Drinking water in Leysin
3 supply zones — values can differ depending on the district. Below is the zone with the most documented parameters, the others collapsed underneath. To determine the exact match, look up the postcode.
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.
Commune de Leysin - Source de Bryon
Commune de LeysinAssigned 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 | 0.91 mg/l | 40 mg/l | 2 % | Mean · Commune de Leysin - Source de Bryon |
| Escherichia coli (E. coli) | 4 KBE/100ml | 0/100 ml | above the parametric value — this parameter must not be detectable | Maximum · Median 0 · Commune de Leysin - Source de Bryon |
| Sulphate | 5.37 mg/l | — | — | Mean · Commune de Leysin - Source de Bryon |
| Sodium | < 1 mg/l below limit of quantification | 200 mg/l | < 0.5 % * | Mean · Commune de Leysin - Source de Bryon |
* 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.
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 | 9 KBE/ml | 300 1/ml | — | Mean · Commune de Leysin - Source de Bryon |
| Escherichia coli (E. coli) | 4 KBE/100ml | 0/100 ml | above the parametric value — this parameter must not be detectable | Maximum · Median 0 · Commune de Leysin - Source de Bryon |
| Intestinal enterococci | 0 KBE/100ml | 0/100 ml | — | Maximum · Median 0 · Commune de Leysin - Source de Bryon |
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 (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 · Commune de Leysin - Source de Bryon |
| Nitrate | 0.91 mg/l | 40 mg/l | 2 % | Mean · Commune de Leysin - Source de Bryon |
* 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 | 0.22 mg/l | — | — | Mean · Commune de Leysin - Source de Bryon |
| Conductivity (25 °C) | 231 µS/cm | — | — | Mean · Commune de Leysin - Source de Bryon |
| Iron | < 0.1 mg/l below limit of quantification | 0.2 mg/l | < 50 % * | Mean · Commune de Leysin - Source de Bryon |
| Manganese | < 0.01 mg/l below limit of quantification | 50 µg/l | < 20 % * | Mean · Commune de Leysin - Source de Bryon |
| Oxidisability | < 1.65 mg KMnO4/l below limit of quantification | — | — | Mean · Commune de Leysin - Source de Bryon |
| pH | 7.72 | — | — | Mean · Commune de Leysin - Source de Bryon |
| Sodium | < 1 mg/l below limit of quantification | 200 mg/l | < 0.5 % * | Mean · Commune de Leysin - Source de Bryon |
| Sulphate | 5.37 mg/l | — | — | Mean · Commune de Leysin - Source de Bryon |
| Temperature | 6.3 °C | — | — | Mean · Commune de Leysin - Source de Bryon |
| Turbidity | 0.87 TE/F | — | — | Mean · Commune de Leysin - Source de Bryon |
* 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 (6)
| Parameter | Value | Parametric value | Share of the parametric value | Reference |
|---|---|---|---|---|
| Calcium | 40.35 mg/l | — | — | Mean · Commune de Leysin - Source de Bryon |
| Dissolved organic carbon (DOC) | 0.8 mg/l | — | — | Mean · Commune de Leysin - Source de Bryon |
| Hydrogen carbonate | 117.98 mg/l | — | — | Mean · Commune de Leysin - Source de Bryon |
| Magnesium | 3.72 mg/l | — | — | Mean · Commune de Leysin - Source de Bryon |
| Potassium | < 5 mg/l below limit of quantification | — | — | Mean · Commune de Leysin - Source de Bryon |
| Total hardness | 11.95 °fH | — | — | Mean · Commune de Leysin - Source de Bryon |
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: 1854
Show 2 more supply zones
Commune de Leysin - Source de Coussy-Loudze
Commune de LeysinAssigned 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 | 1.94 mg/l | 40 mg/l | 5 % | Mean · Commune de Leysin - Source de Coussy-Loudze |
| Escherichia coli (E. coli) | 0 KBE/100ml | 0/100 ml | — | Maximum · Median 0 · Commune de Leysin - Source de Coussy-Loudze |
| Sulphate | 39.2 mg/l | — | — | Mean · Commune de Leysin - Source de Coussy-Loudze |
| Sodium | < 1 mg/l below limit of quantification | 200 mg/l | < 0.5 % * | Mean · Commune de Leysin - Source de Coussy-Loudze |
* 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 (21 — most recent value per parameter)
Microbiology (3)
| Parameter | Value | Parametric value | Share of the parametric value | Reference |
|---|---|---|---|---|
| Aerobic mesophilic bacteria | 8 KBE/ml | 300 1/ml | — | Mean · Commune de Leysin - Source de Coussy-Loudze |
| Escherichia coli (E. coli) | 0 KBE/100ml | 0/100 ml | — | Maximum · Median 0 · Commune de Leysin - Source de Coussy-Loudze |
| Intestinal enterococci | 0 KBE/100ml | 0/100 ml | — | Maximum · Median 0 · Commune de Leysin - Source de Coussy-Loudze |
Chemical parameters (2)
| Parameter | Value | Parametric value | Share of the parametric value | Reference |
|---|---|---|---|---|
| Fluoride | 0.139 mg/l | 1.5 mg/l | 9 % | Mean · Commune de Leysin - Source de Coussy-Loudze |
| Nitrate | 1.94 mg/l | 40 mg/l | 5 % | Mean · Commune de Leysin - Source de Coussy-Loudze |
Indicator parameters (10)
| Parameter | Value | Parametric value | Share of the parametric value | Reference |
|---|---|---|---|---|
| Chloride | 0.62 mg/l | — | — | Mean · Commune de Leysin - Source de Coussy-Loudze |
| Conductivity (25 °C) | 291 µS/cm | — | — | Mean · Commune de Leysin - Source de Coussy-Loudze |
| Iron | < 0.1 mg/l below limit of quantification | 0.2 mg/l | < 50 % * | Mean · Commune de Leysin - Source de Coussy-Loudze |
| Manganese | < 0.1 mg/l below limit of quantification | 50 µg/l | cannot be assessed — the limit of quantification of the measurement is above the parametric value | Mean · Commune de Leysin - Source de Coussy-Loudze |
| Oxidisability | 1.706 mg KMnO4/l | — | — | Mean · Commune de Leysin - Source de Coussy-Loudze |
| pH | 7.39 | — | — | Mean · Commune de Leysin - Source de Coussy-Loudze |
| Sodium | < 1 mg/l below limit of quantification | 200 mg/l | < 0.5 % * | Mean · Commune de Leysin - Source de Coussy-Loudze |
| Sulphate | 39.2 mg/l | — | — | Mean · Commune de Leysin - Source de Coussy-Loudze |
| Temperature | 8.2 °C | — | — | Mean · Commune de Leysin - Source de Coussy-Loudze |
| Turbidity | 0.65 TE/F | — | — | Mean · Commune de Leysin - Source de Coussy-Loudze |
* 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 (6)
| Parameter | Value | Parametric value | Share of the parametric value | Reference |
|---|---|---|---|---|
| Calcium | 45.33 mg/l | — | — | Mean · Commune de Leysin - Source de Coussy-Loudze |
| Dissolved organic carbon (DOC) | 0.88 mg/l | — | — | Mean · Commune de Leysin - Source de Coussy-Loudze |
| Hydrogen carbonate | 121.18 mg/l | — | — | Mean · Commune de Leysin - Source de Coussy-Loudze |
| Magnesium | 9.96 mg/l | — | — | Mean · Commune de Leysin - Source de Coussy-Loudze |
| Potassium | < 5 mg/l below limit of quantification | — | — | Mean · Commune de Leysin - Source de Coussy-Loudze |
| Total hardness | 14.96 °fH | — | — | Mean · Commune de Leysin - Source de Coussy-Loudze |
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: 1854
Commune de Leysin - Source des Deux-Rochers
Commune de LeysinAssigned 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 | 1.59 mg/l | 40 mg/l | 4 % | Mean · Commune de Leysin - Source des Deux-Rochers |
| Escherichia coli (E. coli) | 0 KBE/100ml | 0/100 ml | — | Maximum · Median 0 · Commune de Leysin - Source des Deux-Rochers |
| Sulphate | 9.38 mg/l | — | — | Mean · Commune de Leysin - Source des Deux-Rochers |
| Sodium | < 1 mg/l below limit of quantification | 200 mg/l | < 0.5 % * | Mean · Commune de Leysin - Source des Deux-Rochers |
* 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 (21 — most recent value per parameter)
Microbiology (3)
| Parameter | Value | Parametric value | Share of the parametric value | Reference |
|---|---|---|---|---|
| Aerobic mesophilic bacteria | 0.9 KBE/ml | 300 1/ml | — | Mean · Commune de Leysin - Source des Deux-Rochers |
| Escherichia coli (E. coli) | 0 KBE/100ml | 0/100 ml | — | Maximum · Median 0 · Commune de Leysin - Source des Deux-Rochers |
| Intestinal enterococci | 0 KBE/100ml | 0/100 ml | — | Maximum · Median 0 · Commune de Leysin - Source des Deux-Rochers |
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 · Commune de Leysin - Source des Deux-Rochers |
| Nitrate | 1.59 mg/l | 40 mg/l | 4 % | Mean · Commune de Leysin - Source des Deux-Rochers |
* 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 | 0.19 mg/l | — | — | Mean · Commune de Leysin - Source des Deux-Rochers |
| Conductivity (25 °C) | 214.7 µS/cm | — | — | Mean · Commune de Leysin - Source des Deux-Rochers |
| Iron | < 0.1 mg/l below limit of quantification | 0.2 mg/l | < 50 % * | Mean · Commune de Leysin - Source des Deux-Rochers |
| Manganese | < 0.02 mg/l below limit of quantification | 50 µg/l | < 40 % * | Mean · Commune de Leysin - Source des Deux-Rochers |
| Oxidisability | < 1 mg KMnO4/l below limit of quantification | — | — | Mean · Commune de Leysin - Source des Deux-Rochers |
| pH | 7.47 | — | — | Mean · Commune de Leysin - Source des Deux-Rochers |
| Sodium | < 1 mg/l below limit of quantification | 200 mg/l | < 0.5 % * | Mean · Commune de Leysin - Source des Deux-Rochers |
| Sulphate | 9.38 mg/l | — | — | Mean · Commune de Leysin - Source des Deux-Rochers |
| Temperature | 7.44 °C | — | — | Mean · Commune de Leysin - Source des Deux-Rochers |
| Turbidity | 0.67 TE/F | — | — | Mean · Commune de Leysin - Source des Deux-Rochers |
* 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 (6)
| Parameter | Value | Parametric value | Share of the parametric value | Reference |
|---|---|---|---|---|
| Calcium | 52.09 mg/l | — | — | Mean · Commune de Leysin - Source des Deux-Rochers |
| Dissolved organic carbon (DOC) | 0.55 mg/l | — | — | Mean · Commune de Leysin - Source des Deux-Rochers |
| Hydrogen carbonate | 155.01 mg/l | — | — | Mean · Commune de Leysin - Source des Deux-Rochers |
| Magnesium | 4 mg/l | — | — | Mean · Commune de Leysin - Source des Deux-Rochers |
| Potassium | < 5 mg/l below limit of quantification | — | — | Mean · Commune de Leysin - Source des Deux-Rochers |
| Total hardness | 14.92 °fH | — | — | Mean · Commune de Leysin - Source des Deux-Rochers |
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: 1854
Frequently asked questions about drinking water in Leysin
- How hard is the water in Leysin?
- Commune de Leysin publishes a total hardness of 11.95 °fH for the supply zone Commune de Leysin - Source de Bryon — that corresponds to 6.7 °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 Leysin?
- Commune de Leysin publishes a nitrate value of 0.91 mg/l for the supply zone Commune de Leysin - Source de Bryon. The statutory parametric value is 40 mg/l; the measured value represents 2 % of the parametric value. Basis: 2025, retrieved on 07/08/2026.
- Who supplies the drinking water in Leysin?
- Commune de Leysin. The values shown here come from the supply zone Commune de Leysin - Source de Bryon 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.