How hard is the water in Niedernsill?

TB Gränichen Wasser AG publishes a total hardness of 32 °fH for the supply zone Gränichen — 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 Niedernsill?

TB Gränichen Wasser AG publishes a nitrate value of 15 mg/l for the supply zone Gränichen. The statutory parametric value is 40 mg/l; the measured value represents 38 % of the parametric value. Basis: 2025, retrieved on 07/08/2026.

Who supplies the drinking water in Niedernsill?

TB Gränichen Wasser AG. The values shown here come from the supply zone Gränichen 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 Niedernsill

One supply zone, water supplier: TB Gränichen Wasser 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.

Gränichen

TB Gränichen Wasser 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 Gränichen
Parameter	Value	Parametric value	Share of the parametric value	Reference
Nitrate	15 mg/l	40 mg/l	38 %	Mean · Gränichen
Escherichia coli (E. coli)	nn not detectable Unit not stated in the document	0/100 ml	—	Maximum · Median nn · Gränichen

Show all recorded parameters (9 — most recent value per parameter)

Microbiology (3)

Microbiology – Gränichen
Parameter	Value	Parametric value	Share of the parametric value	Reference
Aerobic mesophilic bacteria	2 KBE/ml	300 1/ml	—	Mean · Gränichen
Escherichia coli (E. coli)	nn not detectable Unit not stated in the document	0/100 ml	—	Maximum · Median nn · Gränichen
Intestinal enterococci	nn not detectable Unit not stated in the document	0/100 ml	—	Maximum · Median nn · Gränichen

Chemical parameters (1)

Chemical parameters – Gränichen
Parameter	Value	Parametric value	Share of the parametric value	Reference
Nitrate	15 mg/l	40 mg/l	38 %	Mean · Gränichen

Metabolites (2)

Metabolites – Gränichen
Parameter	Value	Parametric value	Share of the parametric value	Reference
Chlorothalonil metabolite R417888	< 0.02 µg/l below limit of quantification	0.1 µg/l	< 20 % *	Mean · Gränichen
Chlorothalonil metabolite R471811	< 0.02 µg/l below limit of quantification	0.1 µg/l	< 20 % *	Mean · Gränichen

* 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.

Further parameters (3)

Further parameters – Gränichen
Parameter	Value	Parametric value	Share of the parametric value	Reference
Calcium	90.66 mg/l	—	—	Mean · Gränichen
Magnesium	11.56 mg/l	—	—	Mean · Gränichen
Total hardness	32 °fH	—	—	Mean · Gränichen

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/1240/tb-granichen-wasser-ag/3610/granichen · 2025 · 2025 · retrieved on 07/08/2026

Postcodes in this zone: 5722

Frequently asked questions about drinking water in Niedernsill

How hard is the water in Niedernsill?: TB Gränichen Wasser AG publishes a total hardness of 32 °fH for the supply zone Gränichen — 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 Niedernsill?: TB Gränichen Wasser AG publishes a nitrate value of 15 mg/l for the supply zone Gränichen. The statutory parametric value is 40 mg/l; the measured value represents 38 % of the parametric value. Basis: 2025, retrieved on 07/08/2026.
Who supplies the drinking water in Niedernsill?: TB Gränichen Wasser AG. The values shown here come from the supply zone Gränichen 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.