Italy · Comune

Drinking water in Canale Monterano

4 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 CASALINI

ACEA ATO 2 S.p.A.

Water hardness

5.8 °dH

Key values ZONA 1 CASALINI
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	13,00 mg/L NO3	50 mg/l	26 %	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	7,98 mg/L SO4	250 mg/l	3 %	Median
Sodium	14,9 mg/L Na	200 mg/l	7 %	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 CASALINI
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 CASALINI
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	<1,00 µg/L Sb below limit of quantification	10 µg/l	—	Median
Arsenic	9,15 µg/L As	10 µg/l	91 %	Median
Bisphenol A	<0,25 µg/L below limit of quantification	2.5 µg/l	< 10 % *	Median
Boron	0,056 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	1,46 mg/L	1.5 mg/l	97 %	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	13,00 mg/L NO3	50 mg/l	26 %	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	1,90 µg/L U	30 µg/l	—	Median
Vinyl chloride	<0,1 µg/L below limit of quantification	0.5 µg/l	< 20 % *	Median

PFAS (1)

PFAS – ZONA 1 CASALINI
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

Indicator parameters (16)

Indicator parameters – ZONA 1 CASALINI
Parameter	Value	Parametric value	Share of the parametric value	Reference
Aluminium	3,8 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	13,5 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)	279 µS/cm	2,500 µS/cm	—	Median
Iron	5,4 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	7,30 pH	6,5–9,5	—	Median
Sodium	14,9 mg/L Na	200 mg/l	7 %	Median
Sulphate	7,98 mg/L SO4	250 mg/l	3 %	Median
Taste	0 tasso diluz.	accettabile per i consumatori, senza variazioni anomale	—	Median
Temperature	15,0 °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

Treatment substances (1)

Treatment substances – ZONA 1 CASALINI
Parameter	Value	Parametric value	Share of the parametric value	Reference
Free chlorine	0,18 mg/L Cl2	—	—	Median

Further parameters (13)

Further parameters – ZONA 1 CASALINI
Parameter	Value	Parametric value	Share of the parametric value	Reference
Acid capacity to pH 4.3	116 mg/L CaCO3	—	—	Median
Beryllium	0,20 µg/L Be	—	—	Median
Bromide	<50 µg/L Br below limit of quantification	—	—	Median
Calcium	26,35 mg/L Ca	—	—	Median
Dry residue	214,5 mg/L	—	—	Median
Hydrogen carbonate	141 mg/L HCO3	—	—	Median
Magnesium	8,91 mg/L Mg	—	—	Median
Phosphate	126 µg/L P2O5	—	—	Median
Potassium	13,40 mg/L K	—	—	Median
Silicate / silicic acid	62,7 mg/L SiO2	—	—	Median
Thallium	<0,2 µg/L Tl below limit of quantification	—	—	Median
Total hardness	10,3 °F	—	—	Median
Vanadium	12,20 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/canale_monterano_zona_1_casalini.pdf · luglio 2026 · luglio 2026 · retrieved on 08/07/2026

ZONA 2 PALOMBARA

ACEA ATO 2 S.p.A.

Water hardness

5.5 °dH

Key values ZONA 2 PALOMBARA
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	11,90 mg/L NO3	50 mg/l	24 %	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	6,37 mg/L SO4	250 mg/l	3 %	Median
Sodium	17,3 mg/L Na	200 mg/l	9 %	Median

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

Microbiology (2)

Microbiology – ZONA 2 PALOMBARA
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 PALOMBARA
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	<1,00 µg/L Sb below limit of quantification	10 µg/l	—	Median
Arsenic	15,20 µg/L As	10 µg/l	152 % Mean above the parametric value	Median
Bisphenol A	<0,25 µg/L below limit of quantification	2.5 µg/l	< 10 % *	Median
Boron	0,058 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	1,14 mg/L	1.5 mg/l	76 %	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	11,90 mg/L NO3	50 mg/l	24 %	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	2,40 µg/L U	30 µg/l	—	Median
Vinyl chloride	<0,1 µg/L below limit of quantification	0.5 µg/l	< 20 % *	Median

Annual means and medians are not individual measured values, but the parametric values apply per sample. If a mean lies above it, at least one individual sample was above it — the mean does not say how many, or by how much. That is why this is not reported here as an exceedance of the parametric value. What counts remains the water supplier's publication, which each row links to.

PFAS (1)

PFAS – ZONA 2 PALOMBARA
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

Indicator parameters (16)

Indicator parameters – ZONA 2 PALOMBARA
Parameter	Value	Parametric value	Share of the parametric value	Reference
Aluminium	32,0 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	13,6 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)	300 µS/cm	2,500 µS/cm	—	Median
Iron	19,9 µg/L Fe	0.2 mg/l	—	Median
Manganese	0,35 µg/L Mn	50 µg/l	—	Median
Odour	0 Diluiz. 25	accettabile per i consumatori, senza variazioni anomale	—	Median
pH	7,85 pH	6,5–9,5	—	Median
Sodium	17,3 mg/L Na	200 mg/l	9 %	Median
Sulphate	6,37 mg/L SO4	250 mg/l	3 %	Median
Taste	0 tasso diluz.	accettabile per i consumatori, senza variazioni anomale	—	Median
Temperature	14,5 °C	—	—	Median
Total organic carbon (TOC)	1,35 mg/L C	senza variazioni anomale	—	Median
Turbidity	<0,5 NTU below limit of quantification	accettabile per i consumatori, senza variazioni anomale	—	Median

Treatment substances (1)

Treatment substances – ZONA 2 PALOMBARA
Parameter	Value	Parametric value	Share of the parametric value	Reference
Free chlorine	0,20 mg/L Cl2	—	—	Median

Further parameters (13)

Further parameters – ZONA 2 PALOMBARA
Parameter	Value	Parametric value	Share of the parametric value	Reference
Acid capacity to pH 4.3	136 mg/L CaCO3	—	—	Median
Beryllium	0,32 µg/L Be	—	—	Median
Bromide	<50 µg/L Br below limit of quantification	—	—	Median
Calcium	26,20 mg/L Ca	—	—	Median
Dry residue	230,5 mg/L	—	—	Median
Hydrogen carbonate	165 mg/L HCO3	—	—	Median
Magnesium	8,10 mg/L Mg	—	—	Median
Phosphate	195 µg/L P2O5	—	—	Median
Potassium	21,15 mg/L K	—	—	Median
Silicate / silicic acid	70,9 mg/L SiO2	—	—	Median
Thallium	<0,2 µg/L Tl below limit of quantification	—	—	Median
Total hardness	9,9 °F	—	—	Median
Vanadium	18,20 µg/L V	0.14 mg/l	—	Median

Source: https://www.aceaato2.a-acqua.it/content/dam/acea-ato2/pdf/it/mappe-qualita/canale_monterano_zona_2_palombara.pdf · luglio 2026 · luglio 2026 · retrieved on 08/07/2026

Zona 3 Monte Virginio

ACEA ATO 2 S.p.A.

Water hardness

5.6 °dH

Key values Zona 3 Monte Virginio
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	12,50 mg/L NO3	50 mg/l	25 %	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	5,34 mg/L SO4	250 mg/l	2 %	Median
Sodium	15,5 mg/L Na	200 mg/l	8 %	Median

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

Microbiology (2)

Microbiology – Zona 3 Monte Virginio
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 3 Monte Virginio
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	<1,00 µg/L Sb below limit of quantification	10 µg/l	—	Median
Arsenic	9,60 µg/L As	10 µg/l	96 %	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	1,46 mg/L	1.5 mg/l	97 %	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	12,50 mg/L NO3	50 mg/l	25 %	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	2,10 µg/L U	30 µg/l	—	Median
Vinyl chloride	<0,1 µg/L below limit of quantification	0.5 µg/l	< 20 % *	Median

PFAS (1)

PFAS – Zona 3 Monte Virginio
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

Indicator parameters (16)

Indicator parameters – Zona 3 Monte Virginio
Parameter	Value	Parametric value	Share of the parametric value	Reference
Aluminium	3,2 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	13,6 mg/L Cl	250 mg/l	5 %	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)	284 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	7,70 pH	6,5–9,5	—	Median
Sodium	15,5 mg/L Na	200 mg/l	8 %	Median
Sulphate	5,34 mg/L SO4	250 mg/l	2 %	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

Treatment substances (1)

Treatment substances – Zona 3 Monte Virginio
Parameter	Value	Parametric value	Share of the parametric value	Reference
Free chlorine	0,20 mg/L Cl2	—	—	Median

Further parameters (13)

Further parameters – Zona 3 Monte Virginio
Parameter	Value	Parametric value	Share of the parametric value	Reference
Acid capacity to pH 4.3	123 mg/L CaCO3	—	—	Median
Beryllium	0,30 µg/L Be	—	—	Median
Bromide	<50 µg/L Br below limit of quantification	—	—	Median
Calcium	25,80 mg/L Ca	—	—	Median
Dry residue	218 mg/L	—	—	Median
Hydrogen carbonate	150 mg/L HCO3	—	—	Median
Magnesium	8,71 mg/L Mg	—	—	Median
Phosphate	143 µg/L P2O5	—	—	Median
Potassium	16,60 mg/L K	—	—	Median
Silicate / silicic acid	64,3 mg/L SiO2	—	—	Median
Thallium	<0,2 µg/L Tl below limit of quantification	—	—	Median
Total hardness	10,0 °F	—	—	Median
Vanadium	13,20 µg/L V	0.14 mg/l	—	Median

Source: https://www.aceaato2.a-acqua.it/content/dam/acea-ato2/pdf/it/mappe-qualita/canale_monterano_zona_3_monte_virginio.pdf · luglio 2026 · luglio 2026 · retrieved on 08/07/2026

ZONA 4 FRANCONE

ACEA ATO 2 S.p.A.

Water hardness

5.5 °dH

Key values ZONA 4 FRANCONE
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	12,20 mg/L NO3	50 mg/l	24 %	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	6,45 mg/L SO4	250 mg/l	3 %	Median
Sodium	17,0 mg/L Na	200 mg/l	9 %	Median

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

Microbiology (2)

Microbiology – ZONA 4 FRANCONE
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 FRANCONE
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	<1,00 µg/L Sb below limit of quantification	10 µg/l	—	Median
Arsenic	14,20 µg/L As	10 µg/l	142 % Mean above the parametric value	Median
Bisphenol A	<0,25 µg/L below limit of quantification	2.5 µg/l	< 10 % *	Median
Boron	0,053 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	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	1,14 mg/L	1.5 mg/l	76 %	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	12,20 mg/L NO3	50 mg/l	24 %	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	2,90 µg/L U	30 µg/l	—	Median
Vinyl chloride	<0,1 µg/L below limit of quantification	0.5 µg/l	< 20 % *	Median

PFAS (1)

PFAS – ZONA 4 FRANCONE
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

Indicator parameters (16)

Indicator parameters – ZONA 4 FRANCONE
Parameter	Value	Parametric value	Share of the parametric value	Reference
Aluminium	26,8 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	14,1 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)	294 µS/cm	2,500 µS/cm	—	Median
Iron	30,0 µg/L Fe	0.2 mg/l	—	Median
Manganese	0,90 µg/L Mn	50 µg/l	—	Median
Odour	0 Diluiz. 25	accettabile per i consumatori, senza variazioni anomale	—	Median
pH	7,70 pH	6,5–9,5	—	Median
Sodium	17,0 mg/L Na	200 mg/l	9 %	Median
Sulphate	6,45 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)	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

Treatment substances (1)

Treatment substances – ZONA 4 FRANCONE
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 FRANCONE
Parameter	Value	Parametric value	Share of the parametric value	Reference
Acid capacity to pH 4.3	127 mg/L CaCO3	—	—	Median
Beryllium	0,29 µg/L Be	—	—	Median
Bromide	<50 µg/L Br below limit of quantification	—	—	Median
Calcium	26,10 mg/L Ca	—	—	Median
Dry residue	226 mg/L	—	—	Median
Hydrogen carbonate	155 mg/L HCO3	—	—	Median
Magnesium	8,03 mg/L Mg	—	—	Median
Phosphate	201 µg/L P2O5	—	—	Median
Potassium	19,90 mg/L K	—	—	Median
Silicate / silicic acid	71,2 mg/L SiO2	—	—	Median
Thallium	<0,2 µg/L Tl below limit of quantification	—	—	Median
Total hardness	9,9 °F	—	—	Median
Vanadium	18,55 µg/L V	0.14 mg/l	—	Median

Source: https://www.aceaato2.a-acqua.it/content/dam/acea-ato2/pdf/it/mappe-qualita/canale_monterano_zona_4_francone.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).