Drinking water in Hamminkeln
One supply zone, water supplier: Wasserwerke Wittenhorst (Eigenbetrieb des Wasserversorgungsverbandes Wittenhorst).
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.
These values are more than a year old. The most recent analysis the water supplier has published for this zone dates from 31/12/2024. 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 | 10,2 mg/l | 50 mg/l | 20 % | Mean |
| Sulphate | 97,1 mg/l | 250 mg/l | 39 % | Mean |
| Sodium | 21,8 mg/l | 200 mg/l | 11 % | Mean |
Show all recorded parameters (24 — most recent value per parameter)
Chemical parameters (4)
| Parameter | Value | Parametric value | Share of the parametric value | Reference |
|---|---|---|---|---|
| Cyanide | <0,0050 mg/l below limit of quantification | 50 µg/l | < 10 % * | Mean |
| Fluoride | <0,10 mg/l below limit of quantification | 1.5 mg/l | < 7 % * | Mean |
| Nitrate | 10,2 mg/l | 50 mg/l | 20 % | Mean |
| Nitrite | <0,020 mg/l below limit of quantification | 0.5 mg/l | < 4 % * | 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.
Indicator parameters (11)
| Parameter | Value | Parametric value | Share of the parametric value | Reference |
|---|---|---|---|---|
| Calcite dissolution capacity | -4,4 mg/l | 5 mg/l CaCO3 | — | Mean |
| Chloride | 35 mg/l | 250 mg/l | 14 % | Mean |
| Colour | <0,10 m-1 below limit of quantification | 0.5 m⁻¹ | — | Mean |
| Iron | <0,010 mg/l below limit of quantification | 0.2 mg/l | < 5 % * | Mean |
| Manganese | <0,010 mg/l below limit of quantification | 50 µg/l | < 20 % * | Mean |
| pH | 7,93 - | 6,5–9,5 | — | Mean |
| Sodium | 21,8 mg/l | 200 mg/l | 11 % | Mean |
| Sulphate | 97,1 mg/l | 250 mg/l | 39 % | Mean |
| Temperature | 11,40 °C | — | — | Mean |
| Total organic carbon (TOC) | 1,90 mg/l | ohne anormale Veränderung | — | Mean |
| Turbidity | <0,10 NTU below limit of quantification | 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 (9)
| Parameter | Value | Parametric value | Share of the parametric value | Reference |
|---|---|---|---|---|
| Acid capacity to pH 4.3 | 2,35 mmol/l | — | — | Mean |
| Base capacity to pH 8.2 | 0,0500 mmol/l | — | — | Mean |
| Calcium | 72,2 mg/l | — | — | Mean |
| Carbonate hardness | 6,85 °dH | — | — | Mean |
| Hardness range (WRMG) | mittel | — | — | Mean |
| Magnesium | 9,37 mg/l | — | — | Mean |
| Potassium | 4,76 mg/l | — | — | Mean |
| Sum of alkaline earth metals | 2,19 mmol/l | — | — | Mean |
| Total hardness | 12,30 °dH | — | — | 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.
Postcodes in this zone: 46499
Frequently asked questions about drinking water in Hamminkeln
- How hard is the water in Hamminkeln?
- Wasserwerke Wittenhorst (Eigenbetrieb des Wasserversorgungsverbandes Wittenhorst) publishes a total hardness of 12.3 °dH for the supply zone Wittenhorst (hardness range mittel). 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: 06.09.2024, retrieved on 11/07/2026.
- How much nitrate is in the drinking water in Hamminkeln?
- Wasserwerke Wittenhorst (Eigenbetrieb des Wasserversorgungsverbandes Wittenhorst) publishes a nitrate value of 10,2 mg/l for the supply zone Wittenhorst. The statutory parametric value is 50 mg/l; the measured value represents 20 % of the parametric value. Basis: 06.09.2024, retrieved on 11/07/2026.
- Who supplies the drinking water in Hamminkeln?
- Wasserwerke Wittenhorst (Eigenbetrieb des Wasserversorgungsverbandes Wittenhorst). The values shown here come from the supply zone Wittenhorst 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.