How hard is the water in Frenkendorf?

Wasserversorgung Frenkendorf publishes a total hardness of 26.7 °fH for the supply zone Frenkendorf — that corresponds to 15 °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 Frenkendorf?

Wasserversorgung Frenkendorf publishes a nitrate value of 8.39 mg/l for the supply zone Frenkendorf. The statutory parametric value is 40 mg/l; the measured value represents 21 % of the parametric value. Basis: 2025, retrieved on 07/08/2026.

Who supplies the drinking water in Frenkendorf?

Wasserversorgung Frenkendorf. The values shown here come from the supply zone Frenkendorf 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 Frenkendorf

One supply zone, water supplier: Wasserversorgung Frenkendorf.

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.

Frenkendorf

Wasserversorgung Frenkendorf

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

Water hardness

15 °dH

Hardness range hard

Key values Frenkendorf
Parameter	Value	Parametric value	Share of the parametric value	Reference
Sum of PFAS	0.057 µg/l	—	—	Mean · Frenkendorf
Nitrate	8.39 mg/l	40 mg/l	21 %	Mean · Frenkendorf
Escherichia coli (E. coli)	nn not detectable Unit not stated in the document	0/100 ml	—	Maximum · Median nn · Frenkendorf
Sulphate	10 mg/l	—	—	Mean · Frenkendorf
Sodium	2.58 mg/l	200 mg/l	1 %	Mean · Frenkendorf

Show all recorded parameters (17 — most recent value per parameter)

Microbiology (3)

Microbiology – Frenkendorf
Parameter	Value	Parametric value	Share of the parametric value	Reference
Aerobic mesophilic bacteria	39.64 KBE/ml	300 1/ml	—	Mean · Frenkendorf
Escherichia coli (E. coli)	nn not detectable Unit not stated in the document	0/100 ml	—	Maximum · Median nn · Frenkendorf
Intestinal enterococci	nn not detectable Unit not stated in the document	0/100 ml	—	Maximum · Median nn · Frenkendorf

Chemical parameters (2)

Chemical parameters – Frenkendorf
Parameter	Value	Parametric value	Share of the parametric value	Reference
Fluoride	0.05 mg/l	1.5 mg/l	3 %	Mean · Frenkendorf
Nitrate	8.39 mg/l	40 mg/l	21 %	Mean · Frenkendorf

PFAS (1)

PFAS – Frenkendorf
Parameter	Value	Parametric value	Share of the parametric value	Reference
Sum of PFAS	0.057 µg/l	—	—	Mean · Frenkendorf

Indicator parameters (7)

Indicator parameters – Frenkendorf
Parameter	Value	Parametric value	Share of the parametric value	Reference
Chloride	3.96 mg/l	—	—	Mean · Frenkendorf
Conductivity (25 °C)	502 µS/cm	—	—	Mean · Frenkendorf
pH	7.72	—	—	Mean · Frenkendorf
Sodium	2.58 mg/l	200 mg/l	1 %	Mean · Frenkendorf
Sulphate	10 mg/l	—	—	Mean · Frenkendorf
Temperature	12.8 °C	—	—	Mean · Frenkendorf
Turbidity	0.68 TE/F	—	—	Mean · Frenkendorf

Further parameters (4)

Further parameters – Frenkendorf
Parameter	Value	Parametric value	Share of the parametric value	Reference
Calcium	107 mg/l	—	—	Mean · Frenkendorf
Magnesium	2.5 mg/l	—	—	Mean · Frenkendorf
Potassium	1.25 mg/l	—	—	Mean · Frenkendorf
Total hardness	26.7 °fH	—	—	Mean · Frenkendorf

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/1545/wasserversorgung-frenkendorf/2951/frenkendorf · 2025 · 2025 · retrieved on 07/08/2026

Postcodes in this zone: 4402

Frequently asked questions about drinking water in Frenkendorf

How hard is the water in Frenkendorf?: Wasserversorgung Frenkendorf publishes a total hardness of 26.7 °fH for the supply zone Frenkendorf — that corresponds to 15 °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 Frenkendorf?: Wasserversorgung Frenkendorf publishes a nitrate value of 8.39 mg/l for the supply zone Frenkendorf. The statutory parametric value is 40 mg/l; the measured value represents 21 % of the parametric value. Basis: 2025, retrieved on 07/08/2026.
Who supplies the drinking water in Frenkendorf?: Wasserversorgung Frenkendorf. The values shown here come from the supply zone Frenkendorf 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.