How hard is the water in Bennwil?

Wasserversorgung Bennwil publishes a total hardness of 29.4 °fH for the supply zone Bennwil — that corresponds to 16.5 °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 Bennwil?

Wasserversorgung Bennwil publishes a nitrate value of 9.52 mg/l for the supply zone Bennwil. 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 Bennwil?

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

2 supply zones — values can differ depending on the district. Below is the zone with the most documented parameters, the others collapsed underneath. To determine the exact match, look up the postcode.

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.

Bennwil

Wasserversorgung Bennwil

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

Water hardness

16.5 °dH

Hardness range hard

Key values Bennwil
Parameter	Value	Parametric value	Share of the parametric value	Reference
Nitrate	9.52 mg/l	40 mg/l	24 %	Mean · Bennwil
Escherichia coli (E. coli)	nn not detectable Unit not stated in the document	0/100 ml	—	Maximum · Median 0 · Bennwil
Sulphate	45.7 mg/l	—	—	Mean · Bennwil
Sodium	3.39 mg/l	200 mg/l	2 %	Mean · Bennwil

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

Microbiology (3)

Microbiology – Bennwil
Parameter	Value	Parametric value	Share of the parametric value	Reference
Aerobic mesophilic bacteria	3 KBE/ml	300 1/ml	—	Mean · Bennwil
Escherichia coli (E. coli)	nn not detectable Unit not stated in the document	0/100 ml	—	Maximum · Median 0 · Bennwil
Intestinal enterococci	nn not detectable Unit not stated in the document	0/100 ml	—	Maximum · Median 0 · Bennwil

Chemical parameters (2)

Chemical parameters – Bennwil
Parameter	Value	Parametric value	Share of the parametric value	Reference
Fluoride	0.09 mg/l	1.5 mg/l	6 %	Mean · Bennwil
Nitrate	9.52 mg/l	40 mg/l	24 %	Mean · Bennwil

Indicator parameters (7)

Indicator parameters – Bennwil
Parameter	Value	Parametric value	Share of the parametric value	Reference
Chloride	2.66 mg/l	—	—	Mean · Bennwil
Conductivity (25 °C)	533 µS/cm	—	—	Mean · Bennwil
pH	7.78	—	—	Mean · Bennwil
Sodium	3.39 mg/l	200 mg/l	2 %	Mean · Bennwil
Sulphate	45.7 mg/l	—	—	Mean · Bennwil
Temperature	17.5 °C	—	—	Mean · Bennwil
Turbidity	0.42 TE/F	—	—	Mean · Bennwil

Further parameters (3)

Further parameters – Bennwil
Parameter	Value	Parametric value	Share of the parametric value	Reference
Calcium	94.4 mg/l	—	—	Mean · Bennwil
Magnesium	14.1 mg/l	—	—	Mean · Bennwil
Total hardness	29.4 °fH	—	—	Mean · Bennwil

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/1584/wasserversorgung-bennwil/3326/bennwil · 2025 · 2025 · retrieved on 07/08/2026

Postcodes in this zone: 4431

Show 1 more supply zone

Haidershofen

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 30/11/2023. 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

19 °dH

Hardness range hard

Key values Haidershofen
Parameter	Value	Parametric value	Share of the parametric value	Reference
Nitrate	17 mg/l	50 mg/l	34 %	Single value
Sulphate	15,3 mg/l	250 mg/l	6 %	Single value
Sodium	5,9 mg/l	200 mg/l	3 %	Single value

Show all recorded parameters (8 — most recent value per parameter)

Chemical parameters (1)

Chemical parameters – Haidershofen
Parameter	Value	Parametric value	Share of the parametric value	Reference
Nitrate	17 mg/l	50 mg/l	34 %	Single value

Indicator parameters (4)

Indicator parameters – Haidershofen
Parameter	Value	Parametric value	Share of the parametric value	Reference
Chloride	10,7 mg/l	200 mg/l	5 %	Single value
pH	7,51	6,5–9,5	—	Single value
Sodium	5,9 mg/l	200 mg/l	3 %	Single value
Sulphate	15,3 mg/l	250 mg/l	6 %	Single value

Further parameters (3)

Further parameters – Haidershofen
Parameter	Value	Parametric value	Share of the parametric value	Reference
Magnesium	27,5 mg/l	150 mg/l	18 %	Single value
Potassium	2,1 mg/l	50 mg/l	4 %	Single value
Total hardness	19 °dH	—	—	Single value

Source: https://login.gemeindeserver.net/getfile/393512/10/Trinkwasserwerte_Hp_30.11.2022.pdf · 30.11.2023 · retrieved on 11/08/2026

Postcodes in this zone: 4431

Frequently asked questions about drinking water in Bennwil

How hard is the water in Bennwil?: Wasserversorgung Bennwil publishes a total hardness of 29.4 °fH for the supply zone Bennwil — that corresponds to 16.5 °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 Bennwil?: Wasserversorgung Bennwil publishes a nitrate value of 9.52 mg/l for the supply zone Bennwil. 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 Bennwil?: Wasserversorgung Bennwil. The values shown here come from the supply zone Bennwil 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.