Drinking water in Sissach
One supply zone, water supplier: Wasserversorgung Sissach (WVS).
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.
Gemeinde Sissach
Wasserversorgung Sissach (WVS)Assigned 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 | 14.3 mg/l | 40 mg/l | 36 % | Mean · Gemeinde Sissach |
| Escherichia coli (E. coli) | nn not detectable Unit not stated in the document | 0/100 ml | — | Maximum · Median nn · Gemeinde Sissach |
| Sulphate | 7.21 mg/l | — | — | Mean · Gemeinde Sissach |
| Sodium | 12.6 mg/l | 200 mg/l | 6 % | Mean · Gemeinde Sissach |
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 | 36 KBE/ml | 300 1/ml | — | Mean · Gemeinde Sissach |
| Escherichia coli (E. coli) | nn not detectable Unit not stated in the document | 0/100 ml | — | Maximum · Median nn · Gemeinde Sissach |
| Intestinal enterococci | nn not detectable Unit not stated in the document | 0/100 ml | — | Maximum · Median nn · Gemeinde Sissach |
Chemical parameters (2)
| Parameter | Value | Parametric value | Share of the parametric value | Reference |
|---|---|---|---|---|
| Fluoride | 0.17 mg/l | 1.5 mg/l | 11 % | Mean · Gemeinde Sissach |
| Nitrate | 14.3 mg/l | 40 mg/l | 36 % | Mean · Gemeinde Sissach |
Indicator parameters (9)
| Parameter | Value | Parametric value | Share of the parametric value | Reference |
|---|---|---|---|---|
| Chloride | 16.9 mg/l | — | — | Mean · Gemeinde Sissach |
| Conductivity (25 °C) | 679 µS/cm | — | — | Mean · Gemeinde Sissach |
| Iron | 0.017 mg/l | 0.2 mg/l | 9 % | Mean · Gemeinde Sissach |
| Manganese | 0.004 mg/l | 50 µg/l | 8 % | Mean · Gemeinde Sissach |
| pH | 7.4 | — | — | Mean · Gemeinde Sissach |
| Sodium | 12.6 mg/l | 200 mg/l | 6 % | Mean · Gemeinde Sissach |
| Sulphate | 7.21 mg/l | — | — | Mean · Gemeinde Sissach |
| Temperature | 13.5 °C | — | — | Mean · Gemeinde Sissach |
| Turbidity | 0.09 TE/F | — | — | Mean · Gemeinde Sissach |
Further parameters (5)
| Parameter | Value | Parametric value | Share of the parametric value | Reference |
|---|---|---|---|---|
| Calcium | 116 mg/l | — | — | Mean · Gemeinde Sissach |
| Dissolved organic carbon (DOC) | 0.8 mg/l | — | — | Mean · Gemeinde Sissach |
| Magnesium | 11.9 mg/l | — | — | Mean · Gemeinde Sissach |
| Potassium | 2.8 mg/l | — | — | Mean · Gemeinde Sissach |
| Total hardness | 33.9 °fH | — | — | Mean · Gemeinde Sissach |
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: 4450
Frequently asked questions about drinking water in Sissach
- How hard is the water in Sissach?
- Wasserversorgung Sissach (WVS) publishes a total hardness of 33.9 °fH for the supply zone Gemeinde Sissach — that corresponds to 19 °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 Sissach?
- Wasserversorgung Sissach (WVS) publishes a nitrate value of 14.3 mg/l for the supply zone Gemeinde Sissach. The statutory parametric value is 40 mg/l; the measured value represents 36 % of the parametric value. Basis: 2025, retrieved on 07/08/2026.
- Who supplies the drinking water in Sissach?
- Wasserversorgung Sissach (WVS). The values shown here come from the supply zone Gemeinde Sissach 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.