How hard is the water in Oberhasli?

Wasserversorgung Gemeinde Niederhasli publishes a total hardness of 23.2 °fH for the supply zone Oberhasli — that corresponds to 13 °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: 2023, retrieved on 07/08/2026.

How much nitrate is in the drinking water in Oberhasli?

Wasserversorgung Gemeinde Niederhasli publishes a nitrate value of 4.3 mg/l for the supply zone Oberhasli. The statutory parametric value is 40 mg/l; the measured value represents 11 % of the parametric value. Basis: 2023, retrieved on 07/08/2026.

Who supplies the drinking water in Oberhasli?

Wasserversorgung Gemeinde Niederhasli. The values shown here come from the supply zone Oberhasli 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 Oberhasli

One supply zone, water supplier: Wasserversorgung Gemeinde Niederhasli.

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.

Oberhasli

Wasserversorgung Gemeinde Niederhasli

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 31/12/2023. 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

13 °dH

Hardness range medium

Key values Oberhasli
Parameter	Value	Parametric value	Share of the parametric value	Reference
Nitrate	4.3 mg/l	40 mg/l	11 %	Mean · Oberhasli
Escherichia coli (E. coli)	0 KBE/100ml	0/100 ml	—	Maximum · Median 0 · Oberhasli
Sulphate	12.4 mg/l	—	—	Mean · Oberhasli
Sodium	5.9 mg/l	200 mg/l	3 %	Mean · Oberhasli

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

Microbiology (3)

Microbiology – Oberhasli
Parameter	Value	Parametric value	Share of the parametric value	Reference
Aerobic mesophilic bacteria	3.3 KBE/ml	300 1/ml	—	Mean · Oberhasli
Escherichia coli (E. coli)	0 KBE/100ml	0/100 ml	—	Maximum · Median 0 · Oberhasli
Intestinal enterococci	0 KBE/100ml	0/100 ml	—	Maximum · Median 0 · Oberhasli

Chemical parameters (2)

Chemical parameters – Oberhasli
Parameter	Value	Parametric value	Share of the parametric value	Reference
Fluoride	< 0.1 mg/l below limit of quantification	1.5 mg/l	< 7 % *	Mean · Oberhasli
Nitrate	4.3 mg/l	40 mg/l	11 %	Mean · Oberhasli

* 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 (6)

Indicator parameters – Oberhasli
Parameter	Value	Parametric value	Share of the parametric value	Reference
Chloride	7 mg/l	—	—	Mean · Oberhasli
Conductivity (25 °C)	426.6 µS/cm	—	—	Mean · Oberhasli
pH	7.6	—	—	Mean · Oberhasli
Sodium	5.9 mg/l	200 mg/l	3 %	Mean · Oberhasli
Sulphate	12.4 mg/l	—	—	Mean · Oberhasli
Temperature	12.3 °C	—	—	Mean · Oberhasli

Further parameters (4)

Further parameters – Oberhasli
Parameter	Value	Parametric value	Share of the parametric value	Reference
Calcium	67.6 mg/l	—	—	Mean · Oberhasli
Magnesium	15.5 mg/l	—	—	Mean · Oberhasli
Potassium	1.2 mg/l	—	—	Mean · Oberhasli
Total hardness	23.2 °fH	—	—	Mean · Oberhasli

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/790/wasserversorgung-gemeinde-niederhasli/2024/oberhasli · 2023 · 2023 · retrieved on 07/08/2026

Postcodes in this zone: 8156

Frequently asked questions about drinking water in Oberhasli

How hard is the water in Oberhasli?: Wasserversorgung Gemeinde Niederhasli publishes a total hardness of 23.2 °fH for the supply zone Oberhasli — that corresponds to 13 °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: 2023, retrieved on 07/08/2026.
How much nitrate is in the drinking water in Oberhasli?: Wasserversorgung Gemeinde Niederhasli publishes a nitrate value of 4.3 mg/l for the supply zone Oberhasli. The statutory parametric value is 40 mg/l; the measured value represents 11 % of the parametric value. Basis: 2023, retrieved on 07/08/2026.
Who supplies the drinking water in Oberhasli?: Wasserversorgung Gemeinde Niederhasli. The values shown here come from the supply zone Oberhasli 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.