Drinking water in 40724
One supply zone, water supplier: Stadtwerke Hilden.
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.
Baumberg
Stadtwerke HildenAssigned 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 | 0,000.042 mg/l | — | — | Mean |
| Nitrate | 15,5 mg/l | 50 mg/l | 31 % | Mean |
| Lead | <0,001 mg/l below limit of quantification | 10 µg/l | < 10 % * | Mean |
| Escherichia coli (E. coli) | 0 Anzahl/100ml | 0/100 ml | — | Mean |
| Sulphate | 50,7 mg/l | 250 mg/l | 20 % | Mean |
| Sodium | 27,1 mg/l | 200 mg/l | 14 % | 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 (64 — most recent value per parameter)
Microbiology (2)
| Parameter | Value | Parametric value | Share of the parametric value | Reference |
|---|---|---|---|---|
| Escherichia coli (E. coli) | 0 Anzahl/100ml | 0/100 ml | — | Mean |
| Intestinal enterococci | 0 Anzahl/100ml | 0/100 ml | — | Mean |
Chemical parameters (32)
| Parameter | Value | Parametric value | Share of the parametric value | Reference |
|---|---|---|---|---|
| 1,2-dichloroethane | <0,000.5 mg/l below limit of quantification | 3 µg/l | — | Mean |
| Acrylamide | n.e.3.) mg/l not determined | 0.1 µg/l | — | 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 | <0,000.2 mg/l below limit of quantification | 1 µg/l | — | Mean |
| Benzo(a)pyrene | <0,000.0025 mg/l below limit of quantification | 10 ng/l | — | Mean |
| Bisphenol A | <0,001 Mg/l below limit of quantification | 2.5 µg/l | < 40 % * | Mean |
| Boron | 0.052 mg/l | 1 mg/l | 5 % | Mean |
| Bromate | <0,0025 mg/l below limit of quantification | 10 µg/l | < 25 % * | Mean |
| Cadmium | <0,000.2 mg/l below limit of quantification | 3 µg/l | — | Mean |
| Chlorate | n.e. 3.) mg/l not determined | 70 µg/l | — | Mean |
| Chlorite | n.e. 3.) mg/l not determined | 0.2 mg/l | — | Mean |
| Chromium | <0,0005 mg/l below limit of quantification | 25 µg/l | < 2 % * | Mean |
| Copper | <0,001 mg/l below limit of quantification | 2 mg/l | < < 0.1 % * | Mean |
| Cyanide | <0,005 mg/l below limit of quantification | 50 µg/l | < 10 % * | Mean |
| Epichlorohydrin | n.e. 3.) mg/l not determined | 0.1 µg/l | — | Mean |
| Fluoride | 0,06 mg/l | 1.5 mg/l | 4 % | Mean |
| Haloacetic acids (HAA) | n.e. 3.) mg/l not determined | — | — | Mean |
| Lead | <0,001 mg/l below limit of quantification | 10 µg/l | < 10 % * | Mean |
| Mercury | <0,000.1 mg/l below limit of quantification | 1 µg/l | — | Mean |
| Microcystin-LR | n.e. mg/l not determined | — | — | Mean |
| Nickel | 0,002 mg/l | 20 µg/l | 10 % | Mean |
| Nitrate | 15,5 mg/l | 50 mg/l | 31 % | Mean |
| Nitrite | <0,001 mg/l below limit of quantification | 0.5 mg/l | < 0.2 % * | Mean |
| Pesticides | n.b.4.) mg/l not determined | 0.1 µg/l | — | Mean |
| Pesticides — Total | n.b.4.) mg/l not determined | 0.5 µg/l | — | Mean |
| Polycyclic aromatic hydrocarbons | n.b.4.) mg/l not determined | 0.1 µg/l | — | Mean |
| Selenium | <0,001 mg/l below limit of quantification | 10 µg/l | < 10 % * | Mean |
| Tetrachloroethene and Trichloroethene (sum) | n.b.4.) mg/l not determined | 10 µg/l | — | Mean |
| Trihalomethanes — Total | n.b.4.) mg/l not determined | 50 µg/l | — | Mean |
| Uranium | <0,001 mg/l below limit of quantification | 10 µg/l | < 10 % * | Mean |
| Vinyl chloride | <0,000.5 mg/l below limit of quantification | 0.5 µg/l | — | 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 (1)
| Parameter | Value | Parametric value | Share of the parametric value | Reference |
|---|---|---|---|---|
| Sum of PFAS | 0,000.042 mg/l | — | — | Mean |
Indicator parameters (19)
| Parameter | Value | Parametric value | Share of the parametric value | Reference |
|---|---|---|---|---|
| Aluminium | <0,005 mg/l below limit of quantification | 0.2 mg/l | < 3 % * | Mean |
| Ammonium | <0,02 mg/l below limit of quantification | 0.5 mg/l | < 4 % * | Mean |
| Calcite dissolution capacity | 0,9 mg/l CaCO3 | 5 mg/l CaCO3 | — | Mean |
| Chloride | 28,4 mg/l | 250 mg/l | 11 % | Mean |
| Clostridium perfringens (including spores) | 0 Anzahl/100ml | 0/100 ml | — | Mean |
| Coliform bacteria | 0 Anzahl/100ml | 0/100 ml | — | Mean |
| Colour | <0,10 m -1 below limit of quantification | 0.5 m⁻¹ | — | Mean |
| Conductivity (25 °C) | 503 µS/cm | 2,790 µS/cm | — | Mean |
| Iron | <0,010 mg/l below limit of quantification | 0.2 mg/l | < 5 % * | Mean |
| Manganese | <0,001 mg/l below limit of quantification | 50 µg/l | < 2 % * | Mean |
| Odour | unauffällig - | für den Verbraucher annehmbar | — | Mean |
| Oxidisability | n.e. 3.) mg/l O2 not determined | 5 mg/l O2 | — | Mean |
| pH | 7,57 - | 6,5–9,5 | — | Mean |
| Sodium | 27,1 mg/l | 200 mg/l | 14 % | Mean |
| Sulphate | 50,7 mg/l | 250 mg/l | 20 % | Mean |
| Taste | unauffällig - | für den Verbraucher annehmbar | — | Mean |
| Temperature | 11,4 - 12,8 °C | — | — | Single value |
| Total organic carbon (TOC) | 1,4 mg/l | ohne anormale Veränderung | — | Mean |
| Turbidity | <0,03 FNU 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.
Radiology (3)
| Parameter | Value | Parametric value | Share of the parametric value | Reference |
|---|---|---|---|---|
| Indicative dose | <0,16.) mSv/a below limit of quantification | 0.1 mSv/a | — | Single value |
| Radon-222 | <10 6.) Bq/l below limit of quantification | 100 Bq/l | — | Single value |
| Tritium | n.e. 6.) Bq/l not determined | 100 Bq/l | — | Single value |
Further parameters (7)
| Parameter | Value | Parametric value | Share of the parametric value | Reference |
|---|---|---|---|---|
| Calcium | 61,2 mg/l | — | — | Single value |
| Carbonate hardness | 8,6 °dH | — | — | Single value |
| Magnesium | 10,3 mg/l | — | — | Single value |
| Oxygen | 6,9 mg/l | — | — | Single value |
| Phosphate | <0,837 mg/l below limit of quantification | — | — | Single value |
| Potassium | 3,0 mg/l | — | — | Single value |
| Silicate / silicic acid | 14,0 mg/l | — | — | 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.
Frequent questions about postcode 40724
- How much nitrate is in the drinking water in Postcode 40724?
- Stadtwerke Hilden publishes a nitrate value of 15,5 mg/l for the supply zone Baumberg. The statutory parametric value is 50 mg/l; the measured value represents 31 % of the parametric value. Basis: Stand Jan. 2026, retrieved on 11/07/2026.
- Who supplies the drinking water in Postcode 40724?
- Stadtwerke Hilden. The values shown here come from the supply zone Baumberg 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.