASTELLO

ACEA ATO 2 S.p.A.
Water hardness
4.3 °dH
Key values ZONA 9 CASTELLO
Parameter Value Parametric value Share of the parametric value Reference
Sum of PFAS <0,10 µg/L
below limit of quantification
 0.1 µg/l
< 100 % *
Median
Nitrate 13,30 mg/L NO3 50 mg/l
27 %
Median
Lead <0,2 µg/L Pb
below limit of quantification
 10 µg/l — Median
Escherichia coli (E. coli) Conforme MPN/100 mL 0/100 ml — Median
Sulphate 7,005 mg/L SO4 250 mg/l
3 %
Median
Sodium 20,9 mg/L Na 200 mg/l
10 %
Median

* Value below the limit of quantification: the actual share of the parametric value is not known; it lies somewhere below the stated upper bound. The marker shows where the limit of quantification of the measurement lies relative to the parametric value.

Show all recorded parameters (61 — most recent value per parameter)

Microbiology (2)

Microbiology – ZONA 9 CASTELLO
Parameter Value Parametric value Share of the parametric value Reference
Escherichia coli (E. coli) Conforme MPN/100 mL 0/100 ml — Median
Intestinal enterococci Conforme N/100 mL 0/100 ml — Median

Chemical parameters (28)

Chemical parameters – ZONA 9 CASTELLO
Parameter Value Parametric value Share of the parametric value Reference
1,2-dichloroethane <0,1 µg/L
below limit of quantification
 3 µg/l
< 3 % *
Median
Acrylamide <0,03 µg/L
below limit of quantification
 0.1 µg/l
< 30 % *
Median
Antimony <1,0 µg/L Sb
below limit of quantification
 10 µg/l — Median
Arsenic 2,40 µg/L As 10 µg/l
24 %
Median
Bisphenol A <0,25 µg/L
below limit of quantification
 2.5 µg/l
< 10 % *
Median
Boron 0,054 mg/L B 1.5 mg/l — Median
Cadmium <0,2 µg/L Cd
below limit of quantification
 5 µg/l — Median
Chlorate <0,05 mg/L ClO3
below limit of quantification
 0,25 — bzw. 0,70 bei Desinfektion mit Chlordioxid — Median
Chlorite <0,05 mg/L ClO2
below limit of quantification
 0,25 — bzw. 0,70 bei Desinfektion mit Chlordioxid — Median
Chromium <5,0 µg/L Cr
below limit of quantification
 25 µg/l — Median
Copper <0,001 mg/L Cu
below limit of quantification
 2 mg/l — Median
Cyanide <10 µg/L CN
below limit of quantification
 50 µg/l — Median
Epichlorohydrin <0,05 µg/L
below limit of quantification
 0.1 µg/l
< 50 % *
Median
Fluoride 1,15 mg/L 1.5 mg/l
77 %
Median
Haloacetic acids (HAA) - µg/L
not determined
 60 µg/l — Median
Lead <0,2 µg/L Pb
below limit of quantification
 10 µg/l — Median
Mercury <0,2 µg/L Hg
below limit of quantification
 1 µg/l — Median
Nickel <2,0 µg/L Ni
below limit of quantification
 20 µg/l — Median
Nitrate 13,30 mg/L NO3 50 mg/l
27 %
Median
Nitrite <0,05 mg/L NO2
below limit of quantification
 0.5 mg/l
< 10 % *
Median
Pesticides — Total - µg/L
not determined
 0.5 µg/l — Median
Polycyclic aromatic hydrocarbons - µg/L
not determined
 0.1 µg/l — Median
Selenium <1,0 µg/L Se
below limit of quantification
 20 µg/l — Median
Tetrachloroethene <1,0 µg/L
below limit of quantification
 — — Median
Trichloroethene <1,0 µg/L
below limit of quantification
 — — Median
Trihalomethanes — Total <1,0 µg/L
below limit of quantification
 30 µg/l
< 3 % *
Median
Uranium 1,00 µg/L U 30 µg/l — Median
Vinyl chloride <0,1 µg/L
below limit of quantification
 0.5 µg/l
< 20 % *
Median

* Value below the limit of quantification: the actual share of the parametric value is not known; it lies somewhere below the stated upper bound. The marker shows where the limit of quantification of the measurement lies relative to the parametric value.

PFAS (1)

PFAS – ZONA 9 CASTELLO
Parameter Value Parametric value Share of the parametric value Reference
Sum of PFAS <0,10 µg/L
below limit of quantification
 0.1 µg/l
< 100 % *
Median

* Value below the limit of quantification: the actual share of the parametric value is not known; it lies somewhere below the stated upper bound. The marker shows where the limit of quantification of the measurement lies relative to the parametric value.

Indicator parameters (16)

Indicator parameters – ZONA 9 CASTELLO
Parameter Value Parametric value Share of the parametric value Reference
Aluminium 5,6 µg/L Al 0.2 mg/l — Median
Ammonium <0,1 mg/L NH4
below limit of quantification
 0.5 mg/l
< 20 % *
Median
Chloride 12,5 mg/L Cl 250 mg/l
5 %
Median
Coliform bacteria Conforme MPN/100 mL 0/100 ml — Median
Colour Incolore Scala Pt/C accettabile per i consumatori, senza variazioni anomale — Median
Conductivity (25 °C) 273 µS/cm 2,500 µS/cm — Median
Iron <5,0 µg/L Fe
below limit of quantification
 0.2 mg/l — Median
Manganese 0,20 µg/L Mn 50 µg/l — Median
Odour 0 Diluiz. 25 accettabile per i consumatori, senza variazioni anomale — Median
pH 7,60 pH 6,5–9,5 — Median
Sodium 20,9 mg/L Na 200 mg/l
10 %
Median
Sulphate 7,005 mg/L SO4 250 mg/l
3 %
Median
Taste 0 tasso diluz. accettabile per i consumatori, senza variazioni anomale — Median
Temperature 16,0 °C — — Median
Total organic carbon (TOC) 2,03 mg/L C senza variazioni anomale — Median
Turbidity <0,5 NTU
below limit of quantification
 accettabile per i consumatori, senza variazioni anomale — Median

* Value below the limit of quantification: the actual share of the parametric value is not known; it lies somewhere below the stated upper bound. The marker shows where the limit of quantification of the measurement lies relative to the parametric value.

Treatment substances (1)

Treatment substances – ZONA 9 CASTELLO
Parameter Value Parametric value Share of the parametric value Reference
Free chlorine 0,20 mg/L Cl2 — — Median

Further parameters (13)

Further parameters – ZONA 9 CASTELLO
Parameter Value Parametric value Share of the parametric value Reference
Acid capacity to pH 4.3 129 mg/L CaCO3 — — Median
Beryllium <0,2 µg/L Be
below limit of quantification
 — — Median
Bromide <50 µg/L Br
below limit of quantification
 — — Median
Calcium 22,20 mg/L Ca — — Median
Dry residue 210 mg/L — — Median
Hydrogen carbonate 157 mg/L HCO3 — — Median
Magnesium 4,82 mg/L Mg — — Median
Phosphate <50 µg/L P2O5
below limit of quantification
 — — Median
Potassium 21,20 mg/L K — — Median
Silicate / silicic acid 8,3 mg/L SiO2 — — Median
Thallium <0,2 µg/L Tl
below limit of quantification
 — — Median
Total hardness 7,6 °F — — Median
Vanadium 2,80 µg/L V 0.14 mg/l — Median

Values taken unchanged from the publications linked below — for each parameter the most recent recorded value. „—" in the parametric value column: no currently valid legal parametric value is stored in our database for this parameter; the parameter register with all parametric values is being expanded continuously.

Source: https://www.aceaato2.a-acqua.it/content/dam/acea-ato2/pdf/it/mappe-qualita/velletri_zona_9_castello.pdf · luglio 2026 · luglio 2026 · retrieved on 08/07/2026

How to read the share of the parametric value

12 % Share of the parametric value. The proportion of the permitted maximum that the measured value uses — here 12 %, so just over an eighth.
< 10 % * Below the limit of quantification. The substance was not detectable. The mark shows where the detection limit lies relative to the parametric value — the actual share of the parametric value is below that.

Several samples per year: for chemical parameters the mean value is given, for microbiological ones the highest measured value. There the parametric value is zero — a single finding would disappear in the average, and it is precisely that finding which is the information. Which reference applies is stated in the last column of the table.

Legal basis: Art. 18 D.Lgs. 18/2023 as amended by D.Lgs. 102/2025 (transposition of EU Directive 2020/2184). The values are not official — the publication of the Gestore, to which every row links, remains authoritative. Assignment of the comune: information in the analysis document, resolved against the municipality list of ISTAT (territorial status 01.01.2026, CC BY 4.0).