How hard is the water in Sirnach?

EW Sirnach AG 8370 Sirnach publishes a total hardness of 33.68 °fH for the supply zone Sirnach, Littenheid, Busswil, Wiezikon, Horben — that corresponds to 18.9 °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 Sirnach?

EW Sirnach AG 8370 Sirnach publishes a nitrate value of 10.87 mg/l for the supply zone Sirnach, Littenheid, Busswil, Wiezikon, Horben. The statutory parametric value is 40 mg/l; the measured value represents 27 % of the parametric value. Basis: 2025, retrieved on 07/08/2026.

Who supplies the drinking water in Sirnach?

EW Sirnach AG 8370 Sirnach. The values shown here come from the supply zone Sirnach, Littenheid, Busswil, Wiezikon, Horben 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 Sirnach

One supply zone, water supplier: EW Sirnach AG 8370 Sirnach.

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.

Sirnach, Littenheid, Busswil, Wiezikon, Horben

EW Sirnach AG 8370 Sirnach

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

Water hardness

18.9 °dH

Hardness range hard

Key values Sirnach, Littenheid, Busswil, Wiezikon, Horben
Parameter	Value	Parametric value	Share of the parametric value	Reference
Nitrate	10.87 mg/l	40 mg/l	27 %	Mean · Sirnach, Littenheid, Busswil, Wiezikon, Horben
Sulphate	5.59 mg/l	—	—	Mean · Sirnach, Littenheid, Busswil, Wiezikon, Horben
Sodium	5.14 mg/l	200 mg/l	3 %	Mean · Sirnach, Littenheid, Busswil, Wiezikon, Horben

Show all recorded parameters (22 — most recent value per parameter)

Microbiology (1)

Microbiology – Sirnach, Littenheid, Busswil, Wiezikon, Horben
Parameter	Value	Parametric value	Share of the parametric value	Reference
Aerobic mesophilic bacteria	18.6 KBE/ml	300 1/ml	—	Mean · Sirnach, Littenheid, Busswil, Wiezikon, Horben

Chemical parameters (4)

Chemical parameters – Sirnach, Littenheid, Busswil, Wiezikon, Horben
Parameter	Value	Parametric value	Share of the parametric value	Reference
Atrazine	0 µg/l	—	—	Mean · Sirnach, Littenheid, Busswil, Wiezikon, Horben
Desethylatrazine	< 0.003 µg/l below limit of quantification	—	—	Mean · Sirnach, Littenheid, Busswil, Wiezikon, Horben
Metazachlor	0 µg/l	—	—	Mean · Sirnach, Littenheid, Busswil, Wiezikon, Horben
Nitrate	10.87 mg/l	40 mg/l	27 %	Mean · Sirnach, Littenheid, Busswil, Wiezikon, Horben

PFAS (4)

PFAS – Sirnach, Littenheid, Busswil, Wiezikon, Horben
Parameter	Parametric value	Share of the parametric value	Reference
Perfluorodecane sulfonic acid (PFDS)	—	—	Mean · Sirnach, Littenheid, Busswil, Wiezikon, Horben
Perfluorohexane sulfonic acid (PFHxS)	0.3 µg/l	0 %	Mean · Sirnach, Littenheid, Busswil, Wiezikon, Horben
Perfluorooctanesulfonic acid (PFOS)	0.3 µg/l	0 %	Mean · Sirnach, Littenheid, Busswil, Wiezikon, Horben
Perfluorooctanoic acid (PFOA)	0.5 µg/l	0 %	Mean · Sirnach, Littenheid, Busswil, Wiezikon, Horben

Metabolites (2)

Metabolites – Sirnach, Littenheid, Busswil, Wiezikon, Horben
Parameter	Value	Parametric value	Share of the parametric value	Reference
Chlorothalonil metabolite R417888	0 µg/l	0.1 µg/l	0 %	Mean · Sirnach, Littenheid, Busswil, Wiezikon, Horben
Chlorothalonil metabolite R471811	< 0.02 µg/l below limit of quantification	0.1 µg/l	< 20 % *	Mean · Sirnach, Littenheid, Busswil, Wiezikon, Horben

* 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 (7)

Indicator parameters – Sirnach, Littenheid, Busswil, Wiezikon, Horben
Parameter	Value	Parametric value	Share of the parametric value	Reference
Chloride	8.36 mg/l	—	—	Mean · Sirnach, Littenheid, Busswil, Wiezikon, Horben
Conductivity (25 °C)	615 µS/cm	—	—	Mean · Sirnach, Littenheid, Busswil, Wiezikon, Horben
pH	7.39	—	—	Mean · Sirnach, Littenheid, Busswil, Wiezikon, Horben
Sodium	5.14 mg/l	200 mg/l	3 %	Mean · Sirnach, Littenheid, Busswil, Wiezikon, Horben
Sulphate	5.59 mg/l	—	—	Mean · Sirnach, Littenheid, Busswil, Wiezikon, Horben
Temperature	15.7 °C	—	—	Mean · Sirnach, Littenheid, Busswil, Wiezikon, Horben
Turbidity	0.015 TE/F	—	—	Mean · Sirnach, Littenheid, Busswil, Wiezikon, Horben

Further parameters (4)

Further parameters – Sirnach, Littenheid, Busswil, Wiezikon, Horben
Parameter	Value	Parametric value	Share of the parametric value	Reference
Calcium	92.93 mg/l	—	—	Mean · Sirnach, Littenheid, Busswil, Wiezikon, Horben
Magnesium	25.52 mg/l	—	—	Mean · Sirnach, Littenheid, Busswil, Wiezikon, Horben
Potassium	1.58 mg/l	—	—	Mean · Sirnach, Littenheid, Busswil, Wiezikon, Horben
Total hardness	33.68 °fH	—	—	Mean · Sirnach, Littenheid, Busswil, Wiezikon, Horben

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/994/ew-sirnach-ag-8370-sirnach/3197/sirnach-littenheid-busswil-wiezikon-horben · 2025 · 2025 · retrieved on 07/08/2026

Postcodes in this zone: 8370

Frequently asked questions about drinking water in Sirnach

How hard is the water in Sirnach?: EW Sirnach AG 8370 Sirnach publishes a total hardness of 33.68 °fH for the supply zone Sirnach, Littenheid, Busswil, Wiezikon, Horben — that corresponds to 18.9 °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 Sirnach?: EW Sirnach AG 8370 Sirnach publishes a nitrate value of 10.87 mg/l for the supply zone Sirnach, Littenheid, Busswil, Wiezikon, Horben. The statutory parametric value is 40 mg/l; the measured value represents 27 % of the parametric value. Basis: 2025, retrieved on 07/08/2026.
Who supplies the drinking water in Sirnach?: EW Sirnach AG 8370 Sirnach. The values shown here come from the supply zone Sirnach, Littenheid, Busswil, Wiezikon, Horben 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.