How hard is the water in Dietikon?

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 Dietikon?

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 Dietikon?

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.

Drinking water in Dietikon

One supply zone, water supplier: Dietikon.

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 Dietikon

Dietikon

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 31/12/2023. 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.

Water hardness

14.7 °dH

Hardness range hard

Key values Stadt Dietikon
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)

Microbiology – Stadt Dietikon
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)

Chemical parameters – Stadt Dietikon
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)

Metabolites – Stadt Dietikon
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)

Indicator parameters – Stadt Dietikon
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)

Further parameters – Stadt Dietikon
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.

Source: https://trinkwasser.ch/de/versorger/1062/dietikon/1836/stadt-dietikon · 2023 · 2023 · retrieved on 07/08/2026

Postcodes in this zone: 8953

Frequently asked questions about drinking water in Dietikon

How hard is the water in Dietikon?: 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 Dietikon?: 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 Dietikon?: 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.