How hard is the water in Ganterschwil?

rwt Regionalwerk Toggenburg AG publishes a total hardness of 31.9 °fH for the supply zone Ganterschwil — that corresponds to 17.9 °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 Ganterschwil?

rwt Regionalwerk Toggenburg AG publishes a nitrate value of 26.8 mg/l for the supply zone Ganterschwil. The statutory parametric value is 40 mg/l; the measured value represents 67 % of the parametric value. Basis: 2025, retrieved on 07/08/2026.

Who supplies the drinking water in Ganterschwil?

rwt Regionalwerk Toggenburg AG. The values shown here come from the supply zone Ganterschwil 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 Ganterschwil

One supply zone, water supplier: rwt Regionalwerk Toggenburg AG.

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.

Ganterschwil

rwt Regionalwerk Toggenburg AG

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

Water hardness

17.9 °dH

Hardness range hard

Key values Ganterschwil
Parameter	Value	Parametric value	Share of the parametric value	Reference
Nitrate	26.8 mg/l	40 mg/l	67 %	Mean · Ganterschwil
Escherichia coli (E. coli)	0 KBE/100ml	0/100 ml	—	Maximum · Median 0 · Ganterschwil

Show all recorded parameters (7 — most recent value per parameter)

Microbiology (3)

Microbiology – Ganterschwil
Parameter	Value	Parametric value	Share of the parametric value	Reference
Aerobic mesophilic bacteria	8.73 KBE/ml	300 1/ml	—	Mean · Ganterschwil
Escherichia coli (E. coli)	0 KBE/100ml	0/100 ml	—	Maximum · Median 0 · Ganterschwil
Intestinal enterococci	2 KBE/100ml	0/100 ml	above the parametric value — this parameter must not be detectable	Maximum · Median 0 · Ganterschwil

An exceedance of a parametric value does not automatically mean a health risk; the statutory parametric values include safety margins. Assessment and any measures are the responsibility of the competent health authority of the respective country.

Chemical parameters (1)

Chemical parameters – Ganterschwil
Parameter	Value	Parametric value	Share of the parametric value	Reference
Nitrate	26.8 mg/l	40 mg/l	67 %	Mean · Ganterschwil

Further parameters (3)

Further parameters – Ganterschwil
Parameter	Value	Parametric value	Share of the parametric value	Reference
Calcium	93 mg/l	—	—	Mean · Ganterschwil
Magnesium	22 mg/l	—	—	Mean · Ganterschwil
Total hardness	31.9 °fH	—	—	Mean · Ganterschwil

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/838/rwt-regionalwerk-toggenburg-ag/3208/ganterschwil · 2025 · 2025 · retrieved on 07/08/2026

Postcodes in this zone: 9608

Frequently asked questions about drinking water in Ganterschwil

How hard is the water in Ganterschwil?: rwt Regionalwerk Toggenburg AG publishes a total hardness of 31.9 °fH for the supply zone Ganterschwil — that corresponds to 17.9 °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 Ganterschwil?: rwt Regionalwerk Toggenburg AG publishes a nitrate value of 26.8 mg/l for the supply zone Ganterschwil. The statutory parametric value is 40 mg/l; the measured value represents 67 % of the parametric value. Basis: 2025, retrieved on 07/08/2026.
Who supplies the drinking water in Ganterschwil?: rwt Regionalwerk Toggenburg AG. The values shown here come from the supply zone Ganterschwil 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.