How hard is the water in Lengnau AG?

Wasserversorgungsgenossenschaft Lengnau AG publishes a total hardness of 23.47 °fH for the supply zone 5426 Lengnau Dorf mit den Weilern Himmelrich und Vogelsang — that corresponds to 13.1 °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: 2026, retrieved on 07/08/2026.

How much nitrate is in the drinking water in Lengnau AG?

Wasserversorgungsgenossenschaft Lengnau AG publishes a nitrate value of 10.77 mg/l for the supply zone 5426 Lengnau Dorf mit den Weilern Himmelrich und Vogelsang. The statutory parametric value is 40 mg/l; the measured value represents 27 % of the parametric value. Basis: 2026, retrieved on 07/08/2026.

Who supplies the drinking water in Lengnau AG?

Wasserversorgungsgenossenschaft Lengnau AG. The values shown here come from the supply zone 5426 Lengnau Dorf mit den Weilern Himmelrich und Vogelsang 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 Lengnau AG

One supply zone, water supplier: Wasserversorgungsgenossenschaft Lengnau 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.

5426 Lengnau Dorf mit den Weilern Himmelrich und Vogelsang

Wasserversorgungsgenossenschaft Lengnau AG

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

Water hardness

13.1 °dH

Hardness range medium

Key values 5426 Lengnau Dorf mit den Weilern Himmelrich und Vogelsang
Parameter	Value	Parametric value	Share of the parametric value	Reference
Nitrate	10.77 mg/l	40 mg/l	27 %	Mean · 5426 Lengnau Dorf mit den Weilern Himmelrich und Vogelsang

Show all recorded parameters (6 — most recent value per parameter)

Microbiology (2)

Microbiology – 5426 Lengnau Dorf mit den Weilern Himmelrich und Vogelsang
Parameter	Value	Parametric value	Share of the parametric value	Reference
Aerobic mesophilic bacteria	4.75 KBE/ml	300 1/ml	—	Mean · 5426 Lengnau Dorf mit den Weilern Himmelrich und Vogelsang
Intestinal enterococci	0 KBE/100ml	0/100 ml	—	Maximum · Median 0 · 5426 Lengnau Dorf mit den Weilern Himmelrich und Vogelsang

Chemical parameters (1)

Chemical parameters – 5426 Lengnau Dorf mit den Weilern Himmelrich und Vogelsang
Parameter	Value	Parametric value	Share of the parametric value	Reference
Nitrate	10.77 mg/l	40 mg/l	27 %	Mean · 5426 Lengnau Dorf mit den Weilern Himmelrich und Vogelsang

Further parameters (3)

Further parameters – 5426 Lengnau Dorf mit den Weilern Himmelrich und Vogelsang
Parameter	Value	Parametric value	Share of the parametric value	Reference
Calcium	78.07 mg/l	—	—	Mean · 5426 Lengnau Dorf mit den Weilern Himmelrich und Vogelsang
Magnesium	9.7 mg/l	—	—	Mean · 5426 Lengnau Dorf mit den Weilern Himmelrich und Vogelsang
Total hardness	23.47 °fH	—	—	Mean · 5426 Lengnau Dorf mit den Weilern Himmelrich und Vogelsang

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/1029/wasserversorgungsgenossenschaft-lengnau-ag/3657/5426-lengnau-dorf-mit-den-weilern-himmelrich-und-vogelsang · 2026 · 2026 · retrieved on 07/08/2026

Postcodes in this zone: 5426

Frequently asked questions about drinking water in Lengnau AG

How hard is the water in Lengnau AG?: Wasserversorgungsgenossenschaft Lengnau AG publishes a total hardness of 23.47 °fH for the supply zone 5426 Lengnau Dorf mit den Weilern Himmelrich und Vogelsang — that corresponds to 13.1 °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: 2026, retrieved on 07/08/2026.
How much nitrate is in the drinking water in Lengnau AG?: Wasserversorgungsgenossenschaft Lengnau AG publishes a nitrate value of 10.77 mg/l for the supply zone 5426 Lengnau Dorf mit den Weilern Himmelrich und Vogelsang. The statutory parametric value is 40 mg/l; the measured value represents 27 % of the parametric value. Basis: 2026, retrieved on 07/08/2026.
Who supplies the drinking water in Lengnau AG?: Wasserversorgungsgenossenschaft Lengnau AG. The values shown here come from the supply zone 5426 Lengnau Dorf mit den Weilern Himmelrich und Vogelsang 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.