Drinking water in Wettswil
One supply zone, water supplier: Wasserversorgung Wettswil a.A..
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.
Wettswil a.A.
Wasserversorgung Wettswil a.A.Assigned via the water supplier — the exact supply zone boundary within the postcode is not yet linked.
These values are more than a year old. The most recent analysis the water supplier has published for this zone dates from 31/12/2023. 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 |
|---|---|---|---|---|
| Nitrate | 8.7 mg/l | 40 mg/l | 22 % | Mean · Wettswil a.A. |
| Escherichia coli (E. coli) | 0 KBE/100ml | 0/100 ml | — | Maximum · Median 0 · Wettswil a.A. |
| Sulphate | 10.8 mg/l | — | — | Mean · Wettswil a.A. |
| Sodium | 6.1 mg/l | 200 mg/l | 3 % | Mean · Wettswil a.A. |
Show all recorded parameters (17 — most recent value per parameter)
Microbiology (3)
| Parameter | Value | Parametric value | Share of the parametric value | Reference |
|---|---|---|---|---|
| Aerobic mesophilic bacteria | 180 KBE/ml | 300 1/ml | — | Mean · Wettswil a.A. |
| Escherichia coli (E. coli) | 0 KBE/100ml | 0/100 ml | — | Maximum · Median 0 · Wettswil a.A. |
| Intestinal enterococci | 0 KBE/100ml | 0/100 ml | — | Maximum · Median 0 · Wettswil a.A. |
Chemical parameters (2)
| Parameter | Value | Parametric value | Share of the parametric value | Reference |
|---|---|---|---|---|
| Fluoride | < 0.1 mg/l below limit of quantification | 1.5 mg/l | < 7 % * | Mean · Wettswil a.A. |
| Nitrate | 8.7 mg/l | 40 mg/l | 22 % | Mean · Wettswil a.A. |
* 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 (7)
| Parameter | Value | Parametric value | Share of the parametric value | Reference |
|---|---|---|---|---|
| Chloride | 9.1 mg/l | — | — | Mean · Wettswil a.A. |
| Conductivity (25 °C) | 648 µS/cm | — | — | Mean · Wettswil a.A. |
| pH | 7.51 | — | — | Mean · Wettswil a.A. |
| Sodium | 6.1 mg/l | 200 mg/l | 3 % | Mean · Wettswil a.A. |
| Sulphate | 10.8 mg/l | — | — | Mean · Wettswil a.A. |
| Temperature | 8.3 °C | — | — | Mean · Wettswil a.A. |
| Turbidity | < 0.1 TE/F below limit of quantification | — | — | Mean · Wettswil a.A. |
Further parameters (5)
| Parameter | Value | Parametric value | Share of the parametric value | Reference |
|---|---|---|---|---|
| Calcium | 87.9 mg/l | — | — | Mean · Wettswil a.A. |
| Dissolved organic carbon (DOC) | 0.69 mg/l | — | — | Mean · Wettswil a.A. |
| Magnesium | 30.9 mg/l | — | — | Mean · Wettswil a.A. |
| Potassium | 0.9 mg/l | — | — | Mean · Wettswil a.A. |
| Total hardness | 34.6 °fH | — | — | Mean · Wettswil a.A. |
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.
Postcodes in this zone: 8907
Frequently asked questions about drinking water in Wettswil
- How hard is the water in Wettswil?
- Wasserversorgung Wettswil a.A. publishes a total hardness of 34.6 °fH for the supply zone Wettswil a.A. — that corresponds to 19.4 °dH. The hardness range is a classification under the German Detergents and Cleaning Products Act (soft below 8,4 °dH, medium 8,4 to 14 °dH, hard above that) and not a quality verdict — it indicates how much calcium and magnesium is dissolved in the water. Basis: 2023, retrieved on 07/08/2026.
- How much nitrate is in the drinking water in Wettswil?
- Wasserversorgung Wettswil a.A. publishes a nitrate value of 8.7 mg/l for the supply zone Wettswil a.A.. The statutory parametric value is 40 mg/l; the measured value represents 22 % of the parametric value. Basis: 2023, retrieved on 07/08/2026.
- Who supplies the drinking water in Wettswil?
- Wasserversorgung Wettswil a.A.. The values shown here come from the supply zone Wettswil a.A. and apply to the water the supplier delivers. What happens between the building connection and the tap — in old lead pipes, for example — is not covered by these analyses; information on that is provided by owners, the health authority or an examination by an accredited laboratory.
General questions — how current the data is, limit of quantification, parametric values, who is behind this site — are answered under Questions & answers.