Drinking water in Grüt (Gossau ZH)
One supply zone, water supplier: Wasserversorgungs-Genossenschaft Grüt und Gossau.
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.
Assigned via the water supplier — the exact supply zone boundary within the postcode is not yet linked.
These values are more than a year old. The most recent analysis the water supplier has published for this zone dates from 31/12/2024. We have no newer values — which is why we show the latest available ones rather than none at all. They say nothing about how the water has changed since then.
| Parameter | Value | Parametric value | Share of the parametric value | Reference |
|---|---|---|---|---|
| Nitrate | 15.3 mg/l | 40 mg/l | 38 % | Mean · Gossau ZH |
| Escherichia coli (E. coli) | 1 KBE/100ml | 0/100 ml | above the parametric value — this parameter must not be detectable | Maximum · Median 0 · Gossau ZH |
| Sulphate | 13.7 mg/l | — | — | Mean · Gossau ZH |
| Sodium | 7.8 mg/l | 200 mg/l | 4 % | Mean · Gossau ZH |
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 (15 — most recent value per parameter)
Microbiology (3)
| Parameter | Value | Parametric value | Share of the parametric value | Reference |
|---|---|---|---|---|
| Aerobic mesophilic bacteria | 29.4 KBE/ml | 300 1/ml | — | Mean · Gossau ZH |
| Escherichia coli (E. coli) | 1 KBE/100ml | 0/100 ml | above the parametric value — this parameter must not be detectable | Maximum · Median 0 · Gossau ZH |
| Intestinal enterococci | 0 KBE/100ml | 0/100 ml | — | Maximum · Median 0 · Gossau ZH |
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 · Gossau ZH |
| Nitrate | 15.3 mg/l | 40 mg/l | 38 % | Mean · Gossau ZH |
* 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 (6)
| Parameter | Value | Parametric value | Share of the parametric value | Reference |
|---|---|---|---|---|
| Chloride | 13.3 mg/l | — | — | Mean · Gossau ZH |
| Conductivity (25 °C) | 545 µS/cm | — | — | Mean · Gossau ZH |
| pH | 7.4 | — | — | Mean · Gossau ZH |
| Sodium | 7.8 mg/l | 200 mg/l | 4 % | Mean · Gossau ZH |
| Sulphate | 13.7 mg/l | — | — | Mean · Gossau ZH |
| Temperature | 13.7 °C | — | — | Mean · Gossau ZH |
Further parameters (4)
| Parameter | Value | Parametric value | Share of the parametric value | Reference |
|---|---|---|---|---|
| Calcium | 96.8 mg/l | — | — | Mean · Gossau ZH |
| Magnesium | 17.2 mg/l | — | — | Mean · Gossau ZH |
| Potassium | 1.5 mg/l | — | — | Mean · Gossau ZH |
| Total hardness | 31.2 °fH | — | — | Mean · Gossau ZH |
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: 8624
Frequently asked questions about drinking water in Grüt (Gossau ZH)
- How hard is the water in Grüt (Gossau ZH)?
- Wasserversorgungs-Genossenschaft Grüt und Gossau publishes a total hardness of 31.2 °fH for the supply zone Gossau ZH — that corresponds to 17.5 °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: 2024, retrieved on 07/08/2026.
- How much nitrate is in the drinking water in Grüt (Gossau ZH)?
- Wasserversorgungs-Genossenschaft Grüt und Gossau publishes a nitrate value of 15.3 mg/l for the supply zone Gossau ZH. The statutory parametric value is 40 mg/l; the measured value represents 38 % of the parametric value. Basis: 2024, retrieved on 07/08/2026.
- Who supplies the drinking water in Grüt (Gossau ZH)?
- Wasserversorgungs-Genossenschaft Grüt und Gossau. The values shown here come from the supply zone Gossau ZH 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.