Drinking water in Irdning-Donnersbachtal
2 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.
Stadt Dietikon
DietikonAssigned 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 31/12/2023. 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 | 9.7 mg/l | 40 mg/l | 24 % | Mean · Stadt Dietikon |
| Escherichia coli (E. coli) | nn not detectable Unit not stated in the document | 0/100 ml | — | Maximum · Median nn · Stadt Dietikon |
| Sulphate | 23.6 mg/l | — | — | Mean · Stadt Dietikon |
| Sodium | 18.3 mg/l | 200 mg/l | 9 % | Mean · Stadt Dietikon |
Show all recorded parameters (16 — most recent value per parameter)
Microbiology (3)
| Parameter | Value | Parametric value | Share of the parametric value | Reference |
|---|---|---|---|---|
| Aerobic mesophilic bacteria | 2.7 KBE/ml | 300 1/ml | — | Mean · Stadt Dietikon |
| Escherichia coli (E. coli) | nn not detectable Unit not stated in the document | 0/100 ml | — | Maximum · Median nn · Stadt Dietikon |
| Intestinal enterococci | nn not detectable Unit not stated in the document | 0/100 ml | — | Maximum · Median nn · Stadt Dietikon |
Chemical parameters (2)
| Parameter | Value | Parametric value | Share of the parametric value | Reference |
|---|---|---|---|---|
| Fluoride | 0.1 mg/l | 1.5 mg/l | 7 % | Mean · Stadt Dietikon |
| Nitrate | 9.7 mg/l | 40 mg/l | 24 % | Mean · Stadt Dietikon |
Metabolites (1)
| Parameter | Value | Parametric value | Share of the parametric value | Reference |
|---|---|---|---|---|
| Chlorothalonil metabolite R471811 | 0.053 µg/l | 0.1 µg/l | 53 % | Mean · Stadt Dietikon |
Indicator parameters (6)
| Parameter | Value | Parametric value | Share of the parametric value | Reference |
|---|---|---|---|---|
| Chloride | 27.5 mg/l | — | — | Mean · Stadt Dietikon |
| Conductivity (25 °C) | 526 µS/cm | — | — | Mean · Stadt Dietikon |
| pH | 7.4 | — | — | Mean · Stadt Dietikon |
| Sodium | 18.3 mg/l | 200 mg/l | 9 % | Mean · Stadt Dietikon |
| Sulphate | 23.6 mg/l | — | — | Mean · Stadt Dietikon |
| Temperature | 13.4 °C | — | — | Mean · Stadt Dietikon |
Further parameters (4)
| Parameter | Value | Parametric value | Share of the parametric value | Reference |
|---|---|---|---|---|
| Calcium | 79 mg/l | — | — | Mean · Stadt Dietikon |
| Magnesium | 17.1 mg/l | — | — | Mean · Stadt Dietikon |
| Potassium | 3.3 mg/l | — | — | Mean · Stadt Dietikon |
| Total hardness | 26.3 °fH | — | — | Mean · Stadt Dietikon |
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: 8953
Show 1 more supply zone
Wasserversorgung Schlieren
Stadt SchlierenAssigned 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 | 8.5 mg/l | 40 mg/l | 21 % | Mean · Wasserversorgung Schlieren |
| Escherichia coli (E. coli) | 0 KBE/100ml | 0/100 ml | — | Maximum · Median 0 · Wasserversorgung Schlieren |
| Sulphate | 17.8 mg/l | — | — | Mean · Wasserversorgung Schlieren |
| Sodium | 10.2 mg/l | 200 mg/l | 5 % | Mean · Wasserversorgung Schlieren |
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 | 16 KBE/ml | 300 1/ml | — | Mean · Wasserversorgung Schlieren |
| Escherichia coli (E. coli) | 0 KBE/100ml | 0/100 ml | — | Maximum · Median 0 · Wasserversorgung Schlieren |
| Intestinal enterococci | 0 KBE/100ml | 0/100 ml | — | Maximum · Median 0 · Wasserversorgung Schlieren |
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 · Wasserversorgung Schlieren |
| Nitrate | 8.5 mg/l | 40 mg/l | 21 % | Mean · Wasserversorgung Schlieren |
* 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 | 14.7 mg/l | — | — | Mean · Wasserversorgung Schlieren |
| Conductivity (25 °C) | 475.7 µS/cm | — | — | Mean · Wasserversorgung Schlieren |
| pH | 7.4 | — | — | Mean · Wasserversorgung Schlieren |
| Sodium | 10.2 mg/l | 200 mg/l | 5 % | Mean · Wasserversorgung Schlieren |
| Sulphate | 17.8 mg/l | — | — | Mean · Wasserversorgung Schlieren |
| Temperature | 13.2 °C | — | — | Mean · Wasserversorgung Schlieren |
Further parameters (4)
| Parameter | Value | Parametric value | Share of the parametric value | Reference |
|---|---|---|---|---|
| Calcium | 78.7 mg/l | — | — | Mean · Wasserversorgung Schlieren |
| Magnesium | 16.9 mg/l | — | — | Mean · Wasserversorgung Schlieren |
| Potassium | 1.6 mg/l | — | — | Mean · Wasserversorgung Schlieren |
| Total hardness | 26.6 °fH | — | — | Mean · Wasserversorgung Schlieren |
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: 8952
Frequently asked questions about drinking water in Irdning-Donnersbachtal
- How hard is the water in Irdning-Donnersbachtal?
- Dietikon publishes a total hardness of 26.3 °fH for the supply zone Stadt Dietikon — that corresponds to 14.7 °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: 2023, retrieved on 07/08/2026.
- How much nitrate is in the drinking water in Irdning-Donnersbachtal?
- Dietikon publishes a nitrate value of 9.7 mg/l for the supply zone Stadt Dietikon. The statutory parametric value is 40 mg/l; the measured value represents 24 % of the parametric value. Basis: 2023, retrieved on 07/08/2026.
- Who supplies the drinking water in Irdning-Donnersbachtal?
- Dietikon. The values shown here come from the supply zone Stadt Dietikon 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.