Drinking water in Wynau
4 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
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.
WUL: Mittlere Druckzone Aarwangen-Langenthal
Gemeindeverband Wasserversorgung untere Langete WULAssigned via the water supplier — the exact supply zone boundary within the postcode is not yet linked.
Water hardness
17.3 °dH
Hardness range hard
| Parameter | Value | Parametric value | Share of the parametric value | Reference |
|---|---|---|---|---|
| Nitrate | 22.8 mg/l | 40 mg/l | 57 % | Mean · WUL: Mittlere Druckzone Aarwangen-Langenthal |
| Escherichia coli (E. coli) | 0 KBE/100ml | 0/100 ml | — | Maximum · Median 0 · WUL: Mittlere Druckzone Aarwangen-Langenthal |
| Sulphate | 9.2 mg/l | — | — | Mean · WUL: Mittlere Druckzone Aarwangen-Langenthal |
| Sodium | 7.4 mg/l | 200 mg/l | 4 % | Mean · WUL: Mittlere Druckzone Aarwangen-Langenthal |
Show all recorded parameters (12 — most recent value per parameter)
Microbiology (3)
| Parameter | Value | Parametric value | Share of the parametric value | Reference |
|---|---|---|---|---|
| Aerobic mesophilic bacteria | 0 KBE/ml | 300 1/ml | — | Mean · WUL: Mittlere Druckzone Aarwangen-Langenthal |
| Escherichia coli (E. coli) | 0 KBE/100ml | 0/100 ml | — | Maximum · Median 0 · WUL: Mittlere Druckzone Aarwangen-Langenthal |
| Intestinal enterococci | 0 KBE/100ml | 0/100 ml | — | Maximum · Median 0 · WUL: Mittlere Druckzone Aarwangen-Langenthal |
Chemical parameters (1)
| Parameter | Value | Parametric value | Share of the parametric value | Reference |
|---|---|---|---|---|
| Nitrate | 22.8 mg/l | 40 mg/l | 57 % | Mean · WUL: Mittlere Druckzone Aarwangen-Langenthal |
Indicator parameters (5)
| Parameter | Value | Parametric value | Share of the parametric value | Reference |
|---|---|---|---|---|
| Chloride | 10.2 mg/l | — | — | Mean · WUL: Mittlere Druckzone Aarwangen-Langenthal |
| Sodium | 7.4 mg/l | 200 mg/l | 4 % | Mean · WUL: Mittlere Druckzone Aarwangen-Langenthal |
| Sulphate | 9.2 mg/l | — | — | Mean · WUL: Mittlere Druckzone Aarwangen-Langenthal |
| Temperature | 12.5 °C | — | — | Mean · WUL: Mittlere Druckzone Aarwangen-Langenthal |
| Turbidity | 0.01 TE/F | — | — | Mean · WUL: Mittlere Druckzone Aarwangen-Langenthal |
Further parameters (3)
| Parameter | Value | Parametric value | Share of the parametric value | Reference |
|---|---|---|---|---|
| Calcium | 109.9 mg/l | — | — | Mean · WUL: Mittlere Druckzone Aarwangen-Langenthal |
| Magnesium | 15.9 mg/l | — | — | Mean · WUL: Mittlere Druckzone Aarwangen-Langenthal |
| Total hardness | 30.9 °fH | — | — | Mean · WUL: Mittlere Druckzone Aarwangen-Langenthal |
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/732/gemeindeverband-wasserversorgung-untere-langete-wul/3331/wul-mittlere-druckzone-aarwangen-langenthal · 2025 · 2025 · retrieved on 07/08/2026
Postcodes in this zone: 4923
Show 3 more supply zones
WUL: Mittlere Druckzone Roggwil-Wynau
Gemeindeverband Wasserversorgung untere Langete WULAssigned via the water supplier — the exact supply zone boundary within the postcode is not yet linked.
Water hardness
18.2 °dH
Hardness range hard
| Parameter | Value | Parametric value | Share of the parametric value | Reference |
|---|---|---|---|---|
| Nitrate | 21.8 mg/l | 40 mg/l | 55 % | Mean · WUL: Mittlere Druckzone Roggwil-Wynau |
| Escherichia coli (E. coli) | 0 KBE/100ml | 0/100 ml | — | Maximum · Median 0 · WUL: Mittlere Druckzone Roggwil-Wynau |
| Sulphate | 11.4 mg/l | — | — | Mean · WUL: Mittlere Druckzone Roggwil-Wynau |
| Sodium | 6.6 mg/l | 200 mg/l | 3 % | Mean · WUL: Mittlere Druckzone Roggwil-Wynau |
Show all recorded parameters (12 — most recent value per parameter)
Microbiology (3)
| Parameter | Value | Parametric value | Share of the parametric value | Reference |
|---|---|---|---|---|
| Aerobic mesophilic bacteria | 0 KBE/ml | 300 1/ml | — | Mean · WUL: Mittlere Druckzone Roggwil-Wynau |
| Escherichia coli (E. coli) | 0 KBE/100ml | 0/100 ml | — | Maximum · Median 0 · WUL: Mittlere Druckzone Roggwil-Wynau |
| Intestinal enterococci | 0 KBE/100ml | 0/100 ml | — | Maximum · Median 0 · WUL: Mittlere Druckzone Roggwil-Wynau |
Chemical parameters (1)
| Parameter | Value | Parametric value | Share of the parametric value | Reference |
|---|---|---|---|---|
| Nitrate | 21.8 mg/l | 40 mg/l | 55 % | Mean · WUL: Mittlere Druckzone Roggwil-Wynau |
Indicator parameters (5)
| Parameter | Value | Parametric value | Share of the parametric value | Reference |
|---|---|---|---|---|
| Chloride | 9.7 mg/l | — | — | Mean · WUL: Mittlere Druckzone Roggwil-Wynau |
| Sodium | 6.6 mg/l | 200 mg/l | 3 % | Mean · WUL: Mittlere Druckzone Roggwil-Wynau |
| Sulphate | 11.4 mg/l | — | — | Mean · WUL: Mittlere Druckzone Roggwil-Wynau |
| Temperature | 12.8 °C | — | — | Mean · WUL: Mittlere Druckzone Roggwil-Wynau |
| Turbidity | 0.01 TE/F | — | — | Mean · WUL: Mittlere Druckzone Roggwil-Wynau |
Further parameters (3)
| Parameter | Value | Parametric value | Share of the parametric value | Reference |
|---|---|---|---|---|
| Calcium | 114.2 mg/l | — | — | Mean · WUL: Mittlere Druckzone Roggwil-Wynau |
| Magnesium | 13.3 mg/l | — | — | Mean · WUL: Mittlere Druckzone Roggwil-Wynau |
| Total hardness | 32.5 °fH | — | — | Mean · WUL: Mittlere Druckzone Roggwil-Wynau |
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/732/gemeindeverband-wasserversorgung-untere-langete-wul/3332/wul-mittlere-druckzone-roggwil-wynau · 2025 · 2025 · retrieved on 07/08/2026
Postcodes in this zone: 4923
WUL: Obere Druckzone
Gemeindeverband Wasserversorgung untere Langete WULAssigned via the water supplier — the exact supply zone boundary within the postcode is not yet linked.
Water hardness
17.7 °dH
Hardness range hard
| Parameter | Value | Parametric value | Share of the parametric value | Reference |
|---|---|---|---|---|
| Nitrate | 22.5 mg/l | 40 mg/l | 56 % | Mean · WUL: Obere Druckzone |
| Escherichia coli (E. coli) | 0 KBE/100ml | 0/100 ml | — | Maximum · Median 0 · WUL: Obere Druckzone |
| Sulphate | 9.2 mg/l | — | — | Mean · WUL: Obere Druckzone |
| Sodium | 7.5 mg/l | 200 mg/l | 4 % | Mean · WUL: Obere Druckzone |
Show all recorded parameters (12 — most recent value per parameter)
Microbiology (3)
| Parameter | Value | Parametric value | Share of the parametric value | Reference |
|---|---|---|---|---|
| Aerobic mesophilic bacteria | 0 KBE/ml | 300 1/ml | — | Mean · WUL: Obere Druckzone |
| Escherichia coli (E. coli) | 0 KBE/100ml | 0/100 ml | — | Maximum · Median 0 · WUL: Obere Druckzone |
| Intestinal enterococci | 0 KBE/100ml | 0/100 ml | — | Maximum · Median 0 · WUL: Obere Druckzone |
Chemical parameters (1)
| Parameter | Value | Parametric value | Share of the parametric value | Reference |
|---|---|---|---|---|
| Nitrate | 22.5 mg/l | 40 mg/l | 56 % | Mean · WUL: Obere Druckzone |
Indicator parameters (5)
| Parameter | Value | Parametric value | Share of the parametric value | Reference |
|---|---|---|---|---|
| Chloride | 10.2 mg/l | — | — | Mean · WUL: Obere Druckzone |
| Sodium | 7.5 mg/l | 200 mg/l | 4 % | Mean · WUL: Obere Druckzone |
| Sulphate | 9.2 mg/l | — | — | Mean · WUL: Obere Druckzone |
| Temperature | 12.4 °C | — | — | Mean · WUL: Obere Druckzone |
| Turbidity | 0.01 TE/F | — | — | Mean · WUL: Obere Druckzone |
Further parameters (3)
| Parameter | Value | Parametric value | Share of the parametric value | Reference |
|---|---|---|---|---|
| Calcium | 110.3 mg/l | — | — | Mean · WUL: Obere Druckzone |
| Magnesium | 16 mg/l | — | — | Mean · WUL: Obere Druckzone |
| Total hardness | 31.6 °fH | — | — | Mean · WUL: Obere Druckzone |
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/732/gemeindeverband-wasserversorgung-untere-langete-wul/3330/wul-obere-druckzone · 2025 · 2025 · retrieved on 07/08/2026
Postcodes in this zone: 4923
WUL: Untere Druckzone
Gemeindeverband Wasserversorgung untere Langete WULAssigned via the water supplier — the exact supply zone boundary within the postcode is not yet linked.
Water hardness
18.1 °dH
Hardness range hard
| Parameter | Value | Parametric value | Share of the parametric value | Reference |
|---|---|---|---|---|
| Nitrate | 21 mg/l | 40 mg/l | 53 % | Mean · WUL: Untere Druckzone |
| Escherichia coli (E. coli) | 0 KBE/100ml | 0/100 ml | — | Maximum · Median 0 · WUL: Untere Druckzone |
| Sulphate | 11.2 mg/l | — | — | Mean · WUL: Untere Druckzone |
| Sodium | 7.1 mg/l | 200 mg/l | 4 % | Mean · WUL: Untere Druckzone |
Show all recorded parameters (12 — most recent value per parameter)
Microbiology (3)
| Parameter | Value | Parametric value | Share of the parametric value | Reference |
|---|---|---|---|---|
| Aerobic mesophilic bacteria | 0 KBE/ml | 300 1/ml | — | Mean · WUL: Untere Druckzone |
| Escherichia coli (E. coli) | 0 KBE/100ml | 0/100 ml | — | Maximum · Median 0 · WUL: Untere Druckzone |
| Intestinal enterococci | 0 KBE/100ml | 0/100 ml | — | Maximum · Median 0 · WUL: Untere Druckzone |
Chemical parameters (1)
| Parameter | Value | Parametric value | Share of the parametric value | Reference |
|---|---|---|---|---|
| Nitrate | 21 mg/l | 40 mg/l | 53 % | Mean · WUL: Untere Druckzone |
Indicator parameters (5)
| Parameter | Value | Parametric value | Share of the parametric value | Reference |
|---|---|---|---|---|
| Chloride | 10.2 mg/l | — | — | Mean · WUL: Untere Druckzone |
| Sodium | 7.1 mg/l | 200 mg/l | 4 % | Mean · WUL: Untere Druckzone |
| Sulphate | 11.2 mg/l | — | — | Mean · WUL: Untere Druckzone |
| Temperature | 13 °C | — | — | Mean · WUL: Untere Druckzone |
| Turbidity | 0.01 TE/F | — | — | Mean · WUL: Untere Druckzone |
Further parameters (3)
| Parameter | Value | Parametric value | Share of the parametric value | Reference |
|---|---|---|---|---|
| Calcium | 112.9 mg/l | — | — | Mean · WUL: Untere Druckzone |
| Magnesium | 13.7 mg/l | — | — | Mean · WUL: Untere Druckzone |
| Total hardness | 32.3 °fH | — | — | Mean · WUL: Untere Druckzone |
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/732/gemeindeverband-wasserversorgung-untere-langete-wul/3333/wul-untere-druckzone · 2025 · 2025 · retrieved on 07/08/2026
Postcodes in this zone: 4923
Frequently asked questions about drinking water in Wynau
- How hard is the water in Wynau?
- Gemeindeverband Wasserversorgung untere Langete WUL publishes a total hardness of 30.9 °fH for the supply zone WUL: Mittlere Druckzone Aarwangen-Langenthal — that corresponds to 17.3 °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 Wynau?
- Gemeindeverband Wasserversorgung untere Langete WUL publishes a nitrate value of 22.8 mg/l for the supply zone WUL: Mittlere Druckzone Aarwangen-Langenthal. The statutory parametric value is 40 mg/l; the measured value represents 57 % of the parametric value. Basis: 2025, retrieved on 07/08/2026.
- Who supplies the drinking water in Wynau?
- Gemeindeverband Wasserversorgung untere Langete WUL. The values shown here come from the supply zone WUL: Mittlere Druckzone Aarwangen-Langenthal 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.