How hard is the water in Flaach?

Wasserversorgung Flaach publishes a total hardness of 34.75 °fH for the supply zone Gemeinde Flaach — that corresponds to 19.5 °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: 2024, retrieved on 07/08/2026.

How much nitrate is in the drinking water in Flaach?

Wasserversorgung Flaach publishes a nitrate value of 6.325 mg/l for the supply zone Gemeinde Flaach. The statutory parametric value is 40 mg/l; the measured value represents 16 % of the parametric value. Basis: 2024, retrieved on 07/08/2026.

Who supplies the drinking water in Flaach?

Wasserversorgung Flaach. The values shown here come from the supply zone Gemeinde Flaach 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 Flaach

One supply zone, water supplier: Wasserversorgung Flaach.

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.

Gemeinde Flaach

Wasserversorgung Flaach

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

These values are more than a year old. The most recent analysis the water supplier has published for this zone dates from 31/12/2024. We have no newer values — which is why we show the latest available ones rather than none at all. They say nothing about how the water has changed since then.

Water hardness

19.5 °dH

Hardness range hard

Key values Gemeinde Flaach
Parameter	Value	Parametric value	Share of the parametric value	Reference
Nitrate	6.325 mg/l	40 mg/l	16 %	Mean · Gemeinde Flaach
Escherichia coli (E. coli)	0 KBE/100ml	0/100 ml	—	Maximum · Median 0 · Gemeinde Flaach
Sulphate	45.7 mg/l	—	—	Mean · Gemeinde Flaach
Sodium	2.95 mg/l	200 mg/l	1 %	Mean · Gemeinde Flaach

Show all recorded parameters (15 — most recent value per parameter)

Microbiology (3)

Microbiology – Gemeinde Flaach
Parameter	Value	Parametric value	Share of the parametric value	Reference
Aerobic mesophilic bacteria	1.25 KBE/ml	300 1/ml	—	Mean · Gemeinde Flaach
Escherichia coli (E. coli)	0 KBE/100ml	0/100 ml	—	Maximum · Median 0 · Gemeinde Flaach
Intestinal enterococci	0 KBE/100ml	0/100 ml	—	Maximum · Median 0 · Gemeinde Flaach

Chemical parameters (2)

Chemical parameters – Gemeinde Flaach
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 · Gemeinde Flaach
Nitrate	6.325 mg/l	40 mg/l	16 %	Mean · Gemeinde Flaach

* 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.

Metabolites (1)

Metabolites – Gemeinde Flaach
Parameter	Value	Parametric value	Share of the parametric value	Reference
Chlorothalonil metabolite R471811	0.086 µg/l	0.1 µg/l	86 %	Mean · Gemeinde Flaach

Indicator parameters (5)

Indicator parameters – Gemeinde Flaach
Parameter	Value	Parametric value	Share of the parametric value	Reference
Chloride	1.95 mg/l	—	—	Mean · Gemeinde Flaach
pH	7.275	—	—	Mean · Gemeinde Flaach
Sodium	2.95 mg/l	200 mg/l	1 %	Mean · Gemeinde Flaach
Sulphate	45.7 mg/l	—	—	Mean · Gemeinde Flaach
Temperature	12.75 °C	—	—	Mean · Gemeinde Flaach

Further parameters (4)

Further parameters – Gemeinde Flaach
Parameter	Value	Parametric value	Share of the parametric value	Reference
Calcium	97.85 mg/l	—	—	Mean · Gemeinde Flaach
Magnesium	25.75 mg/l	—	—	Mean · Gemeinde Flaach
Potassium	0.775 mg/l	—	—	Mean · Gemeinde Flaach
Total hardness	34.75 °fH	—	—	Mean · Gemeinde Flaach

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/1044/wasserversorgung-flaach/2976/gemeinde-flaach · 2024 · 2024 · retrieved on 07/08/2026

Postcodes in this zone: 8416

Frequently asked questions about drinking water in Flaach

How hard is the water in Flaach?: Wasserversorgung Flaach publishes a total hardness of 34.75 °fH for the supply zone Gemeinde Flaach — that corresponds to 19.5 °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: 2024, retrieved on 07/08/2026.
How much nitrate is in the drinking water in Flaach?: Wasserversorgung Flaach publishes a nitrate value of 6.325 mg/l for the supply zone Gemeinde Flaach. The statutory parametric value is 40 mg/l; the measured value represents 16 % of the parametric value. Basis: 2024, retrieved on 07/08/2026.
Who supplies the drinking water in Flaach?: Wasserversorgung Flaach. The values shown here come from the supply zone Gemeinde Flaach 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.