How hard is the water in Teufen ZH?

Freienstein-Teufen publishes a total hardness of 33 °fH for the supply zone Freienstein-Teufen — that corresponds to 18.5 °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 Teufen ZH?

Freienstein-Teufen publishes a nitrate value of 15 mg/l for the supply zone Freienstein-Teufen. The statutory parametric value is 40 mg/l; the measured value represents 38 % of the parametric value. Basis: 2026, retrieved on 07/08/2026.

Who supplies the drinking water in Teufen ZH?

Freienstein-Teufen. The values shown here come from the supply zone Freienstein-Teufen 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 Teufen ZH

One supply zone, water supplier: Freienstein-Teufen.

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.

Freienstein-Teufen

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

Water hardness

18.5 °dH

Hardness range hard

Key values Freienstein-Teufen
Parameter	Value	Parametric value	Share of the parametric value	Reference
Nitrate	15 mg/l	40 mg/l	38 %	Mean · Freienstein-Teufen
Escherichia coli (E. coli)	0 KBE/100ml	0/100 ml	—	Maximum · Median 0 · Freienstein-Teufen
Sulphate	14 mg/l	—	—	Mean · Freienstein-Teufen
Sodium	5 mg/l	200 mg/l	3 %	Mean · Freienstein-Teufen

Show all recorded parameters (19 — most recent value per parameter)

Microbiology (3)

Microbiology – Freienstein-Teufen
Parameter	Value	Parametric value	Share of the parametric value	Reference
Aerobic mesophilic bacteria	18 KBE/ml	300 1/ml	—	Mean · Freienstein-Teufen
Escherichia coli (E. coli)	0 KBE/100ml	0/100 ml	—	Maximum · Median 0 · Freienstein-Teufen
Intestinal enterococci	0 KBE/100ml	0/100 ml	—	Maximum · Median 0 · Freienstein-Teufen

Chemical parameters (2)

Chemical parameters – Freienstein-Teufen
Parameter	Value	Parametric value	Share of the parametric value	Reference
Fluoride	0.1 mg/l	1.5 mg/l	7 %	Mean · Freienstein-Teufen
Nitrate	15 mg/l	40 mg/l	38 %	Mean · Freienstein-Teufen

PFAS (2)

PFAS – Freienstein-Teufen
Parameter	Value	Parametric value	Share of the parametric value	Reference
Perfluorooctanesulfonic acid (PFOS)	0.001 µg/l	0.3 µg/l	0.3 %	Mean · Freienstein-Teufen
Perfluorooctanoic acid (PFOA)	0.001 µg/l	0.5 µg/l	0.2 %	Mean · Freienstein-Teufen

Metabolites (2)

Metabolites – Freienstein-Teufen
Parameter	Value	Parametric value	Share of the parametric value	Reference
Chlorothalonil metabolite R417888	0.02 µg/l	0.1 µg/l	20 %	Mean · Freienstein-Teufen
Chlorothalonil metabolite R471811	0.06 µg/l	0.1 µg/l	60 %	Mean · Freienstein-Teufen

Indicator parameters (6)

Indicator parameters – Freienstein-Teufen
Parameter	Value	Parametric value	Share of the parametric value	Reference
Chloride	5.9 mg/l	—	—	Mean · Freienstein-Teufen
Conductivity (25 °C)	544 µS/cm	—	—	Mean · Freienstein-Teufen
pH	7.4	—	—	Mean · Freienstein-Teufen
Sodium	5 mg/l	200 mg/l	3 %	Mean · Freienstein-Teufen
Sulphate	14 mg/l	—	—	Mean · Freienstein-Teufen
Temperature	10 °C	—	—	Mean · Freienstein-Teufen

Further parameters (4)

Further parameters – Freienstein-Teufen
Parameter	Value	Parametric value	Share of the parametric value	Reference
Calcium	98 mg/l	—	—	Mean · Freienstein-Teufen
Magnesium	19 mg/l	—	—	Mean · Freienstein-Teufen
Potassium	1 mg/l	—	—	Mean · Freienstein-Teufen
Total hardness	33 °fH	—	—	Mean · Freienstein-Teufen

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/764/freienstein-teufen/3379/freienstein-teufen · 2026 · 2026 · retrieved on 07/08/2026

Postcodes in this zone: 8428

Frequently asked questions about drinking water in Teufen ZH

How hard is the water in Teufen ZH?: Freienstein-Teufen publishes a total hardness of 33 °fH for the supply zone Freienstein-Teufen — that corresponds to 18.5 °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 Teufen ZH?: Freienstein-Teufen publishes a nitrate value of 15 mg/l for the supply zone Freienstein-Teufen. The statutory parametric value is 40 mg/l; the measured value represents 38 % of the parametric value. Basis: 2026, retrieved on 07/08/2026.
Who supplies the drinking water in Teufen ZH?: Freienstein-Teufen. The values shown here come from the supply zone Freienstein-Teufen 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.