Who supplies the drinking water in Oensingen?

Wasserversorgung Oensingen. The values shown here come from the supply zone Grundwasserfassung Moos, Oensingen; teilweise Balsthal 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 Oensingen

One supply zone, water supplier: Wasserversorgung Oensingen.

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.

Grundwasserfassung Moos, Oensingen; teilweise Balsthal

Wasserversorgung Oensingen

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

Key values Grundwasserfassung Moos, Oensingen; teilweise Balsthal
Parameter	Value	Parametric value	Share of the parametric value	Reference
Nitrate	7.8 mg pro Liter	40 mg/l	—	Single value
Sulphate	16.4 mg/l	—	—	Single value
Sodium	5.8 mg/l	200 mg/l	3 %	Single value

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

Chemical parameters (1)

Chemical parameters – Grundwasserfassung Moos, Oensingen; teilweise Balsthal
Parameter	Value	Parametric value	Share of the parametric value	Reference
Nitrate	7.8 mg pro Liter	40 mg/l	—	Single value

Metabolites (2)

Metabolites – Grundwasserfassung Moos, Oensingen; teilweise Balsthal
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 % *	Single value · 19.12.2024
Chlorothalonil metabolite R471811	0.05 µg/l	0.1 µg/l	50 %	Single value · 19.12.2024

* 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.

Indicator parameters (2)

Indicator parameters – Grundwasserfassung Moos, Oensingen; teilweise Balsthal
Parameter	Value	Parametric value	Share of the parametric value	Reference
Sodium	5.8 mg/l	200 mg/l	3 %	Single value
Sulphate	16.4 mg/l	—	—	Single value

Further parameters (3)

Further parameters – Grundwasserfassung Moos, Oensingen; teilweise Balsthal
Parameter	Value	Parametric value	Share of the parametric value	Reference
Calcium	92.9 mg/l	—	—	Single value
Magnesium	5.3 mg/l	—	—	Single value
Potassium	1.4 mg/l	—	—	Single value

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://www.oensingen.ch/trinkwasserqualitaet · 19.12.2024 bis 19.12.2025 · retrieved on 12/08/2026

Postcodes in this zone: 4702

Frequently asked questions about drinking water in Oensingen

Who supplies the drinking water in Oensingen?: Wasserversorgung Oensingen. The values shown here come from the supply zone Grundwasserfassung Moos, Oensingen; teilweise Balsthal 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.