How hard is the water in Rüti ZH?

Gemeindewerke Rüti ZH publishes a total hardness of 28.1 °fH for the supply zone 8630 Rüti ZH — that corresponds to 15.7 °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: 2025, retrieved on 07/08/2026.

How much nitrate is in the drinking water in Rüti ZH?

Gemeindewerke Rüti ZH publishes a nitrate value of 10.7 mg/l for the supply zone 8630 Rüti ZH. The statutory parametric value is 40 mg/l; the measured value represents 27 % of the parametric value. Basis: 2025, retrieved on 07/08/2026.

Who supplies the drinking water in Rüti ZH?

Gemeindewerke Rüti ZH. The values shown here come from the supply zone 8630 Rüti 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.

Drinking water in Rüti ZH

One supply zone, water supplier: Gemeindewerke Rüti ZH.

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.

8630 Rüti ZH

Gemeindewerke Rüti ZH

Assigned via the water supplier — the exact supply zone boundary within the postcode is not yet linked.

Water hardness

15.7 °dH

Hardness range hard

Key values 8630 Rüti ZH
Parameter	Value	Parametric value	Share of the parametric value	Reference
Nitrate	10.7 mg/l	40 mg/l	27 %	Mean · 8630 Rüti ZH
Escherichia coli (E. coli)	0 KBE/100ml	0/100 ml	—	Maximum · Median 0 · 8630 Rüti ZH
Sulphate	8.8 mg/l	—	—	Mean · 8630 Rüti ZH
Sodium	6.9 mg/l	200 mg/l	3 %	Mean · 8630 Rüti ZH

Show all recorded parameters (15 — most recent value per parameter)

Microbiology (3)

Microbiology – 8630 Rüti ZH
Parameter	Value	Parametric value	Share of the parametric value	Reference
Aerobic mesophilic bacteria	44.3 KBE/ml	300 1/ml	—	Mean · 8630 Rüti ZH
Escherichia coli (E. coli)	0 KBE/100ml	0/100 ml	—	Maximum · Median 0 · 8630 Rüti ZH
Intestinal enterococci	0 KBE/100ml	0/100 ml	—	Maximum · Median 0 · 8630 Rüti ZH

Chemical parameters (2)

Chemical parameters – 8630 Rüti ZH
Parameter	Value	Parametric value	Share of the parametric value	Reference
Fluoride	0.1 mg/l	1.5 mg/l	7 %	Mean · 8630 Rüti ZH
Nitrate	10.7 mg/l	40 mg/l	27 %	Mean · 8630 Rüti ZH

Indicator parameters (6)

Indicator parameters – 8630 Rüti ZH
Parameter	Value	Parametric value	Share of the parametric value	Reference
Chloride	9.7 mg/l	—	—	Mean · 8630 Rüti ZH
Conductivity (25 °C)	487.7 µS/cm	—	—	Mean · 8630 Rüti ZH
pH	7.4	—	—	Mean · 8630 Rüti ZH
Sodium	6.9 mg/l	200 mg/l	3 %	Mean · 8630 Rüti ZH
Sulphate	8.8 mg/l	—	—	Mean · 8630 Rüti ZH
Temperature	12.9 °C	—	—	Mean · 8630 Rüti ZH

Further parameters (4)

Further parameters – 8630 Rüti ZH
Parameter	Value	Parametric value	Share of the parametric value	Reference
Calcium	86.8 mg/l	—	—	Mean · 8630 Rüti ZH
Magnesium	15.5 mg/l	—	—	Mean · 8630 Rüti ZH
Potassium	1.4 mg/l	—	—	Mean · 8630 Rüti ZH
Total hardness	28.1 °fH	—	—	Mean · 8630 Rüti 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.

Source: https://trinkwasser.ch/de/versorger/627/gemeindewerke-ruti-zh/3107/8630-ruti-zh · 2025 · 2025 · retrieved on 07/08/2026

Postcodes in this zone: 8630

Frequently asked questions about drinking water in Rüti ZH

How hard is the water in Rüti ZH?: Gemeindewerke Rüti ZH publishes a total hardness of 28.1 °fH for the supply zone 8630 Rüti ZH — that corresponds to 15.7 °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: 2025, retrieved on 07/08/2026.
How much nitrate is in the drinking water in Rüti ZH?: Gemeindewerke Rüti ZH publishes a nitrate value of 10.7 mg/l for the supply zone 8630 Rüti ZH. The statutory parametric value is 40 mg/l; the measured value represents 27 % of the parametric value. Basis: 2025, retrieved on 07/08/2026.
Who supplies the drinking water in Rüti ZH?: Gemeindewerke Rüti ZH. The values shown here come from the supply zone 8630 Rüti 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.