Drinking water in Sempach
One supply zone, water supplier: aquaregio ag.
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.
Sempach
aquaregio agAssigned 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 | 2.48 mg/l | 40 mg/l | 6 % | Mean · Sempach |
| Escherichia coli (E. coli) | nn not detectable Unit not stated in the document | 0/100 ml | — | Maximum · Median nn · Sempach |
| Sulphate | 10.07 mg/l | — | — | Mean · Sempach |
| Sodium | 10.25 mg/l | 200 mg/l | 5 % | Mean · Sempach |
Show all recorded parameters (21 — most recent value per parameter)
Microbiology (3)
| Parameter | Value | Parametric value | Share of the parametric value | Reference |
|---|---|---|---|---|
| Aerobic mesophilic bacteria | 1 KBE/ml | 300 1/ml | — | Mean · Sempach |
| Escherichia coli (E. coli) | nn not detectable Unit not stated in the document | 0/100 ml | — | Maximum · Median nn · Sempach |
| Intestinal enterococci | nn not detectable Unit not stated in the document | 0/100 ml | — | Maximum · Median nn · Sempach |
Chemical parameters (1)
| Parameter | Value | Parametric value | Share of the parametric value | Reference |
|---|---|---|---|---|
| Nitrate | 2.48 mg/l | 40 mg/l | 6 % | Mean · Sempach |
Metabolites (2)
| Parameter | Value | Parametric value | Share of the parametric value | Reference |
|---|---|---|---|---|
| Chlorothalonil metabolite R417888 | < 0.025 µg/l below limit of quantification | 0.1 µg/l | < 25 % * | Mean · Sempach |
| Chlorothalonil metabolite R471811 | 0.084 µg/l | 0.1 µg/l | 84 % | Mean · Sempach |
* 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 (10)
| Parameter | Value | Parametric value | Share of the parametric value | Reference |
|---|---|---|---|---|
| Chloride | 15.42 mg/l | — | — | Mean · Sempach |
| Conductivity (25 °C) | 317.16 µS/cm | — | — | Mean · Sempach |
| Iron | < 0.02 mg/l below limit of quantification | 0.2 mg/l | < 10 % * | Mean · Sempach |
| Manganese | < 0.01 mg/l below limit of quantification | 50 µg/l | < 20 % * | Mean · Sempach |
| Oxidisability | 2.42 mg KMnO4/l | — | — | Mean · Sempach |
| pH | 8.03 | — | — | Mean · Sempach |
| Sodium | 10.25 mg/l | 200 mg/l | 5 % | Mean · Sempach |
| Sulphate | 10.07 mg/l | — | — | Mean · Sempach |
| Temperature | 10.68 °C | — | — | Mean · Sempach |
| Turbidity | 0.42 TE/F | — | — | Mean · Sempach |
* 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.
Further parameters (5)
| Parameter | Value | Parametric value | Share of the parametric value | Reference |
|---|---|---|---|---|
| Calcium | 46.85 mg/l | — | — | Mean · Sempach |
| Carbonate hardness | 12.25 °fH | — | — | Mean · Sempach |
| Magnesium | 6.31 mg/l | — | — | Mean · Sempach |
| Potassium | 3 mg/l | — | — | Mean · Sempach |
| Total hardness | 14.3 °fH | — | — | Mean · Sempach |
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: 6204
Frequently asked questions about drinking water in Sempach
- How hard is the water in Sempach?
- aquaregio ag publishes a total hardness of 14.3 °fH for the supply zone Sempach — that corresponds to 8 °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 Sempach?
- aquaregio ag publishes a nitrate value of 2.48 mg/l for the supply zone Sempach. The statutory parametric value is 40 mg/l; the measured value represents 6 % of the parametric value. Basis: 2025, retrieved on 07/08/2026.
- Who supplies the drinking water in Sempach?
- aquaregio ag. The values shown here come from the supply zone Sempach 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.