How hard is the water in Oberweningen, Schleinikon, Schöfflisdorf?

Oberweningen publishes a total hardness of 30 °fH for the supply zone Oberweningen — that corresponds to 16.8 °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 Oberweningen, Schleinikon, Schöfflisdorf?

Oberweningen publishes a nitrate value of 11 mg/l for the supply zone Oberweningen. 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 Oberweningen, Schleinikon, Schöfflisdorf?

Oberweningen. The values shown here come from the supply zone Oberweningen 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 Oberweningen, Schleinikon, Schöfflisdorf

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.

Oberweningen

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

Water hardness

16.8 °dH

Hardness range hard

Key values Oberweningen
Parameter	Value	Parametric value	Share of the parametric value	Reference
Nitrate	11 mg/l	40 mg/l	27 %	Mean · Oberweningen
Escherichia coli (E. coli)	0 KBE/100ml	0/100 ml	—	Maximum · Median 0 · Oberweningen
Sulphate	10.1 mg/l	—	—	Mean · Oberweningen
Sodium	3.6 mg/l	200 mg/l	2 %	Mean · Oberweningen

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

Microbiology (3)

Microbiology – Oberweningen
Parameter	Value	Parametric value	Share of the parametric value	Reference
Aerobic mesophilic bacteria	75 KBE/ml	300 1/ml	—	Mean · Oberweningen
Escherichia coli (E. coli)	0 KBE/100ml	0/100 ml	—	Maximum · Median 0 · Oberweningen
Intestinal enterococci	0 KBE/100ml	0/100 ml	—	Maximum · Median 0 · Oberweningen

Chemical parameters (2)

Chemical parameters – Oberweningen
Parameter	Value	Parametric value	Share of the parametric value	Reference
Fluoride	0.1 mg/l	1.5 mg/l	7 %	Mean · Oberweningen
Nitrate	11 mg/l	40 mg/l	27 %	Mean · Oberweningen

Metabolites (2)

Metabolites – Oberweningen
Parameter	Value	Parametric value	Share of the parametric value	Reference
Chlorothalonil metabolite R417888	0.012 µg/l	0.1 µg/l	12 %	Mean · Oberweningen
Chlorothalonil metabolite R471811	0.31 µg/l	0.1 µg/l	310 % Mean above the parametric value	Mean · Oberweningen

Annual means and medians are not individual measured values, but the parametric values apply per sample. If a mean lies above it, at least one individual sample was above it — the mean does not say how many, or by how much. That is why this is not reported here as an exceedance of the parametric value. What counts remains the water supplier's publication, which each row links to.

Indicator parameters (6)

Indicator parameters – Oberweningen
Parameter	Value	Parametric value	Share of the parametric value	Reference
Chloride	2.7 mg/l	—	—	Mean · Oberweningen
Conductivity (25 °C)	561 µS/cm	—	—	Mean · Oberweningen
pH	7.4	—	—	Mean · Oberweningen
Sodium	3.6 mg/l	200 mg/l	2 %	Mean · Oberweningen
Sulphate	10.1 mg/l	—	—	Mean · Oberweningen
Temperature	11 °C	—	—	Mean · Oberweningen

Further parameters (4)

Further parameters – Oberweningen
Parameter	Value	Parametric value	Share of the parametric value	Reference
Calcium	91 mg/l	—	—	Mean · Oberweningen
Magnesium	18.9 mg/l	—	—	Mean · Oberweningen
Potassium	0.7 mg/l	—	—	Mean · Oberweningen
Total hardness	30 °fH	—	—	Mean · Oberweningen

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/1374/oberweningen/3387/oberweningen · 2026 · 2026 · retrieved on 07/08/2026

Postcodes in this zone: 8165

Show 1 more supply zone

Schöfflisdorf