Drinking water in Katsdorf, St. Georgen an der Gusen
One supply zone, water supplier: Wasserverbund Birstal (WVB).
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.
WVB bestehend aus den Wasserversorgungsgemeinden: Zwingen, Blauen, Laufen, Nenzlingen
Wasserverbund Birstal (WVB)Assigned via the water supplier — the exact supply zone boundary within the postcode is not yet linked.
Water hardness
14.4 °dH
Hardness range hard
| Parameter | Value | Parametric value | Share of the parametric value | Reference |
|---|---|---|---|---|
| Nitrate | 10.55 mg/l | 40 mg/l | 26 % | Mean · WVB bestehend aus den Wasserversorgungsgemeinden: Zwingen, Blauen, Laufen, Nenzlingen |
| Escherichia coli (E. coli) | 0 KBE/100ml | 0/100 ml | — | Maximum · Median 0 · WVB bestehend aus den Wasserversorgungsgemeinden: Zwingen, Blauen, Laufen, Nenzlingen |
| Sulphate | < 10 mg/l below limit of quantification | — | — | Mean · WVB bestehend aus den Wasserversorgungsgemeinden: Zwingen, Blauen, Laufen, Nenzlingen |
| Sodium | 6.91 mg/l | 200 mg/l | 3 % | Mean · WVB bestehend aus den Wasserversorgungsgemeinden: Zwingen, Blauen, Laufen, Nenzlingen |
Show all recorded parameters (22 — most recent value per parameter)
Microbiology (3)
| Parameter | Value | Parametric value | Share of the parametric value | Reference |
|---|---|---|---|---|
| Aerobic mesophilic bacteria | 51 KBE/ml | 300 1/ml | — | Mean · WVB bestehend aus den Wasserversorgungsgemeinden: Zwingen, Blauen, Laufen, Nenzlingen |
| Escherichia coli (E. coli) | 0 KBE/100ml | 0/100 ml | — | Maximum · Median 0 · WVB bestehend aus den Wasserversorgungsgemeinden: Zwingen, Blauen, Laufen, Nenzlingen |
| Intestinal enterococci | 0 KBE/100ml | 0/100 ml | — | Maximum · Median 0 · WVB bestehend aus den Wasserversorgungsgemeinden: Zwingen, Blauen, Laufen, Nenzlingen |
Chemical parameters (2)
| Parameter | Value | Parametric value | Share of the parametric value | Reference |
|---|---|---|---|---|
| Fluoride | 0.05 mg/l | 1.5 mg/l | 3 % | Mean · WVB bestehend aus den Wasserversorgungsgemeinden: Zwingen, Blauen, Laufen, Nenzlingen |
| Nitrate | 10.55 mg/l | 40 mg/l | 26 % | Mean · WVB bestehend aus den Wasserversorgungsgemeinden: Zwingen, Blauen, Laufen, Nenzlingen |
PFAS (3)
| Parameter | Value | Parametric value | Share of the parametric value | Reference |
|---|---|---|---|---|
| Perfluorohexane sulfonic acid (PFHxS) | < 0.004 µg/l below limit of quantification | 0.3 µg/l | < 1 % * | Mean · WVB bestehend aus den Wasserversorgungsgemeinden: Zwingen, Blauen, Laufen, Nenzlingen |
| Perfluorooctanesulfonic acid (PFOS) | < 0.004 µg/l below limit of quantification | 0.3 µg/l | < 1 % * | Mean · WVB bestehend aus den Wasserversorgungsgemeinden: Zwingen, Blauen, Laufen, Nenzlingen |
| Perfluorooctanoic acid (PFOA) | < 0.004 µg/l below limit of quantification | 0.5 µg/l | < 0.8 % * | Mean · WVB bestehend aus den Wasserversorgungsgemeinden: Zwingen, Blauen, Laufen, Nenzlingen |
* 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 (2)
| Parameter | Value | Parametric value | Share of the parametric value | Reference |
|---|---|---|---|---|
| Chlorothalonil metabolite R417888 | < 0.01 µg/l below limit of quantification | 0.1 µg/l | < 10 % * | Mean · WVB bestehend aus den Wasserversorgungsgemeinden: Zwingen, Blauen, Laufen, Nenzlingen |
| Chlorothalonil metabolite R471811 | < 0.03 µg/l below limit of quantification | 0.1 µg/l | < 30 % * | Mean · WVB bestehend aus den Wasserversorgungsgemeinden: Zwingen, Blauen, Laufen, Nenzlingen |
* 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.
Indicator parameters (8)
| Parameter | Value | Parametric value | Share of the parametric value | Reference |
|---|---|---|---|---|
| Chloride | 9.6 mg/l | — | — | Mean · WVB bestehend aus den Wasserversorgungsgemeinden: Zwingen, Blauen, Laufen, Nenzlingen |
| Conductivity (25 °C) | 513.5 µS/cm | — | — | Mean · WVB bestehend aus den Wasserversorgungsgemeinden: Zwingen, Blauen, Laufen, Nenzlingen |
| Oxidisability | 2.02 mg KMnO4/l | — | — | Mean · WVB bestehend aus den Wasserversorgungsgemeinden: Zwingen, Blauen, Laufen, Nenzlingen |
| pH | 7.46 | — | — | Mean · WVB bestehend aus den Wasserversorgungsgemeinden: Zwingen, Blauen, Laufen, Nenzlingen |
| Sodium | 6.91 mg/l | 200 mg/l | 3 % | Mean · WVB bestehend aus den Wasserversorgungsgemeinden: Zwingen, Blauen, Laufen, Nenzlingen |
| Sulphate | < 10 mg/l below limit of quantification | — | — | Mean · WVB bestehend aus den Wasserversorgungsgemeinden: Zwingen, Blauen, Laufen, Nenzlingen |
| Temperature | 10.7 °C | — | — | Mean · WVB bestehend aus den Wasserversorgungsgemeinden: Zwingen, Blauen, Laufen, Nenzlingen |
| Turbidity | 0.138 TE/F | — | — | Mean · WVB bestehend aus den Wasserversorgungsgemeinden: Zwingen, Blauen, Laufen, Nenzlingen |
Further parameters (4)
| Parameter | Value | Parametric value | Share of the parametric value | Reference |
|---|---|---|---|---|
| Calcium | 103 mg/l | — | — | Mean · WVB bestehend aus den Wasserversorgungsgemeinden: Zwingen, Blauen, Laufen, Nenzlingen |
| Magnesium | < 2.5 mg/l below limit of quantification | — | — | Mean · WVB bestehend aus den Wasserversorgungsgemeinden: Zwingen, Blauen, Laufen, Nenzlingen |
| Potassium | < 1.25 mg/l below limit of quantification | — | — | Mean · WVB bestehend aus den Wasserversorgungsgemeinden: Zwingen, Blauen, Laufen, Nenzlingen |
| Total hardness | 25.8 °fH | — | — | Mean · WVB bestehend aus den Wasserversorgungsgemeinden: Zwingen, Blauen, Laufen, Nenzlingen |
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/1194/wasserverbund-birstal-wvb/3410/wvb-bestehend-aus-den-wasserversorgungsgemeinden-zwingen-blauen-laufen-nenzlingen · 2025 · 2025 · retrieved on 07/08/2026
Postcodes in this zone: 4223
Frequently asked questions about drinking water in Katsdorf, St. Georgen an der Gusen
- How hard is the water in Katsdorf, St. Georgen an der Gusen?
- Wasserverbund Birstal (WVB) publishes a total hardness of 25.8 °fH for the supply zone WVB bestehend aus den Wasserversorgungsgemeinden: Zwingen, Blauen, Laufen, Nenzlingen — that corresponds to 14.4 °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 Katsdorf, St. Georgen an der Gusen?
- Wasserverbund Birstal (WVB) publishes a nitrate value of 10.55 mg/l for the supply zone WVB bestehend aus den Wasserversorgungsgemeinden: Zwingen, Blauen, Laufen, Nenzlingen. The statutory parametric value is 40 mg/l; the measured value represents 26 % of the parametric value. Basis: 2025, retrieved on 07/08/2026.
- Who supplies the drinking water in Katsdorf, St. Georgen an der Gusen?
- Wasserverbund Birstal (WVB). The values shown here come from the supply zone WVB bestehend aus den Wasserversorgungsgemeinden: Zwingen, Blauen, Laufen, Nenzlingen 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.