How hard is the water in Liestal?

Stadt Liestal publishes a total hardness of 35.3 °fH for the supply zone Liestal — that corresponds to 19.8 °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 Liestal?

Stadt Liestal publishes a nitrate value of 17.3 mg/l for the supply zone Liestal. 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 Liestal?

Stadt Liestal. The values shown here come from the supply zone Liestal 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 Liestal

One supply zone, water supplier: Stadt Liestal.

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.

Liestal

Stadt Liestal

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

Water hardness

19.8 °dH

Hardness range hard

Key values Liestal
Parameter	Value	Parametric value	Share of the parametric value	Reference
Nitrate	17.3 mg/l	40 mg/l	43 %	Mean · Liestal
Escherichia coli (E. coli)	0 KBE/100ml	0/100 ml	—	Maximum · Median 0 · Liestal
Sulphate	79 mg/l	—	—	Mean · Liestal
Sodium	17.1 mg/l	200 mg/l	9 %	Mean · Liestal

Show all recorded parameters (20 — most recent value per parameter)

Microbiology (3)

Microbiology – Liestal
Parameter	Value	Parametric value	Share of the parametric value	Reference
Aerobic mesophilic bacteria	24 KBE/ml	300 1/ml	—	Mean · Liestal
Escherichia coli (E. coli)	0 KBE/100ml	0/100 ml	—	Maximum · Median 0 · Liestal
Intestinal enterococci	0 KBE/100ml	0/100 ml	—	Maximum · Median 0 · Liestal

Chemical parameters (2)

Chemical parameters – Liestal
Parameter	Value	Parametric value	Share of the parametric value	Reference
Fluoride	0.2 mg/l	1.5 mg/l	13 %	Mean · Liestal
Nitrate	17.3 mg/l	40 mg/l	43 %	Mean · Liestal

PFAS (3)

PFAS – Liestal
Parameter	Value	Parametric value	Share of the parametric value	Reference
Perfluorohexane sulfonic acid (PFHxS)	0.012 µg/l	0.3 µg/l	4 %	Mean · Liestal
Perfluorooctanesulfonic acid (PFOS)	0.012 µg/l	0.3 µg/l	4 %	Mean · Liestal
Perfluorooctanoic acid (PFOA)	0.012 µg/l	0.5 µg/l	2 %	Mean · Liestal

Indicator parameters (7)

Indicator parameters – Liestal
Parameter	Value	Parametric value	Share of the parametric value	Reference
Chloride	22.6 mg/l	—	—	Mean · Liestal
Conductivity (25 °C)	679 µS/cm	—	—	Mean · Liestal
pH	7.36	—	—	Mean · Liestal
Sodium	17.1 mg/l	200 mg/l	9 %	Mean · Liestal
Sulphate	79 mg/l	—	—	Mean · Liestal
Temperature	12.7 °C	—	—	Mean · Liestal
Turbidity	0.12 TE/F	—	—	Mean · Liestal

Further parameters (5)

Further parameters – Liestal
Parameter	Value	Parametric value	Share of the parametric value	Reference
Calcium	122 mg/l	—	—	Mean · Liestal
Magnesium	12.2 mg/l	—	—	Mean · Liestal
Potassium	3.41 mg/l	—	—	Mean · Liestal
Spectral absorption coefficient 254 nm (SAC 254)	1.6 1/m	—	—	Mean · Liestal
Total hardness	35.3 °fH	—	—	Mean · Liestal

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/1117/stadt-liestal/3696/liestal · 2025 · 2025 · retrieved on 07/08/2026

Postcodes in this zone: 4410

Frequently asked questions about drinking water in Liestal

How hard is the water in Liestal?: Stadt Liestal publishes a total hardness of 35.3 °fH for the supply zone Liestal — that corresponds to 19.8 °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 Liestal?: Stadt Liestal publishes a nitrate value of 17.3 mg/l for the supply zone Liestal. 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 Liestal?: Stadt Liestal. The values shown here come from the supply zone Liestal 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.