Drinking water in Riesa
One supply zone, water supplier: Wasserversorgung Riesa/Großenhain GmbH (WRG).
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.
Assigned 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 | 0,0000098 mg/L | 0.1 µg/l | 10 % | Single value · Riesa |
| Nitrate | 7,85 mg/L | 50 mg/l | 16 % | Single value · Riesa |
| Lead | <0,01 mg/L below limit of quantification | 10 µg/l | < 100 % * | Single value · Riesa |
| Escherichia coli (E. coli) | 0 1/100 ml | 0/100 ml | — | Single value · Riesa |
| Sulphate | 100 mg/L | 250 mg/l | 40 % | Single value · Riesa |
| Sodium | 23,2 mg/L | 200 mg/l | 12 % | Single value · Riesa |
* 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 (35 — most recent value per parameter)
Microbiology (2)
| Parameter | Value | Parametric value | Share of the parametric value | Reference |
|---|---|---|---|---|
| Escherichia coli (E. coli) | 0 1/100 ml | 0/100 ml | — | Single value · Riesa |
| Intestinal enterococci | 0 1/100 ml | 0/100 ml | — | Single value · Riesa |
Chemical parameters (14)
| Parameter | Value | Parametric value | Share of the parametric value | Reference |
|---|---|---|---|---|
| Arsenic | <0,01 mg/L below limit of quantification | 10 µg/l | < 100 % * | Single value · Riesa |
| Benzene | <0,001 mg/L below limit of quantification | 1 µg/l | < 100 % * | Single value · Riesa |
| Cadmium | <0,001 mg/L below limit of quantification | 3 µg/l | < 33 % * | Single value · Riesa |
| Chromium | 0,0005 mg/L | 25 µg/l | 2 % | Single value · Riesa |
| Cyanide | <0,005 mg/L below limit of quantification | 50 µg/l | < 10 % * | Single value · Riesa |
| Fluoride | 0,13 mg/L | 1.5 mg/l | 9 % | Single value · Riesa |
| Lead | <0,01 mg/L below limit of quantification | 10 µg/l | < 100 % * | Single value · Riesa |
| Mercury | <0,0001 mg/L below limit of quantification | 1 µg/l | < 10 % * | Single value · Riesa |
| Nickel | <0,01 mg/L below limit of quantification | 20 µg/l | < 50 % * | Single value · Riesa |
| Nitrate | 7,85 mg/L | 50 mg/l | 16 % | Single value · Riesa |
| Nitrite | <0,01 mg/L below limit of quantification | 0.5 mg/l | < 2 % * | Single value · Riesa |
| Polycyclic aromatic hydrocarbons | <0,000025 µg/L below limit of quantification | 0.1 µg/l | < < 0.1 % * | Single value · Riesa |
| Trihalomethanes — Total | <0,0004 mg/L below limit of quantification | 50 µg/l | < 0.8 % * | Single value · Riesa |
| Uranium | <0,0001 mg/L below limit of quantification | 10 µg/l | < 1 % * | Single value · Riesa |
* 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 | 0,0000098 mg/L | 0.1 µg/l | 10 % | Single value · Riesa |
Indicator parameters (11)
| Parameter | Value | Parametric value | Share of the parametric value | Reference |
|---|---|---|---|---|
| Aluminium | <0,03 mg/L below limit of quantification | 0.2 mg/l | < 15 % * | Single value · Riesa |
| Ammonium | <0,005 mg/L below limit of quantification | 0.5 mg/l | < 1 % * | Single value · Riesa |
| Calcite dissolution capacity | 2 mg/L CaCO(3) | 5 mg/l CaCO3 | — | Single value · Riesa |
| Chloride | 42,0 mg/L | 250 mg/l | 17 % | Single value · Riesa |
| Coliform bacteria | 0 1/100 ml | 0/100 ml | — | Single value · Riesa |
| Conductivity (25 °C) | 549 µS/cm | 2,790 µS/cm | — | Single value · Riesa |
| Iron | 0,008 mg/L | 0.2 mg/l | 4 % | Single value · Riesa |
| Manganese | <0,005 mg/L below limit of quantification | 50 µg/l | < 10 % * | Single value · Riesa |
| Sodium | 23,2 mg/L | 200 mg/l | 12 % | Single value · Riesa |
| Sulphate | 100 mg/L | 250 mg/l | 40 % | Single value · Riesa |
| Total organic carbon (TOC) | 4,00 mg/L | ohne anormale Veränderung | — | Single value · Riesa |
* 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 (7)
| Parameter | Value | Parametric value | Share of the parametric value | Reference |
|---|---|---|---|---|
| Acid capacity to pH 4.3 | 1,75 mmol/L | — | — | Single value · Riesa |
| Base capacity to pH 8.2 | 0,07 mmol/L | — | — | Single value · Riesa |
| Calcium | 1,34 mmol/L | — | — | Single value · Riesa |
| Hydrogen carbonate | 107 mg/L | — | — | Single value · Riesa |
| Magnesium | 0,56 mmol/L | — | — | Single value · Riesa |
| Potassium | 0,21 mmol/L | — | — | Single value · Riesa |
| Total hardness | 10,50 ° dH | — | — | Single value · Riesa |
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: 01587 , 01589 , 01591
Frequently asked questions about drinking water in Riesa
- How hard is the water in Riesa?
- Wasserversorgung Riesa/Großenhain GmbH (WRG) publishes a total hardness of 10.5 °dH for the supply zone Riesa (hardness range medium). 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 11/07/2026.
- How much nitrate is in the drinking water in Riesa?
- Wasserversorgung Riesa/Großenhain GmbH (WRG) publishes a nitrate value of 7,85 mg/L for the supply zone Riesa. The statutory parametric value is 50 mg/l; the measured value represents 16 % of the parametric value. Basis: Publication by the water supplier, retrieved on 11/07/2026.
- Are PFAS detectable in the drinking water in Riesa?
- Wasserversorgung Riesa/Großenhain GmbH (WRG) publishes for the supply zone Riesa a sum value PFAS-20 of 0,0000098 mg/L (0.01 µg/l). The statutory parametric value is 0.1 µg/l; the measured value represents 10 % 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 11/07/2026.
- Who supplies the drinking water in Riesa?
- Wasserversorgung Riesa/Großenhain GmbH (WRG). The values shown here come from the supply zone Riesa 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.