Italy · Comune
Drinking water in Colleferro
2 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 PAESE
ACEA ATO 2 S.p.A.| 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 | 18,15 mg/L NO3 | 50 mg/l | 36 % | Median |
| Lead | <0,2 µg/L Pb below limit of quantification | 10 µg/l | — | Median |
| Escherichia coli (E. coli) | Conforme MPN/100 mL | 0/100 ml | — | Median |
| Sulphate | 10,2 mg/L SO4 | 250 mg/l | 4 % | Median |
| Sodium | 16,2 mg/L Na | 200 mg/l | 8 % | 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)
| 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)
| 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 | 4,10 µg/L As | 10 µg/l | 41 % | Median |
| Bisphenol A | <0,25 µg/L below limit of quantification | 2.5 µg/l | < 10 % * | Median |
| Boron | 0,041 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 | 0,25 mg/L | 1.5 mg/l | 17 % | 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 | 18,15 mg/L NO3 | 50 mg/l | 36 % | 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 | 1,3 µg/L | 30 µg/l | 4 % | Median |
| Uranium | 2,85 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)
| 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)
| Parameter | Value | Parametric value | Share of the parametric value | Reference |
|---|---|---|---|---|
| Aluminium | 10,2 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 | 15,8 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) | 459 µS/cm | 2,500 µS/cm | — | Median |
| Iron | 15,1 µg/L Fe | 0.2 mg/l | — | Median |
| Manganese | 3,10 µg/L Mn | 50 µg/l | — | Median |
| Odour | 0 Diluiz. 25 | accettabile per i consumatori, senza variazioni anomale | — | Median |
| pH | 7,65 pH | 6,5–9,5 | — | Median |
| Sodium | 16,2 mg/L Na | 200 mg/l | 8 % | Median |
| Sulphate | 10,2 mg/L SO4 | 250 mg/l | 4 % | Median |
| Taste | 0 tasso diluz. | accettabile per i consumatori, senza variazioni anomale | — | Median |
| Temperature | 15,0 °C | — | — | Median |
| Total organic carbon (TOC) | 0,50 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)
| Parameter | Value | Parametric value | Share of the parametric value | Reference |
|---|---|---|---|---|
| Free chlorine | 0,24 mg/L Cl2 | — | — | Median |
Further parameters (13)
| Parameter | Value | Parametric value | Share of the parametric value | Reference |
|---|---|---|---|---|
| Acid capacity to pH 4.3 | 228 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 | 67,45 mg/L Ca | — | — | Median |
| Dry residue | 328 mg/L | — | — | Median |
| Hydrogen carbonate | 278 mg/L HCO3 | — | — | Median |
| Magnesium | 10,60 mg/L Mg | — | — | Median |
| Phosphate | 79 µg/L P2O5 | — | — | Median |
| Potassium | 11,90 mg/L K | — | — | Median |
| Silicate / silicic acid | 30,7 mg/L SiO2 | — | — | Median |
| Thallium | <0,2 µg/L Tl below limit of quantification | — | — | Median |
| Total hardness | 21,1 °F | — | — | Median |
| Vanadium | 8,30 µg/L V | 0.14 mg/l | — | Median |
Values taken unchanged from the publications linked below — for each parameter the most recent recorded value. „—" in the parametric value column: no currently valid legal parametric value is stored in our database for this parameter; the parameter register with all parametric values is being expanded continuously.
ZONA 2 SECOSVIM CSPA
ACEA ATO 2 S.p.A.| 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 | 8,95 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 | 28,7 mg/L SO4 | 250 mg/l | 11 % | Median |
| Sodium | 26,7 mg/L Na | 200 mg/l | 13 % | Median |
* Value below the limit of quantification: the actual share of the parametric value is not known; it lies somewhere below the stated upper bound. The marker shows where the limit of quantification of the measurement lies relative to the parametric value.
Show all recorded parameters (61 — most recent value per parameter)
Microbiology (2)
| 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)
| 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 | 2,80 µg/L As | 10 µg/l | 28 % | Median |
| Bisphenol A | <0,25 µg/L below limit of quantification | 2.5 µg/l | < 10 % * | Median |
| Boron | 0,069 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 | 0,31 mg/L | 1.5 mg/l | 21 % | 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 | 8,95 mg/L NO3 | 50 mg/l | 18 % | 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 | 1,30 µg/L U | 30 µg/l | — | Median |
| Vinyl chloride | <0,1 µg/L below limit of quantification | 0.5 µg/l | < 20 % * | Median |
* Value below the limit of quantification: the actual share of the parametric value is not known; it lies somewhere below the stated upper bound. The marker shows where the limit of quantification of the measurement lies relative to the parametric value.
PFAS (1)
| 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)
| Parameter | Value | Parametric value | Share of the parametric value | Reference |
|---|---|---|---|---|
| Aluminium | 1,1 µg/L Al | 0.2 mg/l | — | Median |
| Ammonium | <0,1 mg/L NH4 below limit of quantification | 0.5 mg/l | < 20 % * | Median |
| Chloride | 19,3 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) | 457 µS/cm | 2,500 µS/cm | — | Median |
| Iron | 5,5 µg/L Fe | 0.2 mg/l | — | Median |
| Manganese | 0,40 µg/L Mn | 50 µg/l | — | Median |
| Odour | 0 Diluiz. 25 | accettabile per i consumatori, senza variazioni anomale | — | Median |
| pH | 7,70 pH | 6,5–9,5 | — | Median |
| Sodium | 26,7 mg/L Na | 200 mg/l | 13 % | Median |
| Sulphate | 28,7 mg/L SO4 | 250 mg/l | 11 % | Median |
| Taste | 0 tasso diluz. | accettabile per i consumatori, senza variazioni anomale | — | Median |
| Temperature | 13,5 °C | — | — | Median |
| Total organic carbon (TOC) | 10,00 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)
| Parameter | Value | Parametric value | Share of the parametric value | Reference |
|---|---|---|---|---|
| Free chlorine | 0,20 mg/L Cl2 | — | — | Median |
Further parameters (13)
| Parameter | Value | Parametric value | Share of the parametric value | Reference |
|---|---|---|---|---|
| Acid capacity to pH 4.3 | 209 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 | 61,20 mg/L Ca | — | — | Median |
| Dry residue | 327 mg/L | — | — | Median |
| Hydrogen carbonate | 255 mg/L HCO3 | — | — | Median |
| Magnesium | 9,21 mg/L Mg | — | — | Median |
| Phosphate | 83 µg/L P2O5 | — | — | Median |
| Potassium | 10,90 mg/L K | — | — | Median |
| Silicate / silicic acid | 25,9 mg/L SiO2 | — | — | Median |
| Thallium | <0,2 µg/L Tl below limit of quantification | — | — | Median |
| Total hardness | 19,1 °F | — | — | Median |
| Vanadium | 4,40 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.
How to read the share of the parametric value
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).