How hard is the water in Auslikon?

Gemeindewerke Pfäffikon ZH publishes a total hardness of 26.7 °fH for the supply zone Auslikon — that corresponds to 15 °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 Auslikon?

Gemeindewerke Pfäffikon ZH publishes a nitrate value of 6.05 mg/l for the supply zone Auslikon. The statutory parametric value is 40 mg/l; the measured value represents 15 % of the parametric value. Basis: 2025, retrieved on 07/08/2026.

Who supplies the drinking water in Auslikon?

Gemeindewerke Pfäffikon ZH. The values shown here come from the supply zone Auslikon 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 Auslikon

One supply zone, water supplier: Gemeindewerke Pfäffikon ZH.

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.

Auslikon

Gemeindewerke Pfäffikon ZH

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

Water hardness

15 °dH

Hardness range hard

Key values Auslikon
Parameter	Value	Parametric value	Share of the parametric value	Reference
Nitrate	6.05 mg/l	40 mg/l	15 %	Mean · Auslikon
Escherichia coli (E. coli)	nn not detectable Unit not stated in the document	0/100 ml	—	Maximum · Median nn · Auslikon
Sulphate	8.3 mg/l	—	—	Mean · Auslikon
Sodium	8.6 mg/l	200 mg/l	4 %	Mean · Auslikon

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

Microbiology (3)

Microbiology – Auslikon
Parameter	Value	Parametric value	Share of the parametric value	Reference
Aerobic mesophilic bacteria	16 KBE/ml	300 1/ml	—	Mean · Auslikon
Escherichia coli (E. coli)	nn not detectable Unit not stated in the document	0/100 ml	—	Maximum · Median nn · Auslikon
Intestinal enterococci	nn not detectable Unit not stated in the document	0/100 ml	—	Maximum · Median nn · Auslikon

Chemical parameters (2)

Chemical parameters – Auslikon
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 · Auslikon
Nitrate	6.05 mg/l	40 mg/l	15 %	Mean · Auslikon

* 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.

PFAS (3)

PFAS – Auslikon
Parameter	Value	Parametric value	Share of the parametric value	Reference
Perfluorohexane sulfonic acid (PFHxS)	0 µg/l	0.3 µg/l	0 %	Mean · Auslikon
Perfluorooctanesulfonic acid (PFOS)	0.001 µg/l	0.3 µg/l	0.3 %	Mean · Auslikon
Perfluorooctanoic acid (PFOA)	0.001 µg/l	0.5 µg/l	0.2 %	Mean · Auslikon

Indicator parameters (5)

Indicator parameters – Auslikon
Parameter	Value	Parametric value	Share of the parametric value	Reference
Chloride	12.2 mg/l	—	—	Mean · Auslikon
pH	7.55	—	—	Mean · Auslikon
Sodium	8.6 mg/l	200 mg/l	4 %	Mean · Auslikon
Sulphate	8.3 mg/l	—	—	Mean · Auslikon
Temperature	14.2 °C	—	—	Mean · Auslikon

Further parameters (4)

Further parameters – Auslikon
Parameter	Value	Parametric value	Share of the parametric value	Reference
Calcium	80.45 mg/l	—	—	Mean · Auslikon
Magnesium	16.1 mg/l	—	—	Mean · Auslikon
Potassium	1.525 mg/l	—	—	Mean · Auslikon
Total hardness	26.7 °fH	—	—	Mean · Auslikon

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/851/gemeindewerke-pfaffikon-zh/3529/auslikon · 2025 · 2025 · retrieved on 07/08/2026

Postcodes in this zone: 8331

Frequently asked questions about drinking water in Auslikon

How hard is the water in Auslikon?: Gemeindewerke Pfäffikon ZH publishes a total hardness of 26.7 °fH for the supply zone Auslikon — that corresponds to 15 °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 Auslikon?: Gemeindewerke Pfäffikon ZH publishes a nitrate value of 6.05 mg/l for the supply zone Auslikon. The statutory parametric value is 40 mg/l; the measured value represents 15 % of the parametric value. Basis: 2025, retrieved on 07/08/2026.
Who supplies the drinking water in Auslikon?: Gemeindewerke Pfäffikon ZH. The values shown here come from the supply zone Auslikon 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.