Drinking water in St. Gallen
One supply zone, water supplier: St.Galler Stadtwerke.
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.
Stadt St.Gallen
St.Galler StadtwerkeAssigned 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 | 4 mg/l | 40 mg/l | 10 % | Mean · Stadt St.Gallen |
| Escherichia coli (E. coli) | 1 KBE/100ml | 0/100 ml | above the parametric value — this parameter must not be detectable | Maximum · Median 0 · Stadt St.Gallen |
| Sulphate | 33 mg/l | — | — | Mean · Stadt St.Gallen |
| Sodium | 6 mg/l | 200 mg/l | 3 % | Mean · Stadt St.Gallen |
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 (24 — most recent value per parameter)
Microbiology (3)
| Parameter | Value | Parametric value | Share of the parametric value | Reference |
|---|---|---|---|---|
| Aerobic mesophilic bacteria | 3 KBE/ml | 300 1/ml | — | Mean · Stadt St.Gallen |
| Escherichia coli (E. coli) | 1 KBE/100ml | 0/100 ml | above the parametric value — this parameter must not be detectable | Maximum · Median 0 · Stadt St.Gallen |
| Intestinal enterococci | 1 KBE/100ml | 0/100 ml | above the parametric value — this parameter must not be detectable | Maximum · Median 0 · Stadt St.Gallen |
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 (1)
| Parameter | Value | Parametric value | Share of the parametric value | Reference |
|---|---|---|---|---|
| Nitrate | 4 mg/l | 40 mg/l | 10 % | Mean · Stadt St.Gallen |
PFAS (4)
| Parameter | Value | Parametric value | Share of the parametric value | Reference |
|---|---|---|---|---|
| Perfluorohexane sulfonic acid (PFHxS) | < 0.001 µg/l below limit of quantification | 0.3 µg/l | < 0.3 % * | Mean · Stadt St.Gallen |
| Perfluorohexanoic acid (PFHxA) | 0.001 µg/l | — | — | Mean · Stadt St.Gallen |
| Perfluorooctanesulfonic acid (PFOS) | 0.003 µg/l | 0.3 µg/l | 1 % | Mean · Stadt St.Gallen |
| Perfluorooctanoic acid (PFOA) | < 0.001 µg/l below limit of quantification | 0.5 µg/l | < 0.2 % * | Mean · Stadt St.Gallen |
* 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.
Metabolites (2)
| Parameter | Value | Parametric value | Share of the parametric value | Reference |
|---|---|---|---|---|
| Chlorothalonil metabolite R417888 | < 0.001 µg/l below limit of quantification | 0.1 µg/l | < 1 % * | Mean · Stadt St.Gallen |
| Chlorothalonil metabolite R471811 | 0.029 µg/l | 0.1 µg/l | 29 % | Mean · Stadt St.Gallen |
* 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 (9)
| Parameter | Value | Parametric value | Share of the parametric value | Reference |
|---|---|---|---|---|
| Chloride | 7 mg/l | — | — | Mean · Stadt St.Gallen |
| Conductivity (25 °C) | 305 µS/cm | — | — | Mean · Stadt St.Gallen |
| Iron | < 0.005 mg/l below limit of quantification | 0.2 mg/l | < 3 % * | Mean · Stadt St.Gallen |
| Manganese | < 0.0001 mg/l below limit of quantification | 50 µg/l | < 0.2 % * | Mean · Stadt St.Gallen |
| pH | 8.02 | — | — | Mean · Stadt St.Gallen |
| Sodium | 6 mg/l | 200 mg/l | 3 % | Mean · Stadt St.Gallen |
| Sulphate | 33 mg/l | — | — | Mean · Stadt St.Gallen |
| Temperature | 9.9 °C | — | — | Mean · Stadt St.Gallen |
| Turbidity | < 0.1 TE/F below limit of quantification | — | — | Mean · Stadt St.Gallen |
* 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 | 51 mg/l | — | — | Mean · Stadt St.Gallen |
| Dissolved organic carbon (DOC) | 0.88 mg/l | — | — | Mean · Stadt St.Gallen |
| Magnesium | 8 mg/l | — | — | Mean · Stadt St.Gallen |
| Potassium | 1.5 mg/l | — | — | Mean · Stadt St.Gallen |
| Total hardness | 16.2 °fH | — | — | Mean · Stadt St.Gallen |
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: 9000
Frequently asked questions about drinking water in St. Gallen
- How hard is the water in St. Gallen?
- St.Galler Stadtwerke publishes a total hardness of 16.2 °fH for the supply zone Stadt St.Gallen — that corresponds to 9.1 °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 St. Gallen?
- St.Galler Stadtwerke publishes a nitrate value of 4 mg/l for the supply zone Stadt St.Gallen. The statutory parametric value is 40 mg/l; the measured value represents 10 % of the parametric value. Basis: 2025, retrieved on 07/08/2026.
- Who supplies the drinking water in St. Gallen?
- St.Galler Stadtwerke. The values shown here come from the supply zone Stadt St.Gallen 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.
No data yet
For 7 postcodes 9008, 9010, 9011, 9012, 9014, 9015, 9016 there is no verified assignment yet.