Who supplies the drinking water in Linz, Ansfelden?

Industrielle Werke Basel (IWB). The values shown here come from the supply zone IWB-Wassernetz 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 Linz, Ansfelden

One supply zone, water supplier: Industrielle Werke Basel (IWB).

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.

IWB-Wassernetz

Industrielle Werke Basel (IWB)

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

Key values IWB-Wassernetz
Parameter	Value	Parametric value	Share of the parametric value	Reference
Escherichia coli (E. coli)	nicht nachgewiesen not detectable Unit not stated in the document	0/100 ml	—	Maximum · IWB-Wassernetz

Show all recorded parameters (4 — most recent value per parameter)

Microbiology (3)

Microbiology – IWB-Wassernetz
Parameter	Value	Parametric value	Share of the parametric value	Reference
Aerobic mesophilic bacteria	27 KbE/ml	300 1/ml	—	Maximum · IWB-Wassernetz
Escherichia coli (E. coli)	nicht nachgewiesen not detectable Unit not stated in the document	0/100 ml	—	Maximum · IWB-Wassernetz
Intestinal enterococci	nicht nachgewiesen not detectable Unit not stated in the document	0/100 ml	—	Maximum · IWB-Wassernetz

PFAS (1)

PFAS – IWB-Wassernetz
Parameter	Value	Parametric value	Share of the parametric value	Reference
Trifluoroacetic acid (TFA)	0.48 µg/L	—	—	Maximum · IWB-Wassernetz

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://media.bs.ch/original_file/0f3d8c8a3676007d48b2d10dc195b5945300c040/2025-trinkwasser-mik-chem.pdf · 13.04.2026 · 2025 · retrieved on 19/08/2026

Postcodes in this zone: 4052

Frequently asked questions about drinking water in Linz, Ansfelden

Who supplies the drinking water in Linz, Ansfelden?: Industrielle Werke Basel (IWB). The values shown here come from the supply zone IWB-Wassernetz 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.