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Italy · Comune

Drinking water in Roma

10 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).

ZONA 1 MONTEVERDE VECCHIO

ACEA ATO 2 S.p.A.
Water hardness
19.4 °dH
Key values ZONA 1 MONTEVERDE VECCHIO
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 3,09 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 17,65 mg/L SO4 250 mg/l
7 %
Median
Sodium 4,6 mg/L Na 200 mg/l
2 %
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 MONTEVERDE VECCHIO
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 MONTEVERDE VECCHIO
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 1,13 µg/L As 10 µg/l
11 %
Median
Bisphenol A <0,25 µg/L
below limit of quantification
 2.5 µg/l
< 10 % *
Median
Boron 0,030 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 0,13 mg/L 1.5 mg/l
9 %
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 3,09 mg/L NO3 50 mg/l
6 %
Median
Nitrite <0,01 mg/L NO2
below limit of quantification
 0.5 mg/l
< 2 % *
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 1 MONTEVERDE VECCHIO
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 MONTEVERDE VECCHIO
Parameter Value Parametric value Share of the parametric value Reference
Aluminium 3,0 µg/L Al 0.2 mg/l — Median
Ammonium <0,03 mg/L NH4
below limit of quantification
 0.5 mg/l
< 6 % *
Median
Chloride 7,3 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) 581 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 7,55 pH 6,5–9,5 — Median
Sodium 4,6 mg/L Na 200 mg/l
2 %
Median
Sulphate 17,65 mg/L SO4 250 mg/l
7 %
Median
Taste 0 tasso diluz. accettabile per i consumatori, senza variazioni anomale — Median
Temperature 13,0 °C — — Median
Total organic carbon (TOC) 0,79 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 1 MONTEVERDE VECCHIO
Parameter Value Parametric value Share of the parametric value Reference
Free chlorine 0,16 mg/L Cl2 — — Median

Further parameters (13)

Further parameters – ZONA 1 MONTEVERDE VECCHIO
Parameter Value Parametric value Share of the parametric value Reference
Acid capacity to pH 4.3 337 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 106,00 mg/L Ca — — Median
Dry residue 415 mg/L — — Median
Hydrogen carbonate 411 mg/L HCO3 — — Median
Magnesium 19,75 mg/L Mg — — Median
Phosphate 55 µg/L P2O5 — — Median
Potassium 1,48 mg/L K — — Median
Silicate / silicic acid 8,2 mg/L SiO2 — — Median
Thallium <0,2 µg/L Tl
below limit of quantification
 — — Median
Total hardness 34,6 °F — — Median
Vanadium 3,50 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/roma_e_fiumicino_zona_1_monteverde_vecchio.pdf · luglio 2026 · luglio 2026 · retrieved on 08/07/2026

ZONA 2 PESCHIERA CAPORE + VIGNE NUOVE

ACEA ATO 2 S.p.A.
Water hardness
19.2 °dH
Key values ZONA 2 PESCHIERA CAPORE + VIGNE NUOVE
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 3,07 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 16,9 mg/L SO4 250 mg/l
7 %
Median
Sodium 4,0 mg/L Na 200 mg/l
2 %
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 PESCHIERA CAPORE + VIGNE NUOVE
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 PESCHIERA CAPORE + VIGNE NUOVE
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 0,002 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 0,12 mg/L 1.5 mg/l
8 %
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 3,07 mg/L NO3 50 mg/l
6 %
Median
Nitrite <0,01 mg/L NO2
below limit of quantification
 0.5 mg/l
< 2 % *
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 2 PESCHIERA CAPORE + VIGNE NUOVE
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 PESCHIERA CAPORE + VIGNE NUOVE
Parameter Value Parametric value Share of the parametric value Reference
Aluminium 1,1 µg/L Al 0.2 mg/l — Median
Ammonium <0,03 mg/L NH4
below limit of quantification
 0.5 mg/l
< 6 % *
Median
Chloride 6,6 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) 575 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 7,50 pH 6,5–9,5 — Median
Sodium 4,0 mg/L Na 200 mg/l
2 %
Median
Sulphate 16,9 mg/L SO4 250 mg/l
7 %
Median
Taste 0 tasso diluz. accettabile per i consumatori, senza variazioni anomale — Median
Temperature 13,0 °C — — Median
Total organic carbon (TOC) 0,45 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 PESCHIERA CAPORE + VIGNE NUOVE
Parameter Value Parametric value Share of the parametric value Reference
Free chlorine 0,19 mg/L Cl2 — — Median

Further parameters (13)

Further parameters – ZONA 2 PESCHIERA CAPORE + VIGNE NUOVE
Parameter Value Parametric value Share of the parametric value Reference
Acid capacity to pH 4.3 335 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 106,00 mg/L Ca — — Median
Dry residue 410,5 mg/L — — Median
Hydrogen carbonate 409 mg/L HCO3 — — Median
Magnesium 19,00 mg/L Mg — — Median
Phosphate <50 µg/L P2O5
below limit of quantification
 — — Median
Potassium 1,19 mg/L K — — Median
Silicate / silicic acid 4,9 mg/L SiO2 — — Median
Thallium <0,2 µg/L Tl
below limit of quantification
 — — Median
Total hardness 34,3 °F — — Median
Vanadium <1,0 µg/L V
below limit of quantification
 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/roma_e_fiumicino_zona_2_peschiera_capore_%2B_vigne_nuove.pdf · luglio 2026 · luglio 2026 · retrieved on 08/07/2026

ZONA 3 PESCHIERA CAPORE

ACEA ATO 2 S.p.A.
Water hardness
19.4 °dH
Key values ZONA 3 PESCHIERA CAPORE
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 3,03 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 16,8 mg/L SO4 250 mg/l
7 %
Median
Sodium 4,0 mg/L Na 200 mg/l
2 %
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 PESCHIERA CAPORE
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 PESCHIERA CAPORE
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 0,002 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 0,11 mg/L 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 3,03 mg/L NO3 50 mg/l
6 %
Median
Nitrite <0,01 mg/L NO2
below limit of quantification
 0.5 mg/l
< 2 % *
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 3 PESCHIERA CAPORE
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 PESCHIERA CAPORE
Parameter Value Parametric value Share of the parametric value Reference
Aluminium 1,1 µg/L Al 0.2 mg/l — Median
Ammonium <0,03 mg/L NH4
below limit of quantification
 0.5 mg/l
< 6 % *
Median
Chloride 6,5 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) 577 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 4,0 mg/L Na 200 mg/l
2 %
Median
Sulphate 16,8 mg/L SO4 250 mg/l
7 %
Median
Taste 0 tasso diluz. accettabile per i consumatori, senza variazioni anomale — Median
Temperature 13,0 °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 3 PESCHIERA CAPORE
Parameter Value Parametric value Share of the parametric value Reference
Free chlorine 0,16 mg/L Cl2 — — Median

Further parameters (13)

Further parameters – ZONA 3 PESCHIERA CAPORE
Parameter Value Parametric value Share of the parametric value Reference
Acid capacity to pH 4.3 336 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 107,00 mg/L Ca — — Median
Dry residue 413 mg/L — — Median
Hydrogen carbonate 410 mg/L HCO3 — — Median
Magnesium 19,20 mg/L Mg — — Median
Phosphate <50 µg/L P2O5
below limit of quantification
 — — Median
Potassium 1,20 mg/L K — — Median
Silicate / silicic acid 4,9 mg/L SiO2 — — Median
Thallium <0,2 µg/L Tl
below limit of quantification
 — — Median
Total hardness 34,6 °F — — Median
Vanadium <1,0 µg/L V
below limit of quantification
 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/roma_e_fiumicino_zona_3_peschiera_capore.pdf · luglio 2026 · luglio 2026 · retrieved on 08/07/2026

ZONA 4 NUOVO VERGINE PREVALENTE

ACEA ATO 2 S.p.A.
Water hardness
19.5 °dH
Key values ZONA 4 NUOVO VERGINE PREVALENTE
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 6,95 mg/L NO3 50 mg/l
14 %
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 29,2 mg/L SO4 250 mg/l
12 %
Median
Sodium 9,8 mg/L Na 200 mg/l
5 %
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 NUOVO VERGINE PREVALENTE
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 NUOVO VERGINE PREVALENTE
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 3,15 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 0,080 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 0,21 mg/L 1.5 mg/l
14 %
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 6,95 mg/L NO3 50 mg/l
14 %
Median
Nitrite <0,01 mg/L NO2
below limit of quantification
 0.5 mg/l
< 2 % *
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 4,25 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 4 NUOVO VERGINE PREVALENTE
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 NUOVO VERGINE PREVALENTE
Parameter Value Parametric value Share of the parametric value Reference
Aluminium 1,5 µg/L Al 0.2 mg/l — Median
Ammonium <0,03 mg/L NH4
below limit of quantification
 0.5 mg/l
< 6 % *
Median
Chloride 11,0 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) 633 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 7,50 pH 6,5–9,5 — Median
Sodium 9,8 mg/L Na 200 mg/l
5 %
Median
Sulphate 29,2 mg/L SO4 250 mg/l
12 %
Median
Taste 0 tasso diluz. accettabile per i consumatori, senza variazioni anomale — Median
Temperature 13,5 °C — — Median
Total organic carbon (TOC) 0,59 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 NUOVO VERGINE PREVALENTE
Parameter Value Parametric value Share of the parametric value Reference
Free chlorine 0,16 mg/L Cl2 — — Median

Further parameters (13)

Further parameters – ZONA 4 NUOVO VERGINE PREVALENTE
Parameter Value Parametric value Share of the parametric value Reference
Acid capacity to pH 4.3 344 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 107,00 mg/L Ca — — Median
Dry residue 453 mg/L — — Median
Hydrogen carbonate 420 mg/L HCO3 — — Median
Magnesium 19,60 mg/L Mg — — Median
Phosphate <50 µg/L P2O5
below limit of quantification
 — — Median
Potassium 7,20 mg/L K — — Median
Silicate / silicic acid 25,4 mg/L SiO2 — — Median
Thallium <0,2 µg/L Tl
below limit of quantification
 — — Median
Total hardness 34,8 °F — — Median
Vanadium 17,10 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/roma_e_fiumicino_zona_4_nuovo_vergine_prevalente.pdf · luglio 2026 · luglio 2026 · retrieved on 08/07/2026

ZONA 5 ACQUA MARCIA

ACEA ATO 2 S.p.A.
Water hardness
17.7 °dH
Key values ZONA 5 ACQUA MARCIA
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 2,06 mg/L NO3 50 mg/l
4 %
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 3,875 mg/L SO4 250 mg/l
2 %
Median
Sodium 2,9 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 5 ACQUA MARCIA
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 ACQUA MARCIA
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 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 2,06 mg/L NO3 50 mg/l
4 %
Median
Nitrite <0,01 mg/L NO2
below limit of quantification
 0.5 mg/l
< 2 % *
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 5 ACQUA MARCIA
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 ACQUA MARCIA
Parameter Value Parametric value Share of the parametric value Reference
Aluminium 7,4 µg/L Al 0.2 mg/l — Median
Ammonium <0,03 mg/L NH4
below limit of quantification
 0.5 mg/l
< 6 % *
Median
Chloride 5,3 mg/L Cl 250 mg/l
2 %
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) 523 µS/cm 2,500 µS/cm — Median
Iron 14,3 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 7,60 pH 6,5–9,5 — Median
Sodium 2,9 mg/L Na 200 mg/l
1 %
Median
Sulphate 3,875 mg/L SO4 250 mg/l
2 %
Median
Taste 0 tasso diluz. accettabile per i consumatori, senza variazioni anomale — Median
Temperature 13,0 °C — — Median
Total organic carbon (TOC) 1,29 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 ACQUA MARCIA
Parameter Value Parametric value Share of the parametric value Reference
Free chlorine 0,21 mg/L Cl2 — — Median

Further parameters (13)

Further parameters – ZONA 5 ACQUA MARCIA
Parameter Value Parametric value Share of the parametric value Reference
Acid capacity to pH 4.3 319 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 89,50 mg/L Ca — — Median
Dry residue 374 mg/L — — Median
Hydrogen carbonate 389 mg/L HCO3 — — Median
Magnesium 22,40 mg/L Mg — — Median
Phosphate <50 µg/L P2O5
below limit of quantification
 — — Median
Potassium 0,91 mg/L K — — Median
Silicate / silicic acid 3,8 mg/L SiO2 — — Median
Thallium <0,2 µg/L Tl
below limit of quantification
 — — Median
Total hardness 31,6 °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/roma_e_fiumicino_zona_5_acqua_marcia.pdf · luglio 2026 · luglio 2026 · retrieved on 08/07/2026

Zona 5 Villa Senni

ACEA ATO 2 S.p.A.
Water hardness
18.3 °dH
Key values Zona 5 Villa Senni
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 22,00 mg/L NO3 50 mg/l
44 %
Median
Lead 0,44 µg/L Pb 10 µg/l — Median
Escherichia coli (E. coli) Conforme MPN/100 mL 0/100 ml — Median
Sulphate 15,25 mg/L SO4 250 mg/l
6 %
Median
Sodium 29,7 mg/L Na 200 mg/l
15 %
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 Villa Senni
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 Villa Senni
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 3,00 µg/L As 10 µg/l
30 %
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 0,002 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 0,22 mg/L 1.5 mg/l
15 %
Median
Haloacetic acids (HAA) - µg/L
not determined
 60 µg/l — Median
Lead 0,44 µg/L Pb 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 22,00 mg/L NO3 50 mg/l
44 %
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 31,00 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 5 Villa Senni
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 Villa Senni
Parameter Value Parametric value Share of the parametric value Reference
Aluminium 2,3 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 21,0 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) 774 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 6,80 pH 6,5–9,5 — Median
Sodium 29,7 mg/L Na 200 mg/l
15 %
Median
Sulphate 15,25 mg/L SO4 250 mg/l
6 %
Median
Taste 0 tasso diluz. accettabile per i consumatori, senza variazioni anomale — Median
Temperature 13,5 °C — — Median
Total organic carbon (TOC) 0,73 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 Villa Senni
Parameter Value Parametric value Share of the parametric value Reference
Free chlorine 0,25 mg/L Cl2 — — Median

Further parameters (13)

Further parameters – Zona 5 Villa Senni
Parameter Value Parametric value Share of the parametric value Reference
Acid capacity to pH 4.3 402 mg/L CaCO3 — — Median
Beryllium 0,20 µg/L Be — — Median
Bromide <50 µg/L Br
below limit of quantification
 — — Median
Calcium 89,80 mg/L Ca — — Median
Dry residue 553 mg/L — — Median
Hydrogen carbonate 481 mg/L HCO3 — — Median
Magnesium 25,10 mg/L Mg — — Median
Phosphate 140 µg/L P2O5 — — Median
Potassium 39,20 mg/L K — — Median
Silicate / silicic acid 46,4 mg/L SiO2 — — Median
Thallium <0,2 µg/L Tl
below limit of quantification
 — — Median
Total hardness 32,7 °F — — Median
Vanadium 16,40 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/grottaferrata_zona_5_villa_senni.pdf · luglio 2026 · luglio 2026 · retrieved on 08/07/2026

Zona 6 Appio Alessandrino HC

ACEA ATO 2 S.p.A.
Water hardness
16.1 °dH
Key values Zona 6 Appio Alessandrino HC
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 8,91 mg/L NO3 50 mg/l
18 %
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 17,15 mg/L SO4 250 mg/l
7 %
Median
Sodium 12,3 mg/L Na 200 mg/l
6 %
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 Appio Alessandrino HC
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 Appio Alessandrino HC
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 6,10 µg/L As 10 µg/l
61 %
Median
Bisphenol A <0,25 µg/L
below limit of quantification
 2.5 µg/l
< 10 % *
Median
Boron 0,050 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 0,40 mg/L 1.5 mg/l
27 %
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 8,91 mg/L NO3 50 mg/l
18 %
Median
Nitrite <0,01 mg/L NO2
below limit of quantification
 0.5 mg/l
< 2 % *
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 2,40 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 6 Appio Alessandrino HC
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 Appio Alessandrino HC
Parameter Value Parametric value Share of the parametric value Reference
Aluminium 1,5 µg/L Al 0.2 mg/l — Median
Ammonium <0,03 mg/L NH4
below limit of quantification
 0.5 mg/l
< 6 % *
Median
Chloride 11,4 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) 559 µS/cm 2,500 µS/cm — Median
Iron 9,6 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 7,50 pH 6,5–9,5 — Median
Sodium 12,3 mg/L Na 200 mg/l
6 %
Median
Sulphate 17,15 mg/L SO4 250 mg/l
7 %
Median
Taste 0 tasso diluz. accettabile per i consumatori, senza variazioni anomale — Median
Temperature 13,0 °C — — Median
Total organic carbon (TOC) 0,47 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 Appio Alessandrino HC
Parameter Value Parametric value Share of the parametric value Reference
Free chlorine 0,18 mg/L Cl2 — — Median

Further parameters (13)

Further parameters – Zona 6 Appio Alessandrino HC
Parameter Value Parametric value Share of the parametric value Reference
Acid capacity to pH 4.3 298 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 86,00 mg/L Ca — — Median
Dry residue 399,5 mg/L — — Median
Hydrogen carbonate 363 mg/L HCO3 — — Median
Magnesium 17,90 mg/L Mg — — Median
Phosphate 63 µg/L P2O5 — — Median
Potassium 13,30 mg/L K — — Median
Silicate / silicic acid 15,3 mg/L SiO2 — — Median
Thallium <0,2 µg/L Tl
below limit of quantification
 — — Median
Total hardness 28,8 °F — — Median
Vanadium 11,49 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/roma_e_fiumicino_zona_6_appio_alessandrino_hc.pdf · luglio 2026 · luglio 2026 · retrieved on 08/07/2026

ZONA 7 APPIO ALESSANDRINO LC

ACEA ATO 2 S.p.A.
Water hardness
19.2 °dH
Key values ZONA 7 APPIO ALESSANDRINO LC
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 3,59 mg/L NO3 50 mg/l
7 %
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 20,85 mg/L SO4 250 mg/l
8 %
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 – ZONA 7 APPIO ALESSANDRINO LC
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 7 APPIO ALESSANDRINO LC
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 1,20 µg/L As 10 µg/l
12 %
Median
Bisphenol A <0,25 µg/L
below limit of quantification
 2.5 µg/l
< 10 % *
Median
Boron 0,040 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 0,15 mg/L 1.5 mg/l
10 %
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 3,59 mg/L NO3 50 mg/l
7 %
Median
Nitrite <0,01 mg/L NO2
below limit of quantification
 0.5 mg/l
< 2 % *
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 1,84 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 7 APPIO ALESSANDRINO LC
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 7 APPIO ALESSANDRINO LC
Parameter Value Parametric value Share of the parametric value Reference
Aluminium 1,3 µg/L Al 0.2 mg/l — Median
Ammonium <0,03 mg/L NH4
below limit of quantification
 0.5 mg/l
< 6 % *
Median
Chloride 9,2 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) 586 µS/cm 2,500 µS/cm — Median
Iron 9,3 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 7,50 pH 6,5–9,5 — Median
Sodium 6,5 mg/L Na 200 mg/l
3 %
Median
Sulphate 20,85 mg/L SO4 250 mg/l
8 %
Median
Taste 0 tasso diluz. accettabile per i consumatori, senza variazioni anomale — Median
Temperature 13,0 °C — — Median
Total organic carbon (TOC) 0,32 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 7 APPIO ALESSANDRINO LC
Parameter Value Parametric value Share of the parametric value Reference
Free chlorine 0,17 mg/L Cl2 — — Median

Further parameters (13)

Further parameters – ZONA 7 APPIO ALESSANDRINO LC
Parameter Value Parametric value Share of the parametric value Reference
Acid capacity to pH 4.3 333 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 104,00 mg/L Ca — — Median
Dry residue 419 mg/L — — Median
Hydrogen carbonate 406 mg/L HCO3 — — Median
Magnesium 19,90 mg/L Mg — — Median
Phosphate 58 µg/L P2O5 — — Median
Potassium 2,53 mg/L K — — Median
Silicate / silicic acid 11,7 mg/L SiO2 — — Median
Thallium <0,2 µg/L Tl
below limit of quantification
 — — Median
Total hardness 34,2 °F — — Median
Vanadium 8,08 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/roma_e_fiumicino_zona_7_appio_alessandrino_lc.pdf · luglio 2026 · luglio 2026 · retrieved on 08/07/2026

ZONA 8 ACQUA MARCIA + PESCHIERA CAPORE

ACEA ATO 2 S.p.A.
Water hardness
18.9 °dH
Key values ZONA 8 ACQUA MARCIA + PESCHIERA CAPORE
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 2,63 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 13,8 mg/L SO4 250 mg/l
6 %
Median
Sodium 4,2 mg/L Na 200 mg/l
2 %
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 ACQUA MARCIA + PESCHIERA CAPORE
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 ACQUA MARCIA + PESCHIERA CAPORE
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 0,12 mg/L 1.5 mg/l
8 %
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 2,63 mg/L NO3 50 mg/l
5 %
Median
Nitrite <0,01 mg/L NO2
below limit of quantification
 0.5 mg/l
< 2 % *
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 8 ACQUA MARCIA + PESCHIERA CAPORE
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 ACQUA MARCIA + PESCHIERA CAPORE
Parameter Value Parametric value Share of the parametric value Reference
Aluminium 5,0 µg/L Al 0.2 mg/l — Median
Ammonium <0,03 mg/L NH4
below limit of quantification
 0.5 mg/l
< 6 % *
Median
Chloride 7,0 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) 565 µS/cm 2,500 µS/cm — Median
Iron 10,7 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 7,50 pH 6,5–9,5 — Median
Sodium 4,2 mg/L Na 200 mg/l
2 %
Median
Sulphate 13,8 mg/L SO4 250 mg/l
6 %
Median
Taste 0 tasso diluz. accettabile per i consumatori, senza variazioni anomale — Median
Temperature 13,0 °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 8 ACQUA MARCIA + PESCHIERA CAPORE
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 ACQUA MARCIA + PESCHIERA CAPORE
Parameter Value Parametric value Share of the parametric value Reference
Acid capacity to pH 4.3 332 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 100,00 mg/L Ca — — Median
Dry residue 403,5 mg/L — — Median
Hydrogen carbonate 405 mg/L HCO3 — — Median
Magnesium 21,40 mg/L Mg — — Median
Phosphate <50 µg/L P2O5
below limit of quantification
 — — Median
Potassium 1,17 mg/L K — — Median
Silicate / silicic acid 4,1 mg/L SiO2 — — Median
Thallium <0,2 µg/L Tl
below limit of quantification
 — — Median
Total hardness 33,7 °F — — Median
Vanadium 1,50 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/roma_e_fiumicino_zona_8_acqua_marcia_%2B_peschiera_capore.pdf · luglio 2026 · luglio 2026 · retrieved on 08/07/2026

ZONA 9 OSTIA E ACILIA

ACEA ATO 2 S.p.A.
Water hardness
18.5 °dH
Key values ZONA 9 OSTIA E ACILIA
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 5,17 mg/L NO3 50 mg/l
10 %
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 19,5 mg/L SO4 250 mg/l
8 %
Median
Sodium 8,0 mg/L Na 200 mg/l
4 %
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 OSTIA E ACILIA
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 OSTIA E ACILIA
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 2,50 µg/L As 10 µg/l
25 %
Median
Bisphenol A <0,25 µg/L
below limit of quantification
 2.5 µg/l
< 10 % *
Median
Boron 0,030 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 0,21 mg/L 1.5 mg/l
14 %
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 5,17 mg/L NO3 50 mg/l
10 %
Median
Nitrite <0,01 mg/L NO2
below limit of quantification
 0.5 mg/l
< 2 % *
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 1,80 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 – ZONA 9 OSTIA E ACILIA
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 OSTIA E ACILIA
Parameter Value Parametric value Share of the parametric value Reference
Aluminium 4,0 µg/L Al 0.2 mg/l — Median
Ammonium <0,03 mg/L NH4
below limit of quantification
 0.5 mg/l
< 6 % *
Median
Chloride 9,7 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) 578 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 7,60 pH 6,5–9,5 — Median
Sodium 8,0 mg/L Na 200 mg/l
4 %
Median
Sulphate 19,5 mg/L SO4 250 mg/l
8 %
Median
Taste 0 tasso diluz. accettabile per i consumatori, senza variazioni anomale — Median
Temperature 13,0 °C — — Median
Total organic carbon (TOC) 0,78 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 OSTIA E ACILIA
Parameter Value Parametric value Share of the parametric value Reference
Free chlorine 0,17 mg/L Cl2 — — Median

Further parameters (13)

Further parameters – ZONA 9 OSTIA E ACILIA
Parameter Value Parametric value Share of the parametric value Reference
Acid capacity to pH 4.3 324 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 100,00 mg/L Ca — — Median
Dry residue 413 mg/L — — Median
Hydrogen carbonate 395 mg/L HCO3 — — Median
Magnesium 19,50 mg/L Mg — — Median
Phosphate 55 µg/L P2O5 — — Median
Potassium 5,58 mg/L K — — Median
Silicate / silicic acid 11,7 mg/L SiO2 — — Median
Thallium <0,2 µg/L Tl
below limit of quantification
 — — Median
Total hardness 33,0 °F — — Median
Vanadium 7,65 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/roma_e_fiumicino_zona_9_ostia_e_acilia.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).