Drinking water in Grandson
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.
Fontaine Lassueur (29 avril )
Viteos / Commune de GrandsonAssigned 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 | 2.98 mg/L | 40 mg/l | 7 % | Single value · Fontaine Lassueur (29 avril 2025) |
| Sulphate | 38.2 mg/L | — | — | Single value · Fontaine Lassueur (29 avril 2025) |
| Sodium | 9.34 mg/L | 200 mg/l | 5 % | Single value · Fontaine Lassueur (29 avril 2025) |
Show all recorded parameters (11 — most recent value per parameter)
Chemical parameters (1)
| Parameter | Value | Parametric value | Share of the parametric value | Reference |
|---|---|---|---|---|
| Nitrate | 2.98 mg/L | 40 mg/l | 7 % | Single value · Fontaine Lassueur (29 avril 2025) |
Indicator parameters (5)
| Parameter | Value | Parametric value | Share of the parametric value | Reference |
|---|---|---|---|---|
| Chloride | 15.4 mg/L | — | — | Single value · Fontaine Lassueur (29 avril 2025) |
| Conductivity (25 °C) | 470 µS | — | — | Single value · Fontaine Lassueur (29 avril 2025) |
| pH | 7.6 | — | — | Single value · Fontaine Lassueur (29 avril 2025) |
| Sodium | 9.34 mg/L | 200 mg/l | 5 % | Single value · Fontaine Lassueur (29 avril 2025) |
| Sulphate | 38.2 mg/L | — | — | Single value · Fontaine Lassueur (29 avril 2025) |
Further parameters (5)
| Parameter | Value | Parametric value | Share of the parametric value | Reference |
|---|---|---|---|---|
| Calcium | 72.9 mg/L | — | — | Single value · Fontaine Lassueur (29 avril 2025) |
| Hydrogen carbonate | 230.7 °f | — | — | Single value · Fontaine Lassueur (29 avril 2025) |
| Magnesium | 11 mg/L | — | — | Single value · Fontaine Lassueur (29 avril 2025) |
| Potassium | 1.27 mg/L | — | — | Single value · Fontaine Lassueur (29 avril 2025) |
| Total hardness | 23.5 mg/L | — | — | Single value · Fontaine Lassueur (29 avril 2025) |
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: 1422
Show 2 more supply zones
Réseau basse-pression
Viteos / Commune de GrandsonAssigned 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 | 20.7 mg/L | 40 mg/l | 52 % | Single value · Réseau basse pression |
Show all recorded parameters (3 — most recent value per parameter)
Chemical parameters (1)
| Parameter | Value | Parametric value | Share of the parametric value | Reference |
|---|---|---|---|---|
| Nitrate | 20.7 mg/L | 40 mg/l | 52 % | Single value · Réseau basse pression |
Metabolites (1)
| Parameter | Value | Parametric value | Share of the parametric value | Reference |
|---|---|---|---|---|
| Chlorothalonil metabolite R471811 | <0.050 μg/l below limit of quantification | 0.1 µg/l | < 50 % * | Single value · Réseau basse pression |
* 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 (1)
| Parameter | Value | Parametric value | Share of the parametric value | Reference |
|---|---|---|---|---|
| Total hardness | 33.1 °f | — | — | Single value · Réseau basse pression |
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: 1422
Réseau haute pression
Viteos / Commune de GrandsonAssigned 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 | 2.98 mg/L | 40 mg/l | 7 % | Single value · Réseau haute pression |
Show all recorded parameters (3 — most recent value per parameter)
Chemical parameters (1)
| Parameter | Value | Parametric value | Share of the parametric value | Reference |
|---|---|---|---|---|
| Nitrate | 2.98 mg/L | 40 mg/l | 7 % | Single value · Réseau haute pression |
Metabolites (1)
| Parameter | Value | Parametric value | Share of the parametric value | Reference |
|---|---|---|---|---|
| Chlorothalonil metabolite R471811 | 0.170 μg/l | 0.1 µg/l | 170 % above the parametric value | Single value · Réseau haute pression |
| Note from the water supplier in the document: Comme pour tout le plateau suisse, la teneur en Chlorothalonil R471811 dépasse l'exigence de 0.100 μg/l uniquement sur le réseau haute pression. | ||||
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.
Further parameters (1)
| Parameter | Value | Parametric value | Share of the parametric value | Reference |
|---|---|---|---|---|
| Total hardness | 23.5 °f | — | — | Single value · Réseau haute pression |
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: 1422
Frequently asked questions about drinking water in Grandson
- How much nitrate is in the drinking water in Grandson?
- Viteos / Commune de Grandson publishes a nitrate value of 2.98 mg/L for the supply zone Fontaine Lassueur (29 avril ). The statutory parametric value is 40 mg/l; the measured value represents 7 % of the parametric value. Basis: 2025, retrieved on 12/08/2026.
- Who supplies the drinking water in Grandson?
- Viteos / Commune de Grandson. The values shown here come from the supply zone Fontaine Lassueur (29 avril ) 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.