Italy · Comune
Drinking water in Siano
One supply zone, published by GORI S.p.A.. The values come from the publications of the Italian water suppliers (gestori), which D.Lgs. 18/2023 requires of them from 12 January 2026. Italian parametric values apply: trihalomethanes 30 instead of 50 µg/l, chromium 25 µg/l, uranium 30 instead of 10 µg/l; for hardness there is no maximum value, it is given in French degrees (°F).
Comune di Siano
GORI S.p.A.| Parameter | Value | Parametric value | Share of the parametric value | Reference |
|---|---|---|---|---|
| Nitrate | 40 mg/l | 50 mg/l | 80 % | Mean · Comune di Siano |
| Lead | <1,0 µg/l below limit of quantification | 10 µg/l | < 10 % * | Mean · Comune di Siano |
| Escherichia coli (E. coli) | 0 MPN/100ml | 0/100 ml | — | Mean · Comune di Siano |
| Sulphate | 35 mg/l | 250 mg/l | 14 % | Mean · Comune di Siano |
| Sodium | 22 mg/l | 200 mg/l | 11 % | Mean · Comune di Siano |
* 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 (47 — most recent value per parameter)
Microbiology (2)
| Parameter | Value | Parametric value | Share of the parametric value | Reference |
|---|---|---|---|---|
| Escherichia coli (E. coli) | 0 MPN/100ml | 0/100 ml | — | Mean · Comune di Siano |
| Intestinal enterococci | 0 UFC/100ml | 0/100 ml | — | Mean · Comune di Siano |
Chemical parameters (21)
| Parameter | Value | Parametric value | Share of the parametric value | Reference |
|---|---|---|---|---|
| 1,2-dichloroethane | <0,50 µg/l below limit of quantification | 3 µg/l | < 17 % * | Mean · Comune di Siano |
| Antimony | <1,0 µg/l below limit of quantification | 10 µg/l | < 10 % * | Mean · Comune di Siano |
| Arsenic | 2,5 µg/l | 10 µg/l | 25 % | Mean · Comune di Siano |
| Benzene | <0,25 µg/l below limit of quantification | 1 µg/l | < 25 % * | Mean · Comune di Siano |
| Benzo(a)pyrene | <0,003 µg/l below limit of quantification | 10 ng/l | < 30 % * | Mean · Comune di Siano |
| Boron | 0,03 mg/l | 1.5 mg/l | 2 % | Mean · Comune di Siano |
| Cadmium | <1,0 µg/l below limit of quantification | 5 µg/l | < 20 % * | Mean · Comune di Siano |
| Chlorite | <0,05 mg/l below limit of quantification | 0,25 — bzw. 0,70 bei Desinfektion mit Chlordioxid | — | Mean · Comune di Siano |
| Chromium | <5,0 µg/l below limit of quantification | 25 µg/l | < 20 % * | Mean · Comune di Siano |
| Copper | <0,03 mg/l below limit of quantification | 2 mg/l | < 2 % * | Mean · Comune di Siano |
| Cyanide | <5,0 µg/l below limit of quantification | 50 µg/l | < 10 % * | Mean · Comune di Siano |
| Fluoride | 0,47 mg/l | 1.5 mg/l | 31 % | Mean · Comune di Siano |
| Lead | <1,0 µg/l below limit of quantification | 10 µg/l | < 10 % * | Mean · Comune di Siano |
| Mercury | <0,20 µg/l below limit of quantification | 1 µg/l | < 20 % * | Mean · Comune di Siano |
| Nickel | 1,1 µg/l | 20 µg/l | 6 % | Mean · Comune di Siano |
| Nitrate | 40 mg/l | 50 mg/l | 80 % | Mean · Comune di Siano |
| Nitrite | <0,05 mg/l below limit of quantification | 0.5 mg/l | < 10 % * | Mean · Comune di Siano |
| Polycyclic aromatic hydrocarbons | <0,025 µg/l below limit of quantification | 0.1 µg/l | < 25 % * | Mean · Comune di Siano |
| Selenium | <1,0 µg/l below limit of quantification | 20 µg/l | < 5 % * | Mean · Comune di Siano |
| Tetrachloroethene and Trichloroethene (sum) | 0,6 µg/l | 10 µg/l | 6 % | Mean · Comune di Siano |
| Trihalomethanes — Total | 10,2 µg/l | 30 µg/l | 34 % | Mean · Comune di Siano |
* 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 | <25 µg/l below limit of quantification | 0.2 mg/l | < 12 % * | Mean · Comune di Siano |
| Ammonium | <0,05 mg/l below limit of quantification | 0.5 mg/l | < 10 % * | Mean · Comune di Siano |
| Chloride | 23 mg/l | 250 mg/l | 9 % | Mean · Comune di Siano |
| Coliform bacteria | 0 MPN/100ml | 0/100 ml | — | Mean · Comune di Siano |
| Colony count 22 °C | 1 UFC/ml | senza variazioni anomale | — | Mean · Comune di Siano |
| Colour | <10 Hazen below limit of quantification | accettabile per i consumatori, senza variazioni anomale | — | Mean · Comune di Siano |
| Conductivity (25 °C) | 627 microS/cm | 2,500 µS/cm | — | Mean · Comune di Siano |
| Iron | <25 µg/l below limit of quantification | 0.2 mg/l | < 12 % * | Mean · Comune di Siano |
| Manganese | <5,0 µg/l below limit of quantification | 50 µg/l | < 10 % * | Mean · Comune di Siano |
| Odour | Nessuno odore rivelabile - | accettabile per i consumatori, senza variazioni anomale | — | Mean · Comune di Siano |
| pH | 7,5 - | 6,5–9,5 | — | Mean · Comune di Siano |
| Sodium | 22 mg/l | 200 mg/l | 11 % | Mean · Comune di Siano |
| Sulphate | 35 mg/l | 250 mg/l | 14 % | Mean · Comune di Siano |
| Taste | Accettabile - | accettabile per i consumatori, senza variazioni anomale | — | Mean · Comune di Siano |
| Total organic carbon (TOC) | <1,0 mg/l below limit of quantification | senza variazioni anomale | — | Mean · Comune di Siano |
| Turbidity | <0,5 NTU below limit of quantification | accettabile per i consumatori, senza variazioni anomale | — | Mean · Comune di Siano |
* 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 |
|---|---|---|---|---|
| Total chlorine | 0,19 mg/l | — | — | Mean · Comune di Siano |
Further parameters (7)
| Parameter | Value | Parametric value | Share of the parametric value | Reference |
|---|---|---|---|---|
| Acid capacity to pH 4.3 | 353 mg/l | — | — | Mean · Comune di Siano |
| Calcium | 84 mg/l | — | — | Mean · Comune di Siano |
| Dry residue | 454 mg/l | — | — | Mean · Comune di Siano |
| Magnesium | 20 mg/l | — | — | Mean · Comune di Siano |
| Potassium | 17 mg/l | — | — | Mean · Comune di Siano |
| Total hardness | 29 °F | — | — | Mean · Comune di Siano |
| Vanadium | 7,2 µg/l | 0.14 mg/l | 5 % | Mean · Comune di Siano |
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).