Drinking water in Mendig
One supply zone, water supplier: TWIST RLP - AB Erlental (WW), TW.
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.
AB Erlental (WW), TW
TWIST RLP - AB Erlental (WW), TWAssigned via the water supplier — the exact supply zone boundary within the postcode is not yet linked.
No date is given for these values. The water supplier publishes the analysis without a sampling date and without a report date. When the water was examined is not apparent from the source — we do not add a date and we do not estimate one. What is stated is therefore only when we retrieved the document.
| Parameter | Value | Parametric value | Share of the parametric value | Reference |
|---|---|---|---|---|
| Sum of PFAS | 0 µg/L | 0.1 µg/l | 0 % | Mean · AB Erlental (WW), TW |
| Nitrate | 29 mg/L | 50 mg/l | 58 % | Mean · AB Erlental (WW), TW |
| Lead | < 1 µg/L below limit of quantification | 10 µg/l | < 10 % * | Mean · AB Erlental (WW), TW |
| Escherichia coli (E. coli) | 0 Anzahl/100ml | 0/100 ml | — | Mean · AB Erlental (WW), TW |
| Sulphate | 16 mg/L | 250 mg/l | 6 % | Mean · AB Erlental (WW), TW |
| Sodium | 44 mg/L | 200 mg/l | 22 % | Mean · AB Erlental (WW), TW |
* 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.
Show all recorded parameters (30 — most recent value per parameter)
Microbiology (1)
| Parameter | Value | Parametric value | Share of the parametric value | Reference |
|---|---|---|---|---|
| Escherichia coli (E. coli) | 0 Anzahl/100ml | 0/100 ml | — | Mean · AB Erlental (WW), TW |
Chemical parameters (14)
| Parameter | Value | Parametric value | Share of the parametric value | Reference |
|---|---|---|---|---|
| Antimony | < 0.5 µg/L below limit of quantification | 5 µg/l | < 10 % * | Mean · AB Erlental (WW), TW |
| Arsenic | 1.4 µg/L | 10 µg/l | 14 % | Mean · AB Erlental (WW), TW |
| Boron | < 0.1 mg/L below limit of quantification | 1 mg/l | < 10 % * | Mean · AB Erlental (WW), TW |
| Cadmium | < 0.3 µg/L below limit of quantification | 3 µg/l | < 10 % * | Mean · AB Erlental (WW), TW |
| Copper | < 0.05 mg/L below limit of quantification | 2 mg/l | < 3 % * | Mean · AB Erlental (WW), TW |
| Cyanide | < 0.005 mg/L below limit of quantification | 50 µg/l | < 10 % * | Mean · AB Erlental (WW), TW |
| Fluoride | 0.66 mg/L | 1.5 mg/l | 44 % | Mean · AB Erlental (WW), TW |
| Lead | < 1 µg/L below limit of quantification | 10 µg/l | < 10 % * | Mean · AB Erlental (WW), TW |
| Mercury | < 0.1 µg/L below limit of quantification | 1 µg/l | < 10 % * | Mean · AB Erlental (WW), TW |
| Nickel | < 2 µg/L below limit of quantification | 20 µg/l | < 10 % * | Mean · AB Erlental (WW), TW |
| Nitrate | 29 mg/L | 50 mg/l | 58 % | Mean · AB Erlental (WW), TW |
| Nitrite | < 0.05 mg/L below limit of quantification | 0.5 mg/l | < 10 % * | Mean · AB Erlental (WW), TW |
| Selenium | < 1 µg/L below limit of quantification | 10 µg/l | < 10 % * | Mean · AB Erlental (WW), TW |
| Uranium | 2.6 µg/L | 10 µg/l | 26 % | Mean · AB Erlental (WW), TW |
* 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.
PFAS (1)
| Parameter | Value | Parametric value | Share of the parametric value | Reference |
|---|---|---|---|---|
| Sum of PFAS | 0 µg/L | 0.1 µg/l | 0 % | Mean · AB Erlental (WW), TW |
Indicator parameters (10)
| Parameter | Value | Parametric value | Share of the parametric value | Reference |
|---|---|---|---|---|
| Aluminium | < 0.02 mg/L below limit of quantification | 0.2 mg/l | < 10 % * | Mean · AB Erlental (WW), TW |
| Ammonium | < 0.05 mg/L below limit of quantification | 0.5 mg/l | < 10 % * | Mean · AB Erlental (WW), TW |
| Chloride | 20 mg/L | 250 mg/l | 8 % | Mean · AB Erlental (WW), TW |
| Coliform bacteria | 0 Anzahl/100ml | 0/100 ml | — | Mean · AB Erlental (WW), TW |
| Iron | < 0.02 mg/L below limit of quantification | 0.2 mg/l | < 10 % * | Mean · AB Erlental (WW), TW |
| Manganese | < 0.005 mg/L below limit of quantification | 50 µg/l | < 10 % * | Mean · AB Erlental (WW), TW |
| pH | 7.91 - | 6,5–9,5 | — | Mean · AB Erlental (WW), TW |
| Sodium | 44 mg/L | 200 mg/l | 22 % | Mean · AB Erlental (WW), TW |
| Sulphate | 16 mg/L | 250 mg/l | 6 % | Mean · AB Erlental (WW), TW |
| Temperature | 11.9 °C | — | — | Mean · AB Erlental (WW), TW |
* 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 (4)
| Parameter | Value | Parametric value | Share of the parametric value | Reference |
|---|---|---|---|---|
| Calcium | 44 mg/L | — | — | Mean · AB Erlental (WW), TW |
| Magnesium | 14 mg/L | — | — | Mean · AB Erlental (WW), TW |
| Potassium | 30 mg/L | — | — | Mean · AB Erlental (WW), TW |
| Total hardness | 1.8 mmol/l | — | — | Mean · AB Erlental (WW), TW |
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: 56743
Frequently asked questions about drinking water in Mendig
- How hard is the water in Mendig?
- TWIST RLP - AB Erlental (WW), TW publishes a total hardness of 1.8 mmol/l for the supply zone AB Erlental (WW), TW — that corresponds to 10.1 °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: Publication by the water supplier, retrieved on 13/07/2026.
- How much nitrate is in the drinking water in Mendig?
- TWIST RLP - AB Erlental (WW), TW publishes a nitrate value of 29 mg/L for the supply zone AB Erlental (WW), TW. The statutory parametric value is 50 mg/l; the measured value represents 58 % of the parametric value. Basis: Publication by the water supplier, retrieved on 13/07/2026.
- Are PFAS detectable in the drinking water in Mendig?
- TWIST RLP - AB Erlental (WW), TW publishes for the supply zone AB Erlental (WW), TW a sum value PFAS-20 of 0 µg/L. The statutory parametric value is 0.1 µg/l; the measured value represents 0 % of the parametric value. For the sum of the 20 individual substances, this parametric value has applied since 12/01/2026. Basis: Publication by the water supplier, retrieved on 13/07/2026.
- Who supplies the drinking water in Mendig?
- TWIST RLP - AB Erlental (WW), TW. The values shown here come from the supply zone AB Erlental (WW), TW 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.