Drinking water in Brühl
There are 2 places with this name — listed below by area. To determine the exact match, look up the postcode.
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.
Brühl (50321)
Köln linksrheinisch, Wasserwerke Hochkirchen und Weiler
RheinEnergie AGAssigned 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 | 19 mg/l | 50 mg/l | 38 % | Mean |
| Lead | < 0,0005 mg/l below limit of quantification | 10 µg/l | < 5 % * | Mean |
| Escherichia coli (E. coli) | 0 /100 ml | 0/100 ml | — | Mean |
| Sulphate | 69 mg/l | 250 mg/l | 28 % | Mean |
| Sodium | 34 mg/l | 200 mg/l | 17 % | 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 (55 — most recent value per parameter)
Microbiology (2)
| Parameter | Value | Parametric value | Share of the parametric value | Reference |
|---|---|---|---|---|
| Escherichia coli (E. coli) | 0 /100 ml | 0/100 ml | — | Mean |
| Intestinal enterococci | 0 /100 ml | 0/100 ml | — | Mean |
Chemical parameters (24)
| Parameter | Value | Parametric value | Share of the parametric value | Reference |
|---|---|---|---|---|
| 1,2-dichloroethane | < 0,0002 mg/l below limit of quantification | 3 µg/l | < 7 % * | Mean |
| Antimony | < 0,0005 mg/l below limit of quantification | 5 µg/l | < 10 % * | Mean |
| Arsenic | < 0,0005 mg/l below limit of quantification | 10 µg/l | < 5 % * | Mean |
| Benzene | < 0,0002 mg/l below limit of quantification | 1 µg/l | < 20 % * | Mean |
| Benzo(a)pyrene | < 0,000003 mg/l below limit of quantification | 10 ng/l | < 30 % * | Mean |
| Bisphenol A | < 0,00003 mg/l below limit of quantification | 2.5 µg/l | < 1 % * | Mean |
| Boron | 0,07 mg/l | 1 mg/l | 7 % | Mean |
| Bromate | < 0,003 mg/l below limit of quantification | 10 µg/l | < 30 % * | Mean |
| Cadmium | < 0,0001 mg/l below limit of quantification | 3 µg/l | < 3 % * | Mean |
| Chromium | < 0,0005 mg/l below limit of quantification | 25 µg/l | < 2 % * | Mean |
| Copper | < 0,02 mg/l below limit of quantification | 2 mg/l | < 1 % * | Mean |
| Cyanide | < 0,015 mg/l below limit of quantification | 50 µg/l | < 30 % * | Mean |
| Fluoride | 0,11 mg/l | 1.5 mg/l | 7 % | Mean |
| Lead | < 0,0005 mg/l below limit of quantification | 10 µg/l | < 5 % * | Mean |
| Mercury | < 0,0001 mg/l below limit of quantification | 1 µg/l | < 10 % * | Mean |
| Nickel | < 0,001 mg/l below limit of quantification | 20 µg/l | < 5 % * | Mean |
| Nitrate | 19 mg/l | 50 mg/l | 38 % | Mean |
| Nitrite | < 0,01 mg/l below limit of quantification | 0.5 mg/l | < 2 % * | Mean |
| Pesticides | < 0,0005 mg/l below limit of quantification | 0.1 µg/l | cannot be assessed — the limit of quantification of the measurement is above the parametric value | Mean |
| Polycyclic aromatic hydrocarbons | < 0,00008 mg/l below limit of quantification | 0.1 µg/l | < 80 % * | Mean |
| Selenium | 0,0006 mg/l | 10 µg/l | 6 % | Mean |
| Tetrachloroethene and Trichloroethene (sum) | < 0,00005 mg/l below limit of quantification | 10 µg/l | < 0.5 % * | Mean |
| Trihalomethanes — Total | 0,00003 mg/l | 50 µg/l | < 0.1 % | Mean |
| Uranium | 0,0003 mg/l | 10 µg/l | 3 % | 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 (18)
| Parameter | Value | Parametric value | Share of the parametric value | Reference |
|---|---|---|---|---|
| Aluminium | < 0,04 mg/l below limit of quantification | 0.2 mg/l | < 20 % * | Mean |
| Ammonium | < 0,05 mg/l below limit of quantification | 0.5 mg/l | < 10 % * | Mean |
| Calcite dissolution capacity | -5,2 mg/l | 5 mg/l CaCO3 | — | Mean |
| Chloride | 58 mg/l | 250 mg/l | 23 % | Mean |
| Colony count 22 °C | 0 /ml | ohne anormale Veränderung | — | Mean |
| Colony count 36 °C | 0 /ml | ohne anormale Veränderung | — | Mean |
| Colour | < 0,1 m-1 below limit of quantification | 0.5 m⁻¹ | — | Mean |
| Conductivity (25 °C) | 744 µS/cm | 2,790 µS/cm | — | Mean |
| Iron | < 0,02 mg/l below limit of quantification | 0.2 mg/l | < 10 % * | Mean |
| Manganese | < 0,001 mg/l below limit of quantification | 50 µg/l | < 2 % * | Mean |
| Odour | ohne anormale Veränderung | für den Verbraucher annehmbar | — | Single value |
| pH | 7,33 | 6,5–9,5 | — | Mean |
| Sodium | 34 mg/l | 200 mg/l | 17 % | Mean |
| Sulphate | 69 mg/l | 250 mg/l | 28 % | Mean |
| Taste | ohne anormale Veränderung | für den Verbraucher annehmbar | — | Single value |
| Temperature | 12,8 °C | — | — | Mean |
| Total organic carbon (TOC) | 0,43 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 (11)
| Parameter | Value | Parametric value | Share of the parametric value | Reference |
|---|---|---|---|---|
| Acid capacity to pH 4.3 | 4,3 mol/m³ | — | — | Mean |
| Base capacity to pH 8.2 | 0,41 mol/m³ | — | — | Mean |
| Calcium | 100 mg/l | — | — | Mean |
| Carbonate hardness | 12,0 °dH | — | — | Mean |
| Hardness range (WRMG) | hart | — | — | Single value |
| Hydrogen carbonate | 260 mg/l | — | — | Mean |
| Magnesium | 14 mg/l | — | — | Mean |
| Oxygen | 8 mg/l | — | — | Mean |
| Phosphate | < 0,05 below limit of quantification | — | — | Single value |
| Potassium | 4,3 mg/l | — | — | Mean |
| Total hardness | 3,04 mol/m³ | — | — | 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: 50321
Frequently asked questions about drinking water in Brühl
- How hard is the water in Brühl?
- RheinEnergie AG publishes a total hardness of 3,04 mol/m³ for the supply zone Köln linksrheinisch, Wasserwerke Hochkirchen und Weiler — that corresponds to 17.1 °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: Ausgabe 2025, retrieved on 11/07/2026.
- How much nitrate is in the drinking water in Brühl?
- RheinEnergie AG publishes a nitrate value of 19 mg/l for the supply zone Köln linksrheinisch, Wasserwerke Hochkirchen und Weiler. The statutory parametric value is 50 mg/l; the measured value represents 38 % of the parametric value. Basis: Ausgabe 2025, retrieved on 11/07/2026.
- Who supplies the drinking water in Brühl?
- RheinEnergie AG. The values shown here come from the supply zone Köln linksrheinisch, Wasserwerke Hochkirchen und Weiler 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.
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For postcode 68782 there is no verified assignment yet.