Italy · Comune
Drinking water in Ferrera di Varese
One supply zone, published by ALFA S.r.l.. 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 Ferrera Di Varese
ALFA S.r.l.These values are more than a year old. The most recent analysis the water supplier has published for this zone dates from 28/05/2025. We have no newer values — which is why we show the latest available ones rather than none at all. They say nothing about how the water has changed since then.
| Parameter | Value | Parametric value | Share of the parametric value | Reference |
|---|---|---|---|---|
| Sum of PFAS | 0,0064 ug/l | 0.1 µg/l | 6 % | Maximum · Comune di Ferrera Di Varese · Source [3] |
| Nitrate | 15 mg/l | 50 mg/l | 30 % | Median · Comune di Ferrera Di Varese · Source [1] |
| Lead | < 1 µg/l below limit of quantification | 10 µg/l | < 10 % * | Maximum · Comune di Ferrera Di Varese · Source [1] |
| Escherichia coli (E. coli) | 0 UFC/100ml | 0/100 ml | — | Maximum · Median 0 · Comune di Ferrera Di Varese · Source [1] |
| Sulphate | 11 mg/l | 250 mg/l | 4 % | Median · Comune di Ferrera Di Varese · Source [1] |
| Sodium | 19 mg/l | 200 mg/l | 9 % | Median · Comune di Ferrera Di Varese · Source [1] |
* 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 (59 — most recent value per parameter)
Microbiology (2)
| Parameter | Value | Parametric value | Share of the parametric value | Reference |
|---|---|---|---|---|
| Escherichia coli (E. coli) | 0 UFC/100ml | 0/100 ml | — | Maximum · Median 0 · Comune di Ferrera Di Varese · Source [1] |
| Intestinal enterococci | 1 UFC/100ml | 0/100 ml | above the parametric value — this parameter must not be detectable | Maximum · Median 0 · Comune di Ferrera Di Varese · Source [1] |
An exceedance of a parametric value does not automatically mean a health risk; the statutory parametric values include safety margins. Assessment and any measures are the responsibility of the competent health authority of the respective country.
Chemical parameters (31)
| Parameter | Value | Parametric value | Share of the parametric value | Reference |
|---|---|---|---|---|
| 1,2-dichloroethane | < 0,9 µg/l below limit of quantification | 3 µg/l | < 30 % * | Maximum · Comune di Ferrera Di Varese · Source [1] |
| Alachlor | < 0,01 µg/l below limit of quantification | — | — | Maximum · Comune di Ferrera Di Varese · Source [1] |
| Antimony | < 1 µg/l below limit of quantification | 10 µg/l | < 10 % * | Maximum · Comune di Ferrera Di Varese · Source [1] |
| Arsenic | 1 µg/l | 10 µg/l | 10 % | Median · Comune di Ferrera Di Varese · Source [1] |
| Atrazine | < 0,01 µg/l below limit of quantification | — | — | Maximum · Comune di Ferrera Di Varese · Source [1] |
| Bentazone | < 0,01 µg/l below limit of quantification | — | — | Maximum · Comune di Ferrera Di Varese · Source [1] |
| Benzene | < 0,3 µg/l below limit of quantification | 1 µg/l | < 30 % * | Maximum · Comune di Ferrera Di Varese · Source [1] |
| Boron | < 0,3 mg/l below limit of quantification | 1.5 mg/l | < 20 % * | Maximum · Comune di Ferrera Di Varese · Source [1] |
| Bromodichloromethane | 3 µg/l | — | — | Maximum · Comune di Ferrera Di Varese · Source [1] |
| Cadmium | < 1,0 µg/l below limit of quantification | 5 µg/l | < 20 % * | Maximum · Comune di Ferrera Di Varese · Source [1] |
| Chlorate | 0,1 mg/l | 0,25 — bzw. 0,70 bei Desinfektion mit Chlordioxid | — | Median · Comune di Ferrera Di Varese · Source [2] |
| Chlorite | < 0,05 mg/l below limit of quantification | 0,25 — bzw. 0,70 bei Desinfektion mit Chlordioxid | — | Maximum · Comune di Ferrera Di Varese · Source [2] |
| Chromium | < 5 µg/l below limit of quantification | 50 µg/l | < 10 % * | Maximum · Comune di Ferrera Di Varese · Source [1] |
| Copper | < 0,2 mg/l below limit of quantification | 2 mg/l | < 10 % * | Maximum · Comune di Ferrera Di Varese · Source [1] |
| Dibromochloromethane | 2 µg/l | — | — | Maximum · Comune di Ferrera Di Varese · Source [1] |
| Fluoride | 0,1 mg/l | 1.5 mg/l | 7 % | Median · Comune di Ferrera Di Varese · Source [1] |
| Lead | < 1 µg/l below limit of quantification | 10 µg/l | < 10 % * | Maximum · Comune di Ferrera Di Varese · Source [1] |
| Molinate | < 0,01 µg/l below limit of quantification | — | — | Maximum · Comune di Ferrera Di Varese · Source [1] |
| Nickel | < 2 µg/l below limit of quantification | 20 µg/l | < 10 % * | Maximum · Comune di Ferrera Di Varese · Source [1] |
| Nitrate | 15 mg/l | 50 mg/l | 30 % | Median · Comune di Ferrera Di Varese · Source [1] |
| Nitrite | < 0,05 mg/l below limit of quantification | 0.5 mg/l | < 10 % * | Maximum · Comune di Ferrera Di Varese · Source [1] |
| Propazine | < 0,01 µg/l below limit of quantification | — | — | Maximum · Comune di Ferrera Di Varese · Source [1] |
| Selenium | < 1 µg/l below limit of quantification | 20 µg/l | < 5 % * | Maximum · Comune di Ferrera Di Varese · Source [1] |
| Simazine | < 0,01 µg/l below limit of quantification | — | — | Maximum · Comune di Ferrera Di Varese · Source [1] |
| Terbuthylazine | < 0,01 µg/l below limit of quantification | — | — | Maximum · Comune di Ferrera Di Varese · Source [1] |
| Tetrachloroethene | < 1 µg/l below limit of quantification | — | — | Maximum · Comune di Ferrera Di Varese · Source [1] |
| Tetrachloroethene and Trichloroethene (sum) | < 1 µg/l below limit of quantification | 10 µg/l | < 10 % * | Maximum · Comune di Ferrera Di Varese · Source [3] |
| Tribromomethane (bromoform) | < 1 µg/l below limit of quantification | — | — | Maximum · Comune di Ferrera Di Varese · Source [1] |
| Trichloroethene | < 1 µg/l below limit of quantification | — | — | Maximum · Comune di Ferrera Di Varese · Source [1] |
| Trichloromethane (chloroform) | 4 µg/l | — | — | Maximum · Comune di Ferrera Di Varese · Source [1] |
| Trihalomethanes — Total | 9 µg/l | 30 µg/l | 30 % | Maximum · Comune di Ferrera Di Varese · Source [1] |
* 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 (5)
| Parameter | Value | Parametric value | Share of the parametric value | Reference |
|---|---|---|---|---|
| HFPO-DA (GenX) | < 0,0010 µg/l below limit of quantification | — | — | Maximum · Comune di Ferrera Di Varese · Source [3] |
| Perfluorodecane sulfonic acid (PFDS) | < 0,0010 µg/l below limit of quantification | — | — | Maximum · Comune di Ferrera Di Varese · Source [3] |
| Sum of 4 PFAS | 0,004 ug/l | 20 ng/l | 20 % | Maximum · Comune di Ferrera Di Varese · Source [3] |
| Sum of PFAS | 0,0064 ug/l | 0.1 µg/l | 6 % | Maximum · Comune di Ferrera Di Varese · Source [3] |
| Trifluoroacetic acid (TFA) | 1 µg/l | 10 µg/l | 10 % | Maximum · Comune di Ferrera Di Varese · Source [3] |
Indicator parameters (13)
| Parameter | Value | Parametric value | Share of the parametric value | Reference |
|---|---|---|---|---|
| Aluminium | < 20 µg/l below limit of quantification | 0.2 mg/l | < 10 % * | Maximum · Comune di Ferrera Di Varese · Source [1] |
| Ammonium | < 0,13 mg/l below limit of quantification | 0.5 mg/l | < 26 % * | Maximum · Comune di Ferrera Di Varese · Source [1] |
| Chloride | 31 mg/l | 250 mg/l | 12 % | Median · Comune di Ferrera Di Varese · Source [1] |
| Clostridium perfringens (including spores) | 0 UFC/100ml | 0/100 ml | — | Maximum · Median 0 · Comune di Ferrera Di Varese · Source [1] |
| Coliform bacteria | 4 UFC/100ml | 0/100 ml | above the parametric value — this parameter must not be detectable | Maximum · Median 0 · Comune di Ferrera Di Varese · Source [1] |
| Colony count 22 °C | 0 UFC/1ml | senza variazioni anomale | — | Median · Comune di Ferrera Di Varese · Source [1] |
| Iron | < 20 µg/l below limit of quantification | 0.2 mg/l | < 10 % * | Maximum · Comune di Ferrera Di Varese · Source [1] |
| Manganese | < 5 µg/l below limit of quantification | 50 µg/l | < 10 % * | Maximum · Comune di Ferrera Di Varese · Source [1] |
| pH | 7,2 pH_unit | 6,5–9,5 | — | Median · Comune di Ferrera Di Varese · Source [1] |
| Sodium | 19 mg/l | 200 mg/l | 9 % | Median · Comune di Ferrera Di Varese · Source [1] |
| Sulphate | 11 mg/l | 250 mg/l | 4 % | Median · Comune di Ferrera Di Varese · Source [1] |
| Total organic carbon (TOC) | < 0,3 mg/l below limit of quantification | senza variazioni anomale | — | Maximum · Comune di Ferrera Di Varese · Source [3] |
| Turbidity | 0,27 NTU | accettabile per i consumatori, senza variazioni anomale | — | Median · Comune di Ferrera Di Varese · Source [1] |
* 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.
An exceedance of a parametric value does not automatically mean a health risk; the statutory parametric values include safety margins. Assessment and any measures are the responsibility of the competent health authority of the respective country.
Further parameters (8)
| Parameter | Value | Parametric value | Share of the parametric value | Reference |
|---|---|---|---|---|
| Barium | < 2 mg/l below limit of quantification | — | — | Maximum · Comune di Ferrera Di Varese · Source [1] |
| Calcium | 59 mg/l | — | — | Median · Comune di Ferrera Di Varese · Source [1] |
| Dry residue | 387 mg/l | — | — | Median · Comune di Ferrera Di Varese · Source [1] |
| Magnesium | 32 mg/l | — | — | Median · Comune di Ferrera Di Varese · Source [1] |
| Potassium | 4 mg/l | — | — | Median · Comune di Ferrera Di Varese · Source [1] |
| Total hardness | 28,1 ° f | — | — | Median · Comune di Ferrera Di Varese · Source [1] |
| Vanadium | < 10 µg/l below limit of quantification | 0.14 mg/l | < 7 % * | Maximum · Comune di Ferrera Di Varese · Source [1] |
| Zinc | 25 µg/l | — | — | Maximum · Comune di Ferrera Di Varese · Source [1] |
* 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).