Drinking water in Riedikon
One supply zone, water supplier: Energie Uster AG.
How to read the share of the parametric value
12 % Share of the parametric value. The proportion of the permitted maximum that the measured value uses — here 12 %, so just over an eighth.
< 10 % * Below the limit of quantification. The substance was not detectable. The mark shows where the detection limit lies relative to the parametric value — the actual share of the parametric value is below that.
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 und Region Uster
Energie Uster AGAssigned via the water supplier — the exact supply zone boundary within the postcode is not yet linked.
Water hardness
20.2 °dH
Hardness range hard
| Parameter | Value | Parametric value | Share of the parametric value | Reference |
|---|---|---|---|---|
| Nitrate | 20.9 mg/l | 40 mg/l | 52 % | Mean · Stadt und Region Uster |
| Escherichia coli (E. coli) | 0 KBE/100ml | 0/100 ml | — | Maximum · Median 0 · Stadt und Region Uster |
| Sulphate | 15.1 mg/l | — | — | Mean · Stadt und Region Uster |
| Sodium | 12.5 mg/l | 200 mg/l | 6 % | Mean · Stadt und Region Uster |
Show all recorded parameters (19 — most recent value per parameter)
Microbiology (3)
| Parameter | Value | Parametric value | Share of the parametric value | Reference |
|---|---|---|---|---|
| Aerobic mesophilic bacteria | 13.6 KBE/ml | 300 1/ml | — | Mean · Stadt und Region Uster |
| Escherichia coli (E. coli) | 0 KBE/100ml | 0/100 ml | — | Maximum · Median 0 · Stadt und Region Uster |
| Intestinal enterococci | 0 KBE/100ml | 0/100 ml | — | Maximum · Median 0 · Stadt und Region Uster |
Chemical parameters (2)
| Parameter | Value | Parametric value | Share of the parametric value | Reference |
|---|---|---|---|---|
| Fluoride | 0.05 mg/l | 1.5 mg/l | 3 % | Mean · Stadt und Region Uster |
| Nitrate | 20.9 mg/l | 40 mg/l | 52 % | Mean · Stadt und Region Uster |
Metabolites (2)
| Parameter | Value | Parametric value | Share of the parametric value | Reference |
|---|---|---|---|---|
| Chlorothalonil metabolite R417888 | 0.01 µg/l | 0.1 µg/l | 10 % | Mean · Stadt und Region Uster |
| Chlorothalonil metabolite R471811 | 0.085 µg/l | 0.1 µg/l | 85 % | Mean · Stadt und Region Uster |
Indicator parameters (6)
| Parameter | Value | Parametric value | Share of the parametric value | Reference |
|---|---|---|---|---|
| Chloride | 17.8 mg/l | — | — | Mean · Stadt und Region Uster |
| Conductivity (25 °C) | 638 µS/cm | — | — | Mean · Stadt und Region Uster |
| pH | 7.2 | — | — | Mean · Stadt und Region Uster |
| Sodium | 12.5 mg/l | 200 mg/l | 6 % | Mean · Stadt und Region Uster |
| Sulphate | 15.1 mg/l | — | — | Mean · Stadt und Region Uster |
| Temperature | 13.1 °C | — | — | Mean · Stadt und Region Uster |
Further parameters (6)
| Parameter | Value | Parametric value | Share of the parametric value | Reference |
|---|---|---|---|---|
| Calcium | 113.8 mg/l | — | — | Mean · Stadt und Region Uster |
| Dissolved organic carbon (DOC) | 0.4 mg/l | — | — | Mean · Stadt und Region Uster |
| Magnesium | 18.7 mg/l | — | — | Mean · Stadt und Region Uster |
| Potassium | 2.5 mg/l | — | — | Mean · Stadt und Region Uster |
| Spectral absorption coefficient 254 nm (SAC 254) | 0.96 1/m | — | — | Mean · Stadt und Region Uster |
| Total hardness | 36.1 °fH | — | — | Mean · Stadt und Region Uster |
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.
Source: https://trinkwasser.ch/de/versorger/756/energie-uster-ag/3358/stadt-und-region-uster · 2025 · 2025 · retrieved on 07/08/2026
Postcodes in this zone: 8616
Frequently asked questions about drinking water in Riedikon
- How hard is the water in Riedikon?
- Energie Uster AG publishes a total hardness of 36.1 °fH for the supply zone Stadt und Region Uster — that corresponds to 20.2 °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 Riedikon?
- Energie Uster AG publishes a nitrate value of 20.9 mg/l for the supply zone Stadt und Region Uster. The statutory parametric value is 40 mg/l; the measured value represents 52 % of the parametric value. Basis: 2025, retrieved on 07/08/2026.
- Who supplies the drinking water in Riedikon?
- Energie Uster AG. The values shown here come from the supply zone Stadt und Region Uster 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.