Drinking water in Schwyz
2 supply zones — values can differ depending on the district. Below is the zone with the most documented parameters, the others collapsed underneath. To determine the exact match, look up the postcode.
How to read the share of the parametric value
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.
Loo-Obdorf
Wasserversorgungsgenossenschaft Loo-ObdorfAssigned via the water supplier — the exact supply zone boundary within the postcode is not yet linked.
| Parameter | Value | Parametric value | Share of the parametric value | Reference |
|---|---|---|---|---|
| Nitrate | 5.8 mg/l | 40 mg/l | 14 % | Mean · Loo-Obdorf |
| Escherichia coli (E. coli) | 1 KBE/100ml | 0/100 ml | above the parametric value — this parameter must not be detectable | Maximum · Median 0 · Loo-Obdorf |
| Sulphate | 10.4 mg/l | — | — | Mean · Loo-Obdorf |
| Sodium | 0.015 mg/l | 200 mg/l | < 0.1 % | Mean · Loo-Obdorf |
An exceedance of a parametric value does not automatically mean a health risk; the statutory parametric values include safety margins. Assessment and any measures are the responsibility of the competent health authority of the respective country.
Show all recorded parameters (16 — most recent value per parameter)
Microbiology (3)
| Parameter | Value | Parametric value | Share of the parametric value | Reference |
|---|---|---|---|---|
| Aerobic mesophilic bacteria | 7 KBE/ml | 300 1/ml | — | Mean · Loo-Obdorf |
| Escherichia coli (E. coli) | 1 KBE/100ml | 0/100 ml | above the parametric value — this parameter must not be detectable | Maximum · Median 0 · Loo-Obdorf |
| Intestinal enterococci | 1 KBE/100ml | 0/100 ml | above the parametric value — this parameter must not be detectable | Maximum · Median 0 · Loo-Obdorf |
An exceedance of a parametric value does not automatically mean a health risk; the statutory parametric values include safety margins. Assessment and any measures are the responsibility of the competent health authority of the respective country.
Chemical parameters (1)
| Parameter | Value | Parametric value | Share of the parametric value | Reference |
|---|---|---|---|---|
| Nitrate | 5.8 mg/l | 40 mg/l | 14 % | Mean · Loo-Obdorf |
Indicator parameters (7)
| Parameter | Value | Parametric value | Share of the parametric value | Reference |
|---|---|---|---|---|
| Chloride | 1 mg/l | — | — | Mean · Loo-Obdorf |
| Conductivity (25 °C) | 258 µS/cm | — | — | Mean · Loo-Obdorf |
| pH | 2.35 | — | — | Mean · Loo-Obdorf |
| Sodium | 0.015 mg/l | 200 mg/l | < 0.1 % | Mean · Loo-Obdorf |
| Sulphate | 10.4 mg/l | — | — | Mean · Loo-Obdorf |
| Temperature | 7.6 °C | — | — | Mean · Loo-Obdorf |
| Turbidity | 0.35 TE/F | — | — | Mean · Loo-Obdorf |
Further parameters (5)
| Parameter | Value | Parametric value | Share of the parametric value | Reference |
|---|---|---|---|---|
| Calcium | 48 mg/l | — | — | Mean · Loo-Obdorf |
| Hydrogen carbonate | 13.2 mg/l | — | — | Mean · Loo-Obdorf |
| Magnesium | 3 mg/l | — | — | Mean · Loo-Obdorf |
| Spectral absorption coefficient 254 nm (SAC 254) | 3.2 1/m | — | — | Mean · Loo-Obdorf |
| Total hardness | 13.1 °fH | — | — | Mean · Loo-Obdorf |
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.
Postcodes in this zone: 6430
Show 1 more supply zone
Schwyz, Seewen, Ibach, Rickenbach
Dorfgenossenschaft SchwyzAssigned via the water supplier — the exact supply zone boundary within the postcode is not yet linked.
| Parameter | Value | Parametric value | Share of the parametric value | Reference |
|---|---|---|---|---|
| Nitrate | 4.6 mg/l | 40 mg/l | 12 % | Mean · Schwyz, Seewen, Ibach, Rickenbach |
| Escherichia coli (E. coli) | nn not detectable Unit not stated in the document | 0/100 ml | — | Maximum · Median nn · Schwyz, Seewen, Ibach, Rickenbach |
Show all recorded parameters (7 — most recent value per parameter)
Microbiology (3)
| Parameter | Value | Parametric value | Share of the parametric value | Reference |
|---|---|---|---|---|
| Aerobic mesophilic bacteria | 9 KBE/ml | 300 1/ml | — | Mean · Schwyz, Seewen, Ibach, Rickenbach |
| Escherichia coli (E. coli) | nn not detectable Unit not stated in the document | 0/100 ml | — | Maximum · Median nn · Schwyz, Seewen, Ibach, Rickenbach |
| Intestinal enterococci | nn not detectable Unit not stated in the document | 0/100 ml | — | Maximum · Median nn · Schwyz, Seewen, Ibach, Rickenbach |
Chemical parameters (1)
| Parameter | Value | Parametric value | Share of the parametric value | Reference |
|---|---|---|---|---|
| Nitrate | 4.6 mg/l | 40 mg/l | 12 % | Mean · Schwyz, Seewen, Ibach, Rickenbach |
Further parameters (3)
| Parameter | Value | Parametric value | Share of the parametric value | Reference |
|---|---|---|---|---|
| Calcium | 77.3 mg/l | — | — | Mean · Schwyz, Seewen, Ibach, Rickenbach |
| Magnesium | 5.6 mg/l | — | — | Mean · Schwyz, Seewen, Ibach, Rickenbach |
| Total hardness | 21.6 °fH | — | — | Mean · Schwyz, Seewen, Ibach, Rickenbach |
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.
Postcodes in this zone: 6430
Frequently asked questions about drinking water in Schwyz
- How hard is the water in Schwyz?
- Wasserversorgungsgenossenschaft Loo-Obdorf publishes a total hardness of 13.1 °fH for the supply zone Loo-Obdorf — that corresponds to 7.3 °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 Schwyz?
- Wasserversorgungsgenossenschaft Loo-Obdorf publishes a nitrate value of 5.8 mg/l for the supply zone Loo-Obdorf. The statutory parametric value is 40 mg/l; the measured value represents 14 % of the parametric value. Basis: 2025, retrieved on 07/08/2026.
- Who supplies the drinking water in Schwyz?
- Wasserversorgungsgenossenschaft Loo-Obdorf. The values shown here come from the supply zone Loo-Obdorf 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.