Drinking water in Orsières
One supply zone, water supplier: Service des eaux d'Orsières.
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.
1897 - Mayens d'Arpette (ORS42) - Réservoir d'Arpettaz
Service des eaux d'OrsièresAssigned 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 | 1.3 mg/L | 40 mg/l | 3 % | Single value |
| Sulphate | 1.8 mg/L | — | — | Single value |
| Sodium | 1.0 mg/L | 200 mg/l | 0.5 % | Single value |
Show all recorded parameters (11 — most recent value per parameter)
Chemical parameters (1)
| Parameter | Value | Parametric value | Share of the parametric value | Reference |
|---|---|---|---|---|
| Nitrate | 1.3 mg/L | 40 mg/l | 3 % | Single value |
Indicator parameters (6)
| Parameter | Value | Parametric value | Share of the parametric value | Reference |
|---|---|---|---|---|
| Chloride | 0.30 mg/L | — | — | Single value |
| pH | 7.2 | — | — | Single value |
| Sodium | 1.0 mg/L | 200 mg/l | 0.5 % | Single value |
| Sulphate | 1.8 mg/L | — | — | Single value |
| Total organic carbon (TOC) | < 0.5 mg/L below limit of quantification | — | — | Single value |
| Turbidity | < 0.2 UT/F below limit of quantification | — | — | Single value |
Further parameters (4)
| Parameter | Value | Parametric value | Share of the parametric value | Reference |
|---|---|---|---|---|
| Calcium | 4.6 mg/L | — | — | Single value |
| Carbonate hardness | 1.4 °F | — | — | Single value |
| Magnesium | 0.6 mg/L | — | — | Single value |
| Total hardness | 1.3 °F | — | — | Single value |
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: 1937
Frequently asked questions about drinking water in Orsières
- How hard is the water in Orsières?
- Service des eaux d'Orsières publishes a total hardness of 1.3 °F for the supply zone 1897 - Mayens d'Arpette (ORS42) - Réservoir d'Arpettaz — that corresponds to 0.7 °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: 18 juin 2026, retrieved on 12/08/2026.
- How much nitrate is in the drinking water in Orsières?
- Service des eaux d'Orsières publishes a nitrate value of 1.3 mg/L for the supply zone 1897 - Mayens d'Arpette (ORS42) - Réservoir d'Arpettaz. The statutory parametric value is 40 mg/l; the measured value represents 3 % of the parametric value. Basis: 18 juin 2026, retrieved on 12/08/2026.
- Who supplies the drinking water in Orsières?
- Service des eaux d'Orsières. The values shown here come from the supply zone 1897 - Mayens d'Arpette (ORS42) - Réservoir d'Arpettaz 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.