How hard is the water in Biezwil?

Wasserversorgung Biezwil publishes a total hardness of 31.3 °fH for the supply zone BIEZWIL — that corresponds to 17.5 °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 Biezwil?

Wasserversorgung Biezwil publishes a nitrate value of 9.5 mg/l for the supply zone BIEZWIL. The statutory parametric value is 40 mg/l; the measured value represents 24 % of the parametric value. Basis: 2025, retrieved on 07/08/2026.

Who supplies the drinking water in Biezwil?

Wasserversorgung Biezwil. The values shown here come from the supply zone BIEZWIL 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 Biezwil

One supply zone, water supplier: Wasserversorgung Biezwil.

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.

BIEZWIL

Wasserversorgung Biezwil

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

Water hardness

17.5 °dH

Hardness range hard

Key values BIEZWIL
Parameter	Value	Parametric value	Share of the parametric value	Reference
Nitrate	9.5 mg/l	40 mg/l	24 %	Mean · BIEZWIL
Escherichia coli (E. coli)	nn not detectable Unit not stated in the document	0/100 ml	—	Maximum · Median nn · BIEZWIL
Sodium	3.8 mg/l	200 mg/l	2 %	Mean · BIEZWIL

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

Microbiology (3)

Microbiology – BIEZWIL
Parameter	Value	Parametric value	Share of the parametric value	Reference
Aerobic mesophilic bacteria	9 KBE/ml	300 1/ml	—	Mean · BIEZWIL
Escherichia coli (E. coli)	nn not detectable Unit not stated in the document	0/100 ml	—	Maximum · Median nn · BIEZWIL
Intestinal enterococci	nn not detectable Unit not stated in the document	0/100 ml	—	Maximum · Median nn · BIEZWIL

Chemical parameters (1)

Chemical parameters – BIEZWIL
Parameter	Value	Parametric value	Share of the parametric value	Reference
Nitrate	9.5 mg/l	40 mg/l	24 %	Mean · BIEZWIL

PFAS (3)

PFAS – BIEZWIL
Parameter	Value	Parametric value	Share of the parametric value	Reference
Perfluorohexane sulfonic acid (PFHxS)	< 0.001 µg/l below limit of quantification	0.3 µg/l	< 0.3 % *	Mean · BIEZWIL
Perfluorooctanesulfonic acid (PFOS)	< 0.001 µg/l below limit of quantification	0.3 µg/l	< 0.3 % *	Mean · BIEZWIL
Perfluorooctanoic acid (PFOA)	0.008 µg/l	0.5 µg/l	2 %	Mean · BIEZWIL

* 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.

Metabolites (2)

Metabolites – BIEZWIL
Parameter	Value	Parametric value	Share of the parametric value	Reference
Chlorothalonil metabolite R417888	< 0.02 µg/l below limit of quantification	0.1 µg/l	< 20 % *	Mean · BIEZWIL
Chlorothalonil metabolite R471811	0.04 µg/l	0.1 µg/l	40 %	Mean · BIEZWIL

Indicator parameters (2)

Indicator parameters – BIEZWIL
Parameter	Value	Parametric value	Share of the parametric value	Reference
Sodium	3.8 mg/l	200 mg/l	2 %	Mean · BIEZWIL
Temperature	10.5 °C	—	—	Mean · BIEZWIL

Further parameters (4)

Further parameters – BIEZWIL
Parameter	Value	Parametric value	Share of the parametric value	Reference
Calcium	85.4 mg/l	—	—	Mean · BIEZWIL
Magnesium	24.3 mg/l	—	—	Mean · BIEZWIL
Potassium	1 mg/l	—	—	Mean · BIEZWIL
Total hardness	31.3 °fH	—	—	Mean · BIEZWIL

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/1341/wasserversorgung-biezwil/2298/biezwil · 2025 · 2025 · retrieved on 07/08/2026

Postcodes in this zone: 4585

Frequently asked questions about drinking water in Biezwil

How hard is the water in Biezwil?: Wasserversorgung Biezwil publishes a total hardness of 31.3 °fH for the supply zone BIEZWIL — that corresponds to 17.5 °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 Biezwil?: Wasserversorgung Biezwil publishes a nitrate value of 9.5 mg/l for the supply zone BIEZWIL. The statutory parametric value is 40 mg/l; the measured value represents 24 % of the parametric value. Basis: 2025, retrieved on 07/08/2026.
Who supplies the drinking water in Biezwil?: Wasserversorgung Biezwil. The values shown here come from the supply zone BIEZWIL 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.