Drinking water in 58453
One supply zone, water supplier: VERBUNDWASSERWERK WITTEN GMBH.
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.
| Parameter | Value | Parametric value | Share of the parametric value | Reference |
|---|---|---|---|---|
| Sum of PFAS | 0,000033 mg/l | — | — | Mean |
| Nitrate | 11,1 mg/l | 50 mg/l | 22 % | Mean |
| Lead | <0,0005 mg/l below limit of quantification | 10 µg/l | < 5 % * | Mean |
| Escherichia coli (E. coli) | 0 /100ml | 0/100 ml | — | Maximum · Median 0 |
| Sulphate | 34,3 mg/l | 250 mg/l | 14 % | Mean |
| Sodium | 23,6 mg/l | 200 mg/l | 12 % | Mean |
* 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 (71 — most recent value per parameter)
Microbiology (2)
| Parameter | Value | Parametric value | Share of the parametric value | Reference |
|---|---|---|---|---|
| Escherichia coli (E. coli) | 0 /100ml | 0/100 ml | — | Maximum · Median 0 |
| Intestinal enterococci | 0 /100ml | 0/100 ml | — | Maximum · Median 0 |
Chemical parameters (21)
| Parameter | Value | Parametric value | Share of the parametric value | Reference |
|---|---|---|---|---|
| 1,2-dichloroethane | <0,0001 mg/l below limit of quantification | 3 µg/l | < 3 % * | Mean |
| Antimony | <0,001 mg/l below limit of quantification | 5 µg/l | < 20 % * | Mean |
| Arsenic | <0,001 mg/l below limit of quantification | 10 µg/l | < 10 % * | Mean |
| Benzene | <0,0001 mg/l below limit of quantification | 1 µg/l | < 10 % * | Mean |
| Benzo(a)pyrene | <0,00001 mg/l below limit of quantification | 10 ng/l | < 100 % * | Mean |
| Bisphenol A | <0,00003 mg/l below limit of quantification | 2.5 µg/l | < 1 % * | Mean |
| Boron | 0,04 mg/l | 1 mg/l | 4 % | Mean |
| Bromate | <0,0005 mg/l below limit of quantification | 10 µg/l | < 5 % * | Mean |
| Cadmium | <0,0001 mg/l below limit of quantification | 3 µg/l | < 3 % * | Mean |
| Chromium | <0,001 mg/l below limit of quantification | 25 µg/l | < 4 % * | Mean |
| Copper | 0,008 mg/l | 2 mg/l | 0.4 % | Mean |
| Cyanide | <0,005 mg/l below limit of quantification | 50 µg/l | < 10 % * | Mean |
| Fluoride | 0,09 mg/l | 1.5 mg/l | 6 % | Mean |
| Lead | <0,0005 mg/l below limit of quantification | 10 µg/l | < 5 % * | Mean |
| Mercury | <0,00005 mg/l below limit of quantification | 1 µg/l | < 5 % * | Mean |
| Nickel | 0,001 mg/l | 20 µg/l | 5 % | Mean |
| Nitrate | 11,1 mg/l | 50 mg/l | 22 % | Mean |
| Nitrite | <0,01 mg/l below limit of quantification | 0.5 mg/l | < 2 % * | Mean |
| Selenium | <0,001 mg/l below limit of quantification | 10 µg/l | < 10 % * | Mean |
| Tetrachloroethene and Trichloroethene (sum) | n.b. mg/l not determined | 10 µg/l | — | Mean |
| Uranium | <0,0001 mg/l below limit of quantification | 10 µg/l | < 1 % * | Mean |
* 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 (2)
| Parameter | Value | Parametric value | Share of the parametric value | Reference |
|---|---|---|---|---|
| Sum of 4 PFAS | 0,000003 mg/l | — | — | Mean |
| Sum of PFAS | 0,000033 mg/l | — | — | Mean |
Indicator parameters (16)
| Parameter | Value | Parametric value | Share of the parametric value | Reference |
|---|---|---|---|---|
| Aluminium | 0,010 mg/l | 0.2 mg/l | 5 % | Mean |
| Ammonium | <0,05 mg/l below limit of quantification | 0.5 mg/l | < 10 % * | Mean |
| Calcite dissolution capacity | 2,1 mg/l CaCO3 | 5 mg/l CaCO3 | — | Mean |
| Chloride | 37,7 mg/l | 250 mg/l | 15 % | Mean |
| Clostridium perfringens (including spores) | 0 /100ml | 0/100 ml | — | Maximum · Median 0 |
| Coliform bacteria | 0 /100ml | 0/100 ml | — | Maximum · Median 0 |
| Colony count 22 °C | <1 /ml below limit of quantification | ohne anormale Veränderung | — | Mean |
| Colony count 36 °C | <1 /ml below limit of quantification | ohne anormale Veränderung | — | Mean |
| Colour | <0,1 m-1 below limit of quantification | 0.5 m⁻¹ | — | Mean |
| Conductivity (25 °C) | 393 µS/cm | 2,790 µS/cm | — | Mean |
| Manganese | <0,001 mg/l below limit of quantification | 50 µg/l | < 2 % * | Mean |
| pH | 7,76 | 6,5–9,5 | — | Mean |
| Sodium | 23,6 mg/l | 200 mg/l | 12 % | Mean |
| Sulphate | 34,3 mg/l | 250 mg/l | 14 % | Mean |
| Total organic carbon (TOC) | 1,0 mg/l | ohne anormale Veränderung | — | Mean |
| Turbidity | 0,06 NTU | 1 NTU | — | Mean |
* 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 (30)
| Parameter | Value | Parametric value | Share of the parametric value | Reference |
|---|---|---|---|---|
| Acid capacity to pH 4.3 | 1,80 mmol/l | — | — | Mean |
| Amidotrizoic acid | 0,15 µg/l | — | — | Mean |
| Atenolol | <0,005 µg/l below limit of quantification | — | — | Mean |
| Base capacity to pH 8.2 | 0,056 mmol/l | — | — | Mean |
| Bezafibrate | <0,010 µg/l below limit of quantification | — | — | Mean |
| Calcium | 40,8 | 1,018 mg/l | mmol/l | — | — | Mean |
| Candesartan | 0,058 µg/l | — | — | Mean |
| Carbamazepine | 0,01 µg/l | — | — | Mean |
| Carbonate hardness | 5,0 °dH | — | — | Mean |
| Diclofenac | <0,010 µg/l below limit of quantification | — | — | Mean |
| Hardness range (WRMG) | weich | — | — | Mean |
| Hydrogen carbonate | 110 mg/l | — | — | Mean |
| Iomeprol | <0,05 µg/l below limit of quantification | — | — | Mean |
| Iopamidol | <0,05 µg/l below limit of quantification | — | — | Mean |
| Iopromide | <0,05 µg/l below limit of quantification | — | — | Mean |
| Magnesium | 6,8 | 0,280 mg/l | mmol/l | — | — | Mean |
| Metoprolol | <0,005 µg/l below limit of quantification | — | — | Mean |
| Oxipurinol | 0,12 µg/l | — | — | Mean |
| Oxygen | 9,8 mg/l | — | — | Mean |
| Phosphate | 0,09 mg/l | — | — | Mean |
| Potassium | 3,4 | 0,087 mg/l | mmol/l | — | — | Mean |
| Sotalol | <0,005 µg/l below limit of quantification | — | — | Mean |
| Sulfamethoxazole | 0,01 µg/l | — | — | Mean |
| Total hardness | 6,2 °dH | — | — | Mean |
| Tributyl phosphate | <0,05 µg/l below limit of quantification | — | — | Mean |
| Trimethoprim | <0,005 µg/l below limit of quantification | — | — | Mean |
| Triphenyl phosphate | <0,05 µg/l below limit of quantification | — | — | Mean |
| Valsartan | <0,010 µg/l below limit of quantification | — | — | Mean |
| Valsartanic acid | <0,050 µg/l below limit of quantification | — | — | Mean |
| Zinc | 0,002 mg/l | — | — | Mean |
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.
Frequent questions about postcode 58453
- How hard is the water in Postcode 58453?
- VERBUNDWASSERWERK WITTEN GMBH publishes a total hardness of 6.2 °dH for the supply zone Witten (hardness range weich). 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 Postcode 58453?
- VERBUNDWASSERWERK WITTEN GMBH publishes a nitrate value of 11,1 mg/l for the supply zone Witten. The statutory parametric value is 50 mg/l; the measured value represents 22 % of the parametric value. Basis: Publication by the water supplier, retrieved on 11/07/2026.
- Who supplies the drinking water in Postcode 58453?
- VERBUNDWASSERWERK WITTEN GMBH. The values shown here come from the supply zone Witten 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.