Drinking water in Zofingen
3 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.
Hochzone Mühlethal
StWZ Wasser AGAssigned 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 | 12 mg/l | 40 mg/l | 30 % | Mean · Hochzone Mühlethal |
| Escherichia coli (E. coli) | 0 KBE/100ml | 0/100 ml | — | Maximum · Median 0 · Hochzone Mühlethal |
Show all recorded parameters (9 — 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 · Hochzone Mühlethal |
| Escherichia coli (E. coli) | 0 KBE/100ml | 0/100 ml | — | Maximum · Median 0 · Hochzone Mühlethal |
| Intestinal enterococci | 0 KBE/100ml | 0/100 ml | — | Maximum · Median 0 · Hochzone Mühlethal |
Chemical parameters (1)
| Parameter | Value | Parametric value | Share of the parametric value | Reference |
|---|---|---|---|---|
| Nitrate | 12 mg/l | 40 mg/l | 30 % | Mean · Hochzone Mühlethal |
Metabolites (2)
| Parameter | Value | Parametric value | Share of the parametric value | Reference |
|---|---|---|---|---|
| Chlorothalonil metabolite R417888 | < 0.02 µg/l below limit of quantification | 0.1 µg/l | < 20 % * | Mean · Hochzone Mühlethal |
| Chlorothalonil metabolite R471811 | 0.054 µg/l | 0.1 µg/l | 54 % | Mean · Hochzone Mühlethal |
* 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.
Further parameters (3)
| Parameter | Value | Parametric value | Share of the parametric value | Reference |
|---|---|---|---|---|
| Calcium | 66 mg/l | — | — | Mean · Hochzone Mühlethal |
| Magnesium | 9.4 mg/l | — | — | Mean · Hochzone Mühlethal |
| Total hardness | 20.2 °fH | — | — | Mean · Hochzone Mühlethal |
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: 4800
Show 2 more supply zones
Hochzone Zofingen
StWZ Wasser AGAssigned 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 | 17 mg/l | 40 mg/l | 43 % | Mean · Hochzone Zofingen |
| Escherichia coli (E. coli) | 0 KBE/100ml | 0/100 ml | — | Maximum · Median 0 · Hochzone Zofingen |
Show all recorded parameters (9 — 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 · Hochzone Zofingen |
| Escherichia coli (E. coli) | 0 KBE/100ml | 0/100 ml | — | Maximum · Median 0 · Hochzone Zofingen |
| Intestinal enterococci | 0 KBE/100ml | 0/100 ml | — | Maximum · Median 0 · Hochzone Zofingen |
Chemical parameters (1)
| Parameter | Value | Parametric value | Share of the parametric value | Reference |
|---|---|---|---|---|
| Nitrate | 17 mg/l | 40 mg/l | 43 % | Mean · Hochzone Zofingen |
Metabolites (2)
| Parameter | Value | Parametric value | Share of the parametric value | Reference |
|---|---|---|---|---|
| Chlorothalonil metabolite R417888 | < 0.02 µg/l below limit of quantification | 0.1 µg/l | < 20 % * | Mean · Hochzone Zofingen |
| Chlorothalonil metabolite R471811 | < 0.02 µg/l below limit of quantification | 0.1 µg/l | < 20 % * | Mean · Hochzone Zofingen |
* 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.
Further parameters (3)
| Parameter | Value | Parametric value | Share of the parametric value | Reference |
|---|---|---|---|---|
| Calcium | 78 mg/l | — | — | Mean · Hochzone Zofingen |
| Magnesium | 18.5 mg/l | — | — | Mean · Hochzone Zofingen |
| Total hardness | 27.1 °fH | — | — | Mean · Hochzone Zofingen |
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: 4800
Niederzone Zofingen
StWZ Wasser AGAssigned 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 | 20 mg/l | 40 mg/l | 50 % | Mean · Niederzone Zofingen |
| Escherichia coli (E. coli) | 0 KBE/100ml | 0/100 ml | — | Maximum · Median 0 · Niederzone Zofingen |
Show all recorded parameters (9 — 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 · Niederzone Zofingen |
| Escherichia coli (E. coli) | 0 KBE/100ml | 0/100 ml | — | Maximum · Median 0 · Niederzone Zofingen |
| Intestinal enterococci | 0 KBE/100ml | 0/100 ml | — | Maximum · Median 0 · Niederzone Zofingen |
Chemical parameters (1)
| Parameter | Value | Parametric value | Share of the parametric value | Reference |
|---|---|---|---|---|
| Nitrate | 20 mg/l | 40 mg/l | 50 % | Mean · Niederzone Zofingen |
Metabolites (2)
| Parameter | Value | Parametric value | Share of the parametric value | Reference |
|---|---|---|---|---|
| Chlorothalonil metabolite R417888 | < 0.02 µg/l below limit of quantification | 0.1 µg/l | < 20 % * | Mean · Niederzone Zofingen |
| Chlorothalonil metabolite R471811 | 0.093 µg/l | 0.1 µg/l | 93 % | Mean · Niederzone Zofingen |
* 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.
Further parameters (3)
| Parameter | Value | Parametric value | Share of the parametric value | Reference |
|---|---|---|---|---|
| Calcium | 110 mg/l | — | — | Mean · Niederzone Zofingen |
| Magnesium | 12.8 mg/l | — | — | Mean · Niederzone Zofingen |
| Total hardness | 32.8 °fH | — | — | Mean · Niederzone Zofingen |
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: 4800
Frequently asked questions about drinking water in Zofingen
- How hard is the water in Zofingen?
- StWZ Wasser AG publishes a total hardness of 20.2 °fH for the supply zone Hochzone Mühlethal — that corresponds to 11.3 °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: 2026, retrieved on 07/08/2026.
- How much nitrate is in the drinking water in Zofingen?
- StWZ Wasser AG publishes a nitrate value of 12 mg/l for the supply zone Hochzone Mühlethal. The statutory parametric value is 40 mg/l; the measured value represents 30 % of the parametric value. Basis: 2026, retrieved on 07/08/2026.
- Who supplies the drinking water in Zofingen?
- StWZ Wasser AG. The values shown here come from the supply zone Hochzone Mühlethal 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.