Drinking water in Bassersdorf
One supply zone, water supplier: Wasserversorgung Bassersdorf.
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.
Bassersdorf und Baltenswil
Wasserversorgung BassersdorfAssigned via the water supplier — the exact supply zone boundary within the postcode is not yet linked.
| Parameter | Value | Parametric value | Share of the parametric value | Reference |
|---|---|---|---|---|
| Nitrate | 18.2 mg/l | 40 mg/l | 46 % | Mean · Bassersdorf und Baltenswil |
| Escherichia coli (E. coli) | 0 KBE/100ml | 0/100 ml | — | Maximum · Median 0 · Bassersdorf und Baltenswil |
| Sulphate | 18.7 mg/l | — | — | Mean · Bassersdorf und Baltenswil |
| Sodium | 12.6 mg/l | 200 mg/l | 6 % | Mean · Bassersdorf und Baltenswil |
Show all recorded parameters (19 — most recent value per parameter)
Microbiology (3)
| Parameter | Value | Parametric value | Share of the parametric value | Reference |
|---|---|---|---|---|
| Aerobic mesophilic bacteria | 14 KBE/ml | 300 1/ml | — | Mean · Bassersdorf und Baltenswil |
| Escherichia coli (E. coli) | 0 KBE/100ml | 0/100 ml | — | Maximum · Median 0 · Bassersdorf und Baltenswil |
| Intestinal enterococci | 0 KBE/100ml | 0/100 ml | — | Maximum · Median 0 · Bassersdorf und Baltenswil |
Chemical parameters (2)
| Parameter | Value | Parametric value | Share of the parametric value | Reference |
|---|---|---|---|---|
| Fluoride | 0.1 mg/l above | 1.5 mg/l | 7 % | Mean · Bassersdorf und Baltenswil |
| Nitrate | 18.2 mg/l | 40 mg/l | 46 % | Mean · Bassersdorf und Baltenswil |
PFAS (3)
| Parameter | Value | Parametric value | Share of the parametric value | Reference |
|---|---|---|---|---|
| Perfluorohexane sulfonic acid (PFHxS) | < 0.001 µg/l below limit of quantification | 0.3 µg/l | < 0.3 % * | Mean · Bassersdorf und Baltenswil |
| Perfluorooctanesulfonic acid (PFOS) | 0.0025 µg/l | 0.3 µg/l | 0.8 % | Mean · Bassersdorf und Baltenswil |
| Perfluorooctanoic acid (PFOA) | 0.002 µg/l | 0.5 µg/l | 0.4 % | Mean · Bassersdorf und Baltenswil |
* 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.
Metabolites (2)
| Parameter | Value | Parametric value | Share of the parametric value | Reference |
|---|---|---|---|---|
| Chlorothalonil metabolite R417888 | 0.041 µg/l | 0.1 µg/l | 41 % | Mean · Bassersdorf und Baltenswil |
| Chlorothalonil metabolite R471811 | 0.128 µg/l | 0.1 µg/l | 128 % Mean above the parametric value | Mean · Bassersdorf und Baltenswil |
Annual means and medians are not individual measured values, but the parametric values apply per sample. If a mean lies above it, at least one individual sample was above it — the mean does not say how many, or by how much. That is why this is not reported here as an exceedance of the parametric value. What counts remains the water supplier's publication, which each row links to.
Indicator parameters (5)
| Parameter | Value | Parametric value | Share of the parametric value | Reference |
|---|---|---|---|---|
| Chloride | 17.1 mg/l | — | — | Mean · Bassersdorf und Baltenswil |
| Oxidisability | 0.76 mg KMnO4/l | — | — | Mean · Bassersdorf und Baltenswil |
| Sodium | 12.6 mg/l | 200 mg/l | 6 % | Mean · Bassersdorf und Baltenswil |
| Sulphate | 18.7 mg/l | — | — | Mean · Bassersdorf und Baltenswil |
| Temperature | 13.1 °C | — | — | Mean · Bassersdorf und Baltenswil |
Further parameters (4)
| Parameter | Value | Parametric value | Share of the parametric value | Reference |
|---|---|---|---|---|
| Calcium | 105 mg/l | — | — | Mean · Bassersdorf und Baltenswil |
| Magnesium | 18.3 mg/l | — | — | Mean · Bassersdorf und Baltenswil |
| Potassium | 1.2 mg/l | — | — | Mean · Bassersdorf und Baltenswil |
| Total hardness | 33.7 °fH | — | — | Mean · Bassersdorf und Baltenswil |
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: 8303
Frequently asked questions about drinking water in Bassersdorf
- How hard is the water in Bassersdorf?
- Wasserversorgung Bassersdorf publishes a total hardness of 33.7 °fH for the supply zone Bassersdorf und Baltenswil — that corresponds to 18.9 °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: 2025, retrieved on 07/08/2026.
- How much nitrate is in the drinking water in Bassersdorf?
- Wasserversorgung Bassersdorf publishes a nitrate value of 18.2 mg/l for the supply zone Bassersdorf und Baltenswil. The statutory parametric value is 40 mg/l; the measured value represents 46 % of the parametric value. Basis: 2025, retrieved on 07/08/2026.
- Who supplies the drinking water in Bassersdorf?
- Wasserversorgung Bassersdorf. The values shown here come from the supply zone Bassersdorf und Baltenswil 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.