How hard is the water in Bäriswil BE?

Wasserverbund Grauholz AG publishes a total hardness of 21.4 °fH for the supply zone Gemeinde Bäriswil — that corresponds to 12 °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 Bäriswil BE?

Wasserverbund Grauholz AG publishes a nitrate value of 5.2 mg/l for the supply zone Gemeinde Bäriswil. The statutory parametric value is 40 mg/l; the measured value represents 13 % of the parametric value. Basis: 2025, retrieved on 07/08/2026.

Who supplies the drinking water in Bäriswil BE?

Wasserverbund Grauholz AG. The values shown here come from the supply zone Gemeinde Bäriswil 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 Bäriswil BE

One supply zone, water supplier: Wasserverbund Grauholz 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.

Gemeinde Bäriswil

Wasserverbund Grauholz AG

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

Water hardness

12 °dH

Hardness range medium

Key values Gemeinde Bäriswil
Parameter	Value	Parametric value	Share of the parametric value	Reference
Nitrate	5.2 mg/l	40 mg/l	13 %	Mean · Gemeinde Bäriswil
Escherichia coli (E. coli)	nn not detectable Unit not stated in the document	0/100 ml	—	Maximum · Median nn · Gemeinde Bäriswil
Sulphate	5.2 mg/l	—	—	Mean · Gemeinde Bäriswil
Sodium	3.7 mg/l	200 mg/l	2 %	Mean · Gemeinde Bäriswil

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

Microbiology (3)

Microbiology – Gemeinde Bäriswil
Parameter	Value	Parametric value	Share of the parametric value	Reference
Aerobic mesophilic bacteria	6 KBE/ml	300 1/ml	—	Mean · Gemeinde Bäriswil
Escherichia coli (E. coli)	nn not detectable Unit not stated in the document	0/100 ml	—	Maximum · Median nn · Gemeinde Bäriswil
Intestinal enterococci	nn not detectable Unit not stated in the document	0/100 ml	—	Maximum · Median nn · Gemeinde Bäriswil

Chemical parameters (2)

Chemical parameters – Gemeinde Bäriswil
Parameter	Value	Parametric value	Share of the parametric value	Reference
Fluoride	0.1 mg/l	1.5 mg/l	7 %	Mean · Gemeinde Bäriswil
Nitrate	5.2 mg/l	40 mg/l	13 %	Mean · Gemeinde Bäriswil

Indicator parameters (7)

Indicator parameters – Gemeinde Bäriswil
Parameter	Value	Parametric value	Share of the parametric value	Reference
Chloride	3.3 mg/l	—	—	Mean · Gemeinde Bäriswil
Conductivity (25 °C)	396 µS/cm	—	—	Mean · Gemeinde Bäriswil
pH	7.6	—	—	Mean · Gemeinde Bäriswil
Sodium	3.7 mg/l	200 mg/l	2 %	Mean · Gemeinde Bäriswil
Sulphate	5.2 mg/l	—	—	Mean · Gemeinde Bäriswil
Temperature	19.2 °C	—	—	Mean · Gemeinde Bäriswil
Turbidity	0.21 TE/F	—	—	Mean · Gemeinde Bäriswil

Further parameters (5)

Further parameters – Gemeinde Bäriswil
Parameter	Value	Parametric value	Share of the parametric value	Reference
Calcium	75 mg/l	—	—	Mean · Gemeinde Bäriswil
Hydrogen carbonate	20.1 mg/l	—	—	Mean · Gemeinde Bäriswil
Magnesium	6.5 mg/l	—	—	Mean · Gemeinde Bäriswil
Potassium	1.5 mg/l	—	—	Mean · Gemeinde Bäriswil
Total hardness	21.4 °fH	—	—	Mean · Gemeinde Bäriswil

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/1429/wasserverbund-grauholz-ag/3368/gemeinde-bariswil · 2025 · 2025 · retrieved on 07/08/2026

Postcodes in this zone: 3323

Frequently asked questions about drinking water in Bäriswil BE

How hard is the water in Bäriswil BE?: Wasserverbund Grauholz AG publishes a total hardness of 21.4 °fH for the supply zone Gemeinde Bäriswil — that corresponds to 12 °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 Bäriswil BE?: Wasserverbund Grauholz AG publishes a nitrate value of 5.2 mg/l for the supply zone Gemeinde Bäriswil. The statutory parametric value is 40 mg/l; the measured value represents 13 % of the parametric value. Basis: 2025, retrieved on 07/08/2026.
Who supplies the drinking water in Bäriswil BE?: Wasserverbund Grauholz AG. The values shown here come from the supply zone Gemeinde Bäriswil 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.