Italy · Comune
Drinking water in Ischia
3 supply zones, published by it-evi-spa. 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).
C.so Vittoria Colonna (istituto Isabella d'Este) Rapporto 20824/25
it-evi-spa| Parameter | Value | Parametric value | Share of the parametric value | Reference |
|---|---|---|---|---|
| Nitrate | 4 mg/l | 50 mg/l | 8 % | Single value · C.so Vittoria Colonna (istituto Isabella d'Este) - Rapporto 20824/25 |
| Escherichia coli (E. coli) | 0 MPN/100 ml | 0/100 ml | — | Single value · C.so Vittoria Colonna (istituto Isabella d'Este) - Rapporto 20824/25 |
Show all recorded parameters (17 — most recent value per parameter)
Microbiology (2)
| Parameter | Value | Parametric value | Share of the parametric value | Reference |
|---|---|---|---|---|
| Escherichia coli (E. coli) | 0 MPN/100 ml | 0/100 ml | — | Single value · C.so Vittoria Colonna (istituto Isabella d'Este) - Rapporto 20824/25 |
| Intestinal enterococci | 0 UFC/100 ml | 0/100 ml | — | Single value · C.so Vittoria Colonna (istituto Isabella d'Este) - Rapporto 20824/25 |
Chemical parameters (2)
| Parameter | Value | Parametric value | Share of the parametric value | Reference |
|---|---|---|---|---|
| Nitrate | 4 mg/l | 50 mg/l | 8 % | Single value · C.so Vittoria Colonna (istituto Isabella d'Este) - Rapporto 20824/25 |
| Nitrite | <0.05 mg/l below limit of quantification | 0.5 mg/l | < 10 % * | Single value · C.so Vittoria Colonna (istituto Isabella d'Este) - Rapporto 20824/25 |
* 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 (9)
| Parameter | Value | Parametric value | Share of the parametric value | Reference |
|---|---|---|---|---|
| Ammonium | <0.05 mg/l below limit of quantification | 0.5 mg/l | < 10 % * | Single value · C.so Vittoria Colonna (istituto Isabella d'Este) - Rapporto 20824/25 |
| Coliform bacteria | 0 MPN/100 ml | 0/100 ml | — | Single value · C.so Vittoria Colonna (istituto Isabella d'Este) - Rapporto 20824/25 |
| Colony count 22 °C | presente UFC/ml | senza variazioni anomale | — | Single value · C.so Vittoria Colonna (istituto Isabella d'Este) - Rapporto 20824/25 |
| Colour | <10 Hazen below limit of quantification | accettabile per i consumatori, senza variazioni anomale | — | Single value · C.so Vittoria Colonna (istituto Isabella d'Este) - Rapporto 20824/25 |
| Conductivity (25 °C) | 727 microS/cm | 2,500 µS/cm | — | Single value · C.so Vittoria Colonna (istituto Isabella d'Este) - Rapporto 20824/25 |
| Odour | nessun odore rivelabile | accettabile per i consumatori, senza variazioni anomale | — | Single value · C.so Vittoria Colonna (istituto Isabella d'Este) - Rapporto 20824/25 |
| pH | 7.4 pH | 6,5–9,5 | — | Single value · C.so Vittoria Colonna (istituto Isabella d'Este) - Rapporto 20824/25 |
| Taste | accettabile | accettabile per i consumatori, senza variazioni anomale | — | Single value · C.so Vittoria Colonna (istituto Isabella d'Este) - Rapporto 20824/25 |
| Turbidity | <0.5 NTU below limit of quantification | accettabile per i consumatori, senza variazioni anomale | — | Single value · C.so Vittoria Colonna (istituto Isabella d'Este) - Rapporto 20824/25 |
* 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 | 0.17 mg/l | — | — | Single value · C.so Vittoria Colonna (istituto Isabella d'Este) - Rapporto 20824/25 |
Further parameters (3)
| Parameter | Value | Parametric value | Share of the parametric value | Reference |
|---|---|---|---|---|
| Calcium | 121 mg/l | — | — | Single value · C.so Vittoria Colonna (istituto Isabella d'Este) - Rapporto 20824/25 |
| Magnesium | 29 mg/l | — | — | Single value · C.so Vittoria Colonna (istituto Isabella d'Este) - Rapporto 20824/25 |
| Total hardness | 42 °F | — | — | Single value · C.so Vittoria Colonna (istituto Isabella d'Este) - Rapporto 20824/25 |
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.
Via Alfredo De Luca (scuola Marconi) Rapporto 20826/25
it-evi-spa| Parameter | Value | Parametric value | Share of the parametric value | Reference |
|---|---|---|---|---|
| Nitrate | 4 mg/l | 50 mg/l | 8 % | Single value · Via Alfredo De Luca (scuola Marconi) - Rapporto 20826/25 |
| Escherichia coli (E. coli) | 0 MPN/100 ml | 0/100 ml | — | Single value · Via Alfredo De Luca (scuola Marconi) - Rapporto 20826/25 |
Show all recorded parameters (17 — most recent value per parameter)
Microbiology (2)
| Parameter | Value | Parametric value | Share of the parametric value | Reference |
|---|---|---|---|---|
| Escherichia coli (E. coli) | 0 MPN/100 ml | 0/100 ml | — | Single value · Via Alfredo De Luca (scuola Marconi) - Rapporto 20826/25 |
| Intestinal enterococci | 0 UFC/100 ml | 0/100 ml | — | Single value · Via Alfredo De Luca (scuola Marconi) - Rapporto 20826/25 |
Chemical parameters (2)
| Parameter | Value | Parametric value | Share of the parametric value | Reference |
|---|---|---|---|---|
| Nitrate | 4 mg/l | 50 mg/l | 8 % | Single value · Via Alfredo De Luca (scuola Marconi) - Rapporto 20826/25 |
| Nitrite | <0.05 mg/l below limit of quantification | 0.5 mg/l | < 10 % * | Single value · Via Alfredo De Luca (scuola Marconi) - Rapporto 20826/25 |
* 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 (9)
| Parameter | Value | Parametric value | Share of the parametric value | Reference |
|---|---|---|---|---|
| Ammonium | <0.05 mg/l below limit of quantification | 0.5 mg/l | < 10 % * | Single value · Via Alfredo De Luca (scuola Marconi) - Rapporto 20826/25 |
| Coliform bacteria | 0 MPN/100 ml | 0/100 ml | — | Single value · Via Alfredo De Luca (scuola Marconi) - Rapporto 20826/25 |
| Colony count 22 °C | 0 UFC/ml | senza variazioni anomale | — | Single value · Via Alfredo De Luca (scuola Marconi) - Rapporto 20826/25 |
| Colour | <10 Hazen below limit of quantification | accettabile per i consumatori, senza variazioni anomale | — | Single value · Via Alfredo De Luca (scuola Marconi) - Rapporto 20826/25 |
| Conductivity (25 °C) | 721 microS/cm | 2,500 µS/cm | — | Single value · Via Alfredo De Luca (scuola Marconi) - Rapporto 20826/25 |
| Odour | nessun odore rivelabile | accettabile per i consumatori, senza variazioni anomale | — | Single value · Via Alfredo De Luca (scuola Marconi) - Rapporto 20826/25 |
| pH | 7.7 pH | 6,5–9,5 | — | Single value · Via Alfredo De Luca (scuola Marconi) - Rapporto 20826/25 |
| Taste | accettabile | accettabile per i consumatori, senza variazioni anomale | — | Single value · Via Alfredo De Luca (scuola Marconi) - Rapporto 20826/25 |
| Turbidity | <0.5 NTU below limit of quantification | accettabile per i consumatori, senza variazioni anomale | — | Single value · Via Alfredo De Luca (scuola Marconi) - Rapporto 20826/25 |
* 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 | 0.13 mg/l | — | — | Single value · Via Alfredo De Luca (scuola Marconi) - Rapporto 20826/25 |
Further parameters (3)
| Parameter | Value | Parametric value | Share of the parametric value | Reference |
|---|---|---|---|---|
| Calcium | 120 mg/l | — | — | Single value · Via Alfredo De Luca (scuola Marconi) - Rapporto 20826/25 |
| Magnesium | 30 mg/l | — | — | Single value · Via Alfredo De Luca (scuola Marconi) - Rapporto 20826/25 |
| Total hardness | 43 °F | — | — | Single value · Via Alfredo De Luca (scuola Marconi) - Rapporto 20826/25 |
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.
Via E. Gianturco (scuola Durante) Rapporto 20825/25
it-evi-spa| Parameter | Value | Parametric value | Share of the parametric value | Reference |
|---|---|---|---|---|
| Nitrate | 4 mg/l | 50 mg/l | 8 % | Single value · Via E. Gianturco (scuola Durante) - Rapporto 20825/25 |
| Lead | <1.0 µg/l below limit of quantification | 10 µg/l | < 10 % * | Single value · Via E. Gianturco (scuola Durante) - Rapporto 20825/25 |
| Escherichia coli (E. coli) | 0 MPN/100 ml | 0/100 ml | — | Single value · Via E. Gianturco (scuola Durante) - Rapporto 20825/25 |
| Sulphate | 10 mg/l | 250 mg/l | 4 % | Single value · Via E. Gianturco (scuola Durante) - Rapporto 20825/25 |
| Sodium | 9 mg/l | 200 mg/l | 5 % | Single value · Via E. Gianturco (scuola Durante) - Rapporto 20825/25 |
* 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 (48 — most recent value per parameter)
Microbiology (3)
| Parameter | Value | Parametric value | Share of the parametric value | Reference |
|---|---|---|---|---|
| Escherichia coli (E. coli) | 0 MPN/100 ml | 0/100 ml | — | Single value · Via E. Gianturco (scuola Durante) - Rapporto 20825/25 |
| Intestinal enterococci | 0 UFC/100 ml | 0/100 ml | — | Single value · Via E. Gianturco (scuola Durante) - Rapporto 20825/25 |
| Pseudomonas aeruginosa | 0 MPN/100 ml | — | — | Single value · Via E. Gianturco (scuola Durante) - Rapporto 20825/25 |
Chemical parameters (20)
| 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 % * | Single value · Via E. Gianturco (scuola Durante) - Rapporto 20825/25 |
| Antimony | <1.0 µg/l below limit of quantification | 10 µg/l | < 10 % * | Single value · Via E. Gianturco (scuola Durante) - Rapporto 20825/25 |
| Arsenic | 3.6 µg/l | 10 µg/l | 36 % | Single value · Via E. Gianturco (scuola Durante) - Rapporto 20825/25 |
| Benzene | <0.25 µg/l below limit of quantification | 1 µg/l | < 25 % * | Single value · Via E. Gianturco (scuola Durante) - Rapporto 20825/25 |
| Benzo(a)pyrene | <0.003 µg/l below limit of quantification | 10 ng/l | < 30 % * | Single value · Via E. Gianturco (scuola Durante) - Rapporto 20825/25 |
| Boron | 0.04 mg/l | 1.5 mg/l | 3 % | Single value · Via E. Gianturco (scuola Durante) - Rapporto 20825/25 |
| Cadmium | <1.0 µg/l below limit of quantification | 5 µg/l | < 20 % * | Single value · Via E. Gianturco (scuola Durante) - Rapporto 20825/25 |
| Chromium | <5.0 µg/l below limit of quantification | 50 µg/l | < 10 % * | Single value · Via E. Gianturco (scuola Durante) - Rapporto 20825/25 |
| Copper | <0.03 mg/l below limit of quantification | 2 mg/l | < 2 % * | Single value · Via E. Gianturco (scuola Durante) - Rapporto 20825/25 |
| Cyanide | <5.0 µg/l CN below limit of quantification | 50 µg/l | — | Single value · Via E. Gianturco (scuola Durante) - Rapporto 20825/25 |
| Fluoride | 0.18 mg/l | 1.5 mg/l | 12 % | Single value · Via E. Gianturco (scuola Durante) - Rapporto 20825/25 |
| Lead | <1.0 µg/l below limit of quantification | 10 µg/l | < 10 % * | Single value · Via E. Gianturco (scuola Durante) - Rapporto 20825/25 |
| Mercury | <0.20 µg/l below limit of quantification | 1 µg/l | < 20 % * | Single value · Via E. Gianturco (scuola Durante) - Rapporto 20825/25 |
| Nickel | <1.0 µg/l below limit of quantification | 20 µg/l | < 5 % * | Single value · Via E. Gianturco (scuola Durante) - Rapporto 20825/25 |
| Nitrate | 4 mg/l | 50 mg/l | 8 % | Single value · Via E. Gianturco (scuola Durante) - Rapporto 20825/25 |
| Nitrite | <0.05 mg/l below limit of quantification | 0.5 mg/l | < 10 % * | Single value · Via E. Gianturco (scuola Durante) - Rapporto 20825/25 |
| Selenium | <1.0 µg/l below limit of quantification | 20 µg/l | < 5 % * | Single value · Via E. Gianturco (scuola Durante) - Rapporto 20825/25 |
| Tetrachloroethene | <0.2 µg/l below limit of quantification | — | — | Single value · Via E. Gianturco (scuola Durante) - Rapporto 20825/25 |
| Trichloroethene | <0.2 µg/l below limit of quantification | — | — | Single value · Via E. Gianturco (scuola Durante) - Rapporto 20825/25 |
| Trihalomethanes — Total | 3.0 µg/l | 30 µg/l | 10 % | Single value · Via E. Gianturco (scuola Durante) - Rapporto 20825/25 |
* 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 (18)
| Parameter | Value | Parametric value | Share of the parametric value | Reference |
|---|---|---|---|---|
| Aluminium | <25 µg/l below limit of quantification | 0.2 mg/l | < 12 % * | Single value · Via E. Gianturco (scuola Durante) - Rapporto 20825/25 |
| Ammonium | <0.05 mg/l below limit of quantification | 0.5 mg/l | < 10 % * | Single value · Via E. Gianturco (scuola Durante) - Rapporto 20825/25 |
| Chloride | 12 mg/l | 250 mg/l | 5 % | Single value · Via E. Gianturco (scuola Durante) - Rapporto 20825/25 |
| Clostridium perfringens (including spores) | 0 UFC/100 ml | 0/100 ml | — | Single value · Via E. Gianturco (scuola Durante) - Rapporto 20825/25 |
| Coliform bacteria | 0 MPN/100 ml | 0/100 ml | — | Single value · Via E. Gianturco (scuola Durante) - Rapporto 20825/25 |
| Colony count 22 °C | 0 UFC/ml | senza variazioni anomale | — | Single value · Via E. Gianturco (scuola Durante) - Rapporto 20825/25 |
| Colony count 36 °C | presente UFC/ml | — | — | Single value · Via E. Gianturco (scuola Durante) - Rapporto 20825/25 |
| Colour | <10 Hazen below limit of quantification | accettabile per i consumatori, senza variazioni anomale | — | Single value · Via E. Gianturco (scuola Durante) - Rapporto 20825/25 |
| Conductivity (25 °C) | 700 microS/cm | 2,500 µS/cm | — | Single value · Via E. Gianturco (scuola Durante) - Rapporto 20825/25 |
| Iron | <25 µg/l below limit of quantification | 0.2 mg/l | < 12 % * | Single value · Via E. Gianturco (scuola Durante) - Rapporto 20825/25 |
| Manganese | <5.0 µg/l below limit of quantification | 50 µg/l | < 10 % * | Single value · Via E. Gianturco (scuola Durante) - Rapporto 20825/25 |
| Odour | nessun odore rivelabile | accettabile per i consumatori, senza variazioni anomale | — | Single value · Via E. Gianturco (scuola Durante) - Rapporto 20825/25 |
| pH | 7.2 pH | 6,5–9,5 | — | Single value · Via E. Gianturco (scuola Durante) - Rapporto 20825/25 |
| Sodium | 9 mg/l | 200 mg/l | 5 % | Single value · Via E. Gianturco (scuola Durante) - Rapporto 20825/25 |
| Sulphate | 10 mg/l | 250 mg/l | 4 % | Single value · Via E. Gianturco (scuola Durante) - Rapporto 20825/25 |
| Taste | accettabile | accettabile per i consumatori, senza variazioni anomale | — | Single value · Via E. Gianturco (scuola Durante) - Rapporto 20825/25 |
| Total organic carbon (TOC) | <1.0 mg/l below limit of quantification | senza variazioni anomale | — | Single value · Via E. Gianturco (scuola Durante) - Rapporto 20825/25 |
| Turbidity | <0.5 NTU below limit of quantification | accettabile per i consumatori, senza variazioni anomale | — | Single value · Via E. Gianturco (scuola Durante) - Rapporto 20825/25 |
* 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 | 0.18 mg/l | — | — | Single value · Via E. Gianturco (scuola Durante) - Rapporto 20825/25 |
Further parameters (6)
| Parameter | Value | Parametric value | Share of the parametric value | Reference |
|---|---|---|---|---|
| Calcium | 119 mg/l | — | — | Single value · Via E. Gianturco (scuola Durante) - Rapporto 20825/25 |
| Dry residue | 504 mg/l | — | — | Single value · Via E. Gianturco (scuola Durante) - Rapporto 20825/25 |
| Magnesium | 30 mg/l | — | — | Single value · Via E. Gianturco (scuola Durante) - Rapporto 20825/25 |
| Potassium | <3 mg/l below limit of quantification | — | — | Single value · Via E. Gianturco (scuola Durante) - Rapporto 20825/25 |
| Total hardness | 42 °F | — | — | Single value · Via E. Gianturco (scuola Durante) - Rapporto 20825/25 |
| Vanadium | <5.0 µg/l below limit of quantification | 0.14 mg/l | < 4 % * | Single value · Via E. Gianturco (scuola Durante) - Rapporto 20825/25 |
* 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.
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).