Drinking water in Grafrath
One supply zone, water supplier: Verwaltungsgemeinschaft Grafrath.
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.
Grafrath
Verwaltungsgemeinschaft GrafrathAssigned 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 | 24 mg/l | 50 mg/l | 48 % | Single value |
| Lead | <0,001 mg/l below limit of quantification | 10 µg/l | < 10 % * | Single value |
| Sodium | 18,6 Unit not stated in the document | 200 mg/l | — | Single value |
* 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 (29 — most recent value per parameter)
Chemical parameters (26)
| Parameter | Value | Parametric value | Share of the parametric value | Reference |
|---|---|---|---|---|
| 1,2-dichloroethane | <0,0005 mg/l below limit of quantification | 3 µg/l | < 17 % * | Single value |
| Arsenic | <0,001 mg/l below limit of quantification | 10 µg/l | < 10 % * | Single value |
| Benzo(a)pyrene | <0,000002 mg/l below limit of quantification | 10 ng/l | < 20 % * | Single value |
| Benzo(b)fluoranthene | <0,000002 mg/l below limit of quantification | — | — | Single value |
| Benzo(ghi)perylene | <0,000002 mg/l below limit of quantification | — | — | Single value |
| Benzo(k)fluoranthene | <0,000002 mg/l below limit of quantification | — | — | Single value |
| Bromate | <0,003 mg/l below limit of quantification | 10 µg/l | < 30 % * | Single value |
| Bromodichloromethane | <0,0002 mg/l below limit of quantification | — | — | Single value |
| Cadmium | <0,0003 mg/l below limit of quantification | 3 µg/l | < 10 % * | Single value |
| Chromium | <0,0005 mg/l below limit of quantification | 25 µg/l | < 2 % * | Single value |
| Copper | 0,032 mg/l | 2 mg/l | 2 % | Single value |
| Dibromochloromethane | <0,0002 mg/l below limit of quantification | — | — | Single value |
| Fluoride | 0,086 mg/l | 1.5 mg/l | 6 % | Single value |
| Lead | <0,001 mg/l below limit of quantification | 10 µg/l | < 10 % * | Single value |
| Mercury | <0,0001 mg/l below limit of quantification | 1 µg/l | < 10 % * | Single value |
| Nickel | <0,002 mg/l below limit of quantification | 20 µg/l | < 10 % * | Single value |
| Nitrate | 24 mg/l | 50 mg/l | 48 % | Single value |
| Nitrite | 0,03 mg/l | 0.5 mg/l | 6 % | Single value |
| Selenium | <0,0005 mg/l below limit of quantification | 10 µg/l | < 5 % * | Single value |
| Tetrachloroethene | <0,0001 mg/l below limit of quantification | — | — | Single value |
| Tetrachloroethene and Trichloroethene (sum) | 0 Unit not stated in the document | 10 µg/l | — | Single value |
| Tribromomethane (bromoform) | <0,0003 mg/l below limit of quantification | — | — | Single value |
| Trichloroethene | <0,0001 mg/l below limit of quantification | — | — | Single value |
| Trichloromethane (chloroform) | <0,0001 mg/l below limit of quantification | — | — | Single value |
| Trihalomethanes — Total | 0 Unit not stated in the document | 50 µg/l | — | Single value |
| Uranium | 0,0016 Unit not stated in the document | 10 µg/l | — | Single value |
* 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.
Indicator parameters (2)
| Parameter | Value | Parametric value | Share of the parametric value | Reference |
|---|---|---|---|---|
| Iron | <0,005 below limit of quantification Unit not stated in the document | 0.2 mg/l | — | Single value |
| Sodium | 18,6 Unit not stated in the document | 200 mg/l | — | Single value |
Further parameters (1)
| Parameter | Value | Parametric value | Share of the parametric value | Reference |
|---|---|---|---|---|
| Magnesium | 30,6 | — | — | Single value |
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: 82284
Frequently asked questions about drinking water in Grafrath
- How much nitrate is in the drinking water in Grafrath?
- Verwaltungsgemeinschaft Grafrath publishes a nitrate value of 24 mg/l for the supply zone Grafrath. The statutory parametric value is 50 mg/l; the measured value represents 48 % of the parametric value. Basis: Publication by the water supplier, retrieved on 13/07/2026.
- Who supplies the drinking water in Grafrath?
- Verwaltungsgemeinschaft Grafrath. The values shown here come from the supply zone Grafrath 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.