Drinking water in Roggwil TG
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
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.
Freidorf-Watt
Wasserkorporation Freidorf WattAssigned via the water supplier — the exact supply zone boundary within the postcode is not yet linked.
These values are more than a year old. The most recent analysis the water supplier has published for this zone dates from 31/12/2023. We have no newer values — which is why we show the latest available ones rather than none at all. They say nothing about how the water has changed since then.
| Parameter | Value | Parametric value | Share of the parametric value | Reference |
|---|---|---|---|---|
| Nitrate | 13 mg/l | 40 mg/l | 33 % | Mean · Freidorf-Watt |
| Escherichia coli (E. coli) | nn not detectable Unit not stated in the document | 0/100 ml | — | Maximum · Median nn · Freidorf-Watt |
Show all recorded parameters (10 — most recent value per parameter)
Microbiology (3)
| Parameter | Value | Parametric value | Share of the parametric value | Reference |
|---|---|---|---|---|
| Aerobic mesophilic bacteria | 100 KBE/ml | 300 1/ml | — | Mean · Freidorf-Watt |
| Escherichia coli (E. coli) | nn not detectable Unit not stated in the document | 0/100 ml | — | Maximum · Median nn · Freidorf-Watt |
| Intestinal enterococci | nn not detectable Unit not stated in the document | 0/100 ml | — | Maximum · Median nn · Freidorf-Watt |
Chemical parameters (1)
| Parameter | Value | Parametric value | Share of the parametric value | Reference |
|---|---|---|---|---|
| Nitrate | 13 mg/l | 40 mg/l | 33 % | Mean · Freidorf-Watt |
Indicator parameters (3)
| Parameter | Value | Parametric value | Share of the parametric value | Reference |
|---|---|---|---|---|
| Conductivity (25 °C) | 710 µS/cm | — | — | Mean · Freidorf-Watt |
| Temperature | 15 °C | — | — | Mean · Freidorf-Watt |
| Turbidity | 0.3 TE/F | — | — | Mean · Freidorf-Watt |
Further parameters (3)
| Parameter | Value | Parametric value | Share of the parametric value | Reference |
|---|---|---|---|---|
| Calcium | 120 mg/l | — | — | Mean · Freidorf-Watt |
| Magnesium | 23 mg/l | — | — | Mean · Freidorf-Watt |
| Total hardness | 31 °fH | — | — | Mean · Freidorf-Watt |
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: 9325
Show 3 more supply zones
Neukirch- Egnach- Winden
Wasserversorgung EgnachAssigned 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 | 7.1 mg/l | 40 mg/l | 18 % | Mean · Neukirch- Egnach- Winden |
| Escherichia coli (E. coli) | nn not detectable Unit not stated in the document | 0/100 ml | — | Maximum · Median nn · Neukirch- Egnach- Winden |
| Sulphate | 39 mg/l | — | — | Mean · Neukirch- Egnach- Winden |
Show all recorded parameters (11 — most recent value per parameter)
Microbiology (3)
| Parameter | Value | Parametric value | Share of the parametric value | Reference |
|---|---|---|---|---|
| Aerobic mesophilic bacteria | 40 KBE/ml | 300 1/ml | — | Mean · Neukirch- Egnach- Winden |
| Escherichia coli (E. coli) | nn not detectable Unit not stated in the document | 0/100 ml | — | Maximum · Median nn · Neukirch- Egnach- Winden |
| Intestinal enterococci | nn not detectable Unit not stated in the document | 0/100 ml | — | Maximum · Median nn · Neukirch- Egnach- Winden |
Chemical parameters (1)
| Parameter | Value | Parametric value | Share of the parametric value | Reference |
|---|---|---|---|---|
| Nitrate | 7.1 mg/l | 40 mg/l | 18 % | Mean · Neukirch- Egnach- Winden |
Indicator parameters (4)
| Parameter | Value | Parametric value | Share of the parametric value | Reference |
|---|---|---|---|---|
| Conductivity (25 °C) | 459 µS/cm | — | — | Mean · Neukirch- Egnach- Winden |
| Iron | 0.01 mg/l | 0.2 mg/l | 5 % | Mean · Neukirch- Egnach- Winden |
| Sulphate | 39 mg/l | — | — | Mean · Neukirch- Egnach- Winden |
| Temperature | 12.8 °C | — | — | Mean · Neukirch- Egnach- Winden |
Further parameters (3)
| Parameter | Value | Parametric value | Share of the parametric value | Reference |
|---|---|---|---|---|
| Calcium | 67.6 mg/l | — | — | Mean · Neukirch- Egnach- Winden |
| Magnesium | 10.3 mg/l | — | — | Mean · Neukirch- Egnach- Winden |
| Total hardness | 21.1 °fH | — | — | Mean · Neukirch- Egnach- Winden |
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: 9325
Niederzone West
Wasserversorgung EgnachAssigned 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 | 3.97 mg/l | 40 mg/l | 10 % | Mean · Niederzone West |
| Escherichia coli (E. coli) | nn not detectable Unit not stated in the document | 0/100 ml | — | Maximum · Median nn · Niederzone West |
| Sulphate | 33.7 mg/l | — | — | Mean · Niederzone West |
| Sodium | 5.63 mg/l | 200 mg/l | 3 % | Mean · Niederzone West |
Show all recorded parameters (13 — most recent value per parameter)
Microbiology (3)
| Parameter | Value | Parametric value | Share of the parametric value | Reference |
|---|---|---|---|---|
| Aerobic mesophilic bacteria | 78 KBE/ml | 300 1/ml | — | Mean · Niederzone West |
| Escherichia coli (E. coli) | nn not detectable Unit not stated in the document | 0/100 ml | — | Maximum · Median nn · Niederzone West |
| Intestinal enterococci | nn not detectable Unit not stated in the document | 0/100 ml | — | Maximum · Median nn · Niederzone West |
Chemical parameters (1)
| Parameter | Value | Parametric value | Share of the parametric value | Reference |
|---|---|---|---|---|
| Nitrate | 3.97 mg/l | 40 mg/l | 10 % | Mean · Niederzone West |
Indicator parameters (5)
| Parameter | Value | Parametric value | Share of the parametric value | Reference |
|---|---|---|---|---|
| Chloride | 7.55 mg/l | — | — | Mean · Niederzone West |
| Conductivity (25 °C) | 329 µS/cm | — | — | Mean · Niederzone West |
| Sodium | 5.63 mg/l | 200 mg/l | 3 % | Mean · Niederzone West |
| Sulphate | 33.7 mg/l | — | — | Mean · Niederzone West |
| Temperature | 14.6 °C | — | — | Mean · Niederzone West |
Further parameters (4)
| Parameter | Value | Parametric value | Share of the parametric value | Reference |
|---|---|---|---|---|
| Calcium | 50.5 mg/l | — | — | Mean · Niederzone West |
| Magnesium | 8.52 mg/l | — | — | Mean · Niederzone West |
| Potassium | 1.4 mg/l | — | — | Mean · Niederzone West |
| Total hardness | 16.1 °fH | — | — | Mean · Niederzone West |
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: 9325
Quellwasser Mammertshofen
Wasserkorporation Freidorf WattAssigned via the water supplier — the exact supply zone boundary within the postcode is not yet linked.
These values are more than a year old. The most recent analysis the water supplier has published for this zone dates from 31/12/2023. We have no newer values — which is why we show the latest available ones rather than none at all. They say nothing about how the water has changed since then.
| Parameter | Value | Parametric value | Share of the parametric value | Reference |
|---|---|---|---|---|
| Nitrate | 13 mg/l | 40 mg/l | 33 % | Mean · Quellwasser Mammertshofen |
| Escherichia coli (E. coli) | nn not detectable Unit not stated in the document | 0/100 ml | — | Maximum · Median nn · Quellwasser Mammertshofen |
Show all recorded parameters (10 — most recent value per parameter)
Microbiology (3)
| Parameter | Value | Parametric value | Share of the parametric value | Reference |
|---|---|---|---|---|
| Aerobic mesophilic bacteria | 0.5 KBE/ml | 300 1/ml | — | Mean · Quellwasser Mammertshofen |
| Escherichia coli (E. coli) | nn not detectable Unit not stated in the document | 0/100 ml | — | Maximum · Median nn · Quellwasser Mammertshofen |
| Intestinal enterococci | nn not detectable Unit not stated in the document | 0/100 ml | — | Maximum · Median nn · Quellwasser Mammertshofen |
Chemical parameters (1)
| Parameter | Value | Parametric value | Share of the parametric value | Reference |
|---|---|---|---|---|
| Nitrate | 13 mg/l | 40 mg/l | 33 % | Mean · Quellwasser Mammertshofen |
Indicator parameters (3)
| Parameter | Value | Parametric value | Share of the parametric value | Reference |
|---|---|---|---|---|
| Conductivity (25 °C) | 710 µS/cm | — | — | Mean · Quellwasser Mammertshofen |
| Temperature | 13 °C | — | — | Mean · Quellwasser Mammertshofen |
| Turbidity | < 0.1 TE/F below limit of quantification | — | — | Mean · Quellwasser Mammertshofen |
Further parameters (3)
| Parameter | Value | Parametric value | Share of the parametric value | Reference |
|---|---|---|---|---|
| Calcium | 120 mg/l | — | — | Mean · Quellwasser Mammertshofen |
| Magnesium | 23 mg/l | — | — | Mean · Quellwasser Mammertshofen |
| Total hardness | 36 °fH | — | — | Mean · Quellwasser Mammertshofen |
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: 9325
Frequently asked questions about drinking water in Roggwil TG
- How hard is the water in Roggwil TG?
- Wasserkorporation Freidorf Watt publishes a total hardness of 31 °fH for the supply zone Freidorf-Watt — that corresponds to 17.4 °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: 2023, retrieved on 07/08/2026.
- How much nitrate is in the drinking water in Roggwil TG?
- Wasserkorporation Freidorf Watt publishes a nitrate value of 13 mg/l for the supply zone Freidorf-Watt. The statutory parametric value is 40 mg/l; the measured value represents 33 % of the parametric value. Basis: 2023, retrieved on 07/08/2026.
- Who supplies the drinking water in Roggwil TG?
- Wasserkorporation Freidorf Watt. The values shown here come from the supply zone Freidorf-Watt 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.