How hard is the water in Birsfelden?

Birsfelden publishes a total hardness of 26.5 °fH for the supply zone Gemeinde Birsfelden — that corresponds to 14.8 °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 Birsfelden?

Birsfelden publishes a nitrate value of 17.3 mg/l for the supply zone Gemeinde Birsfelden. The statutory parametric value is 40 mg/l; the measured value represents 43 % of the parametric value. Basis: 2025, retrieved on 07/08/2026.

Who supplies the drinking water in Birsfelden?

Birsfelden. The values shown here come from the supply zone Gemeinde Birsfelden 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 Birsfelden

One supply zone, water supplier: Birsfelden.

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 Birsfelden

Birsfelden

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

Water hardness

14.8 °dH

Hardness range hard

Key values Gemeinde Birsfelden
Parameter	Value	Parametric value	Share of the parametric value	Reference
Nitrate	17.3 mg/l	40 mg/l	43 %	Mean · Gemeinde Birsfelden
Escherichia coli (E. coli)	0 KBE/100ml	0/100 ml	—	Maximum · Median 0 · Gemeinde Birsfelden
Sulphate	19.8 mg/l	—	—	Mean · Gemeinde Birsfelden
Sodium	11 mg/l	200 mg/l	5 %	Mean · Gemeinde Birsfelden

Show all recorded parameters (17 — most recent value per parameter)

Microbiology (3)

Microbiology – Gemeinde Birsfelden
Parameter	Value	Parametric value	Share of the parametric value	Reference
Aerobic mesophilic bacteria	23 KBE/ml	300 1/ml	—	Mean · Gemeinde Birsfelden
Escherichia coli (E. coli)	0 KBE/100ml	0/100 ml	—	Maximum · Median 0 · Gemeinde Birsfelden
Intestinal enterococci	0 KBE/100ml	0/100 ml	—	Maximum · Median 0 · Gemeinde Birsfelden

Chemical parameters (2)

Chemical parameters – Gemeinde Birsfelden
Parameter	Value	Parametric value	Share of the parametric value	Reference
Fluoride	0.067 mg/l	1.5 mg/l	4 %	Mean · Gemeinde Birsfelden
Nitrate	17.3 mg/l	40 mg/l	43 %	Mean · Gemeinde Birsfelden

PFAS (1)

PFAS – Gemeinde Birsfelden
Parameter	Value	Parametric value	Share of the parametric value	Reference
Trifluoroacetic acid (TFA)	1 µg/l	—	—	Mean · Gemeinde Birsfelden

Indicator parameters (7)

Indicator parameters – Gemeinde Birsfelden
Parameter	Value	Parametric value	Share of the parametric value	Reference
Chloride	15.7 mg/l	—	—	Mean · Gemeinde Birsfelden
Conductivity (25 °C)	547 µS/cm	—	—	Mean · Gemeinde Birsfelden
pH	7.38	—	—	Mean · Gemeinde Birsfelden
Sodium	11 mg/l	200 mg/l	5 %	Mean · Gemeinde Birsfelden
Sulphate	19.8 mg/l	—	—	Mean · Gemeinde Birsfelden
Temperature	13.2 °C	—	—	Mean · Gemeinde Birsfelden
Turbidity	0.05 TE/F	—	—	Mean · Gemeinde Birsfelden

Further parameters (4)

Further parameters – Gemeinde Birsfelden
Parameter	Value	Parametric value	Share of the parametric value	Reference
Calcium	97.2 mg/l	—	—	Mean · Gemeinde Birsfelden
Magnesium	5.44 mg/l	—	—	Mean · Gemeinde Birsfelden
Potassium	2.53 mg/l	—	—	Mean · Gemeinde Birsfelden
Total hardness	26.5 °fH	—	—	Mean · Gemeinde Birsfelden

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/703/birsfelden/3310/gemeinde-birsfelden · 2025 · 2025 · retrieved on 07/08/2026

Postcodes in this zone: 4127

Frequently asked questions about drinking water in Birsfelden

How hard is the water in Birsfelden?: Birsfelden publishes a total hardness of 26.5 °fH for the supply zone Gemeinde Birsfelden — that corresponds to 14.8 °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 Birsfelden?: Birsfelden publishes a nitrate value of 17.3 mg/l for the supply zone Gemeinde Birsfelden. The statutory parametric value is 40 mg/l; the measured value represents 43 % of the parametric value. Basis: 2025, retrieved on 07/08/2026.
Who supplies the drinking water in Birsfelden?: Birsfelden. The values shown here come from the supply zone Gemeinde Birsfelden 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.