Drinking water in Jülich
2 supply zones — values can differ depending on the district. Below is the zone with the most documented parameters, the others collapsed underneath. 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.
Trinkwasser TWA Aldenhoven
Verbandswasserwerk Aldenhoven (EWV)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 02/05/2022. 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 | < 0,5 mg/l below limit of quantification | 50 mg/l | < 1 % * | Single value |
| Lead | < 0,003 mg/l below limit of quantification | 10 µg/l | < 30 % * | Single value |
| Escherichia coli (E. coli) | 0 in 100 ml | 0/100 ml | — | Single value |
| Sulphate | 6,2 mg/l | 250 mg/l | 2 % | Single value |
| Sodium | 6,68 mg/l | 200 mg/l | 3 % | Single value |
* 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 (57 — most recent value per parameter)
Microbiology (2)
| Parameter | Value | Parametric value | Share of the parametric value | Reference |
|---|---|---|---|---|
| Escherichia coli (E. coli) | 0 in 100 ml | 0/100 ml | — | Single value |
| Intestinal enterococci | 0 in 100 ml | 0/100 ml | — | Single value |
Chemical parameters (24)
| 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 % * | Single value |
| Acrylamide | < 0,000025 mg/l below limit of quantification | 0.1 µg/l | < 25 % * | Single value |
| Antimony | < 0,001 mg/l below limit of quantification | 5 µg/l | < 20 % * | Single value |
| Arsenic | < 0,001 mg/l below limit of quantification | 10 µg/l | < 10 % * | Single value |
| Benzene | < 0,0001 mg/l below limit of quantification | 1 µg/l | < 10 % * | Single value |
| Benzo(a)pyrene | < 0,000002 mg/l below limit of quantification | 10 ng/l | < 20 % * | Single value |
| Boron | < 0,01 mg/l below limit of quantification | 1 mg/l | < 1 % * | Single value |
| Bromate | < 0,001 mg/l below limit of quantification | 10 µg/l | < 10 % * | Single value |
| Cadmium | < 0,001 mg/l below limit of quantification | 3 µg/l | < 33 % * | Single value |
| Chromium | 0,0006 mg/l | 25 µg/l | 2 % | Single value |
| Copper | 0,008 mg/l | 2 mg/l | 0.4 % | Single value |
| Cyanide | < 0,01 mg/l below limit of quantification | 50 µg/l | < 20 % * | Single value |
| Fluoride | 0,14 mg/l | 1.5 mg/l | 9 % | Single value |
| Lead | < 0,003 mg/l below limit of quantification | 10 µg/l | < 30 % * | Single value |
| Mercury | < 0,0001 mg/l below limit of quantification | 1 µg/l | < 10 % * | Single value |
| Nickel | < 0,005 mg/l below limit of quantification | 20 µg/l | < 25 % * | Single value |
| Nitrate | < 0,5 mg/l below limit of quantification | 50 mg/l | < 1 % * | Single value |
| Nitrite | < 0,02 mg/l below limit of quantification | 0.5 mg/l | < 4 % * | Single value |
| Polycyclic aromatic hydrocarbons | nicht nachweisbar mg/l not detectable | 0.1 µg/l | — | Single value |
| Selenium | < 0,001 mg/l below limit of quantification | 10 µg/l | < 10 % * | Single value |
| Tetrachloroethene and Trichloroethene (sum) | < 0,0002 mg/l below limit of quantification | 10 µg/l | < 2 % * | Single value |
| Trihalomethanes — Total | nicht nachweisbar mg/l not detectable | 50 µg/l | — | Single value |
| Uranium | < 0,0001 mg/l below limit of quantification | 10 µg/l | < 1 % * | Single value |
| Vinyl chloride | < 0,0005 mg/l below limit of quantification | 0.5 µg/l | < 100 % * | Single value |
* 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 (20)
| Parameter | Value | Parametric value | Share of the parametric value | Reference |
|---|---|---|---|---|
| Aluminium | < 0,010 mg/l below limit of quantification | 0.2 mg/l | < 5 % * | Single value |
| Ammonium | < 0,03 mg/l below limit of quantification | 0.5 mg/l | < 6 % * | Single value |
| Calcite dissolution capacity | -4,8 mg/l | 5 mg/l CaCO3 | — | Single value |
| Chloride | 7,7 mg/l | 250 mg/l | 3 % | Single value |
| Clostridium perfringens (including spores) | 0 in 100 ml | 0/100 ml | — | Single value |
| Coliform bacteria | 0 in 100 ml | 0/100 ml | — | Single value |
| Colony count 22 °C | 0 in 1ml | ohne anormale Veränderung | — | Single value |
| Colony count 36 °C | 0 in 1ml | ohne anormale Veränderung | — | Single value |
| Colour | < 0,1 m-1 below limit of quantification | 0.5 m⁻¹ | — | Single value |
| Conductivity (25 °C) | 455 µS/cm | 2,790 µS/cm | — | Single value |
| Iron | < 0,01 mg/l below limit of quantification | 0.2 mg/l | < 5 % * | Single value |
| Manganese | < 0,005 mg/l below limit of quantification | 50 µg/l | < 10 % * | Single value |
| Odour | ohne anormale Veränderung - | für den Verbraucher annehmbar | — | Single value |
| pH | 7,28 - | 6,5–9,5 | — | Single value |
| Sodium | 6,68 mg/l | 200 mg/l | 3 % | Single value |
| Sulphate | 6,2 mg/l | 250 mg/l | 2 % | Single value |
| Taste | ohne anormale Veränderung - | für den Verbraucher annehmbar | — | Single value |
| Temperature | 12,9 °C | — | — | Single value |
| Total organic carbon (TOC) | 1,9 mg/l | ohne anormale Veränderung | — | Single value |
| Turbidity | 0,03 NTU | 1 NTU | — | Single value |
* 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.
Treatment substances (1)
| Parameter | Value | Parametric value | Share of the parametric value | Reference |
|---|---|---|---|---|
| Total chlorine | 0,13 mg/l | — | — | Single value |
Further parameters (10)
| Parameter | Value | Parametric value | Share of the parametric value | Reference |
|---|---|---|---|---|
| Acid capacity to pH 4.3 | 4,71 mmol/l | — | — | Single value |
| Base capacity to pH 8.2 | 0,49 mmol/l | — | — | Single value |
| Calcium | 72,5 mg/l | — | — | Single value |
| Carbonate hardness | 12,5 °dH | — | — | Single value |
| Hardness range (WRMG) | mittel - | — | — | Single value |
| Magnesium | 13,0 mg/l | — | — | Single value |
| Oxygen | 10,42 mg/l | — | — | Single value |
| Phosphate | 1,99 mg/l | — | — | Single value |
| Potassium | 1,43 mg/l | — | — | Single value |
| Total hardness | 12,5 °dH | — | — | 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.
Postcodes in this zone: 52428
Show 1 more supply zone
Wasserwerk Ausgang
Stadtwerke Jülich GmbHAssigned 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 04/11/2024. 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 | < 1,0 mg/l below limit of quantification | 50 mg/l | < 2 % * | Single value |
| Lead | < 0,001 mg/l below limit of quantification | 10 µg/l | < 10 % * | Single value |
| Escherichia coli (E. coli) | 0 MPN/100 ml | 0/100 ml | — | Single value |
| Sulphate | 85 mg/l | 250 mg/l | 34 % | Single value |
| Sodium | 15,4 mg/l | 200 mg/l | 8 % | Single value |
* 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 (92 — most recent value per parameter)
Microbiology (2)
| Parameter | Value | Parametric value | Share of the parametric value | Reference |
|---|---|---|---|---|
| Escherichia coli (E. coli) | 0 MPN/100 ml | 0/100 ml | — | Single value |
| Intestinal enterococci | 0 KBE/100 ml | 0/100 ml | — | Single value |
Chemical parameters (59)
| Parameter | Value | Parametric value | Share of the parametric value | Reference |
|---|---|---|---|---|
| 1,2-dichloroethane | < 0,0005 mg/l below limit of quantification | 3 µg/l | < 17 % * | Single value |
| 1,2-Dichloropropane | < 0,1 µg/l below limit of quantification | — | — | Single value |
| 2,4-D | < 0,00002 mg/l below limit of quantification | — | — | Single value |
| Acrylamide | < 0,00003 mg/l below limit of quantification | 0.1 µg/l | < 30 % * | Single value |
| Antimony | < 0,001 mg/l below limit of quantification | 5 µg/l | < 20 % * | Single value |
| Arsenic | < 0,001 mg/l below limit of quantification | 10 µg/l | < 10 % * | Single value |
| Atrazine | < 0,000025 mg/l below limit of quantification | — | — | Single value |
| Bentazone | < 0,00002 mg/l below limit of quantification | — | — | Single value |
| Benzene | < 0,00025 mg/l below limit of quantification | 1 µg/l | < 25 % * | Single value |
| Benzo(a)pyrene | < 0,000001 mg/l below limit of quantification | 10 ng/l | < 10 % * | Single value |
| Benzo(b)fluoranthene | < 0,000001 mg/l below limit of quantification | — | — | Single value |
| Benzo(ghi)perylene | < 0,000001 mg/l below limit of quantification | — | — | Single value |
| Benzo(k)fluoranthene | < 0,000001 mg/l below limit of quantification | — | — | Single value |
| Bisphenol A | < 0,0005 mg/l below limit of quantification | 2.5 µg/l | < 20 % * | Single value |
| Boron | < 0,02 mg/l below limit of quantification | 1 mg/l | < 2 % * | Single value |
| Bromacil | < 0,000025 mg/l below limit of quantification | — | — | Single value |
| Bromate | < 0,0025 mg/l below limit of quantification | 10 µg/l | < 25 % * | Single value |
| Bromodichloromethane | < 0,0005 mg/l below limit of quantification | — | — | Single value |
| Cadmium | < 0,0001 mg/l below limit of quantification | 3 µg/l | < 3 % * | Single value |
| Carbofuran | < 0,000025 mg/l below limit of quantification | — | — | Single value |
| Chloridazon | < 0,000025 mg/l below limit of quantification | — | — | Single value |
| Chlorotoluron | < 0,000025 mg/l below limit of quantification | — | — | Single value |
| Chromium | 0,0230 mg/l | 25 µg/l | 92 % | Single value |
| Clopyralid | < 0,00005 mg/l below limit of quantification | — | — | Single value |
| Copper | 0,007 mg/l | 2 mg/l | 0.4 % | Single value |
| Cyanide | < 0,005 mg/l below limit of quantification | 50 µg/l | < 10 % * | Single value |
| Dibromochloromethane | < 0,0005 mg/l below limit of quantification | — | — | Single value |
| Dicamba | < 0,00005 mg/l below limit of quantification | — | — | Single value |
| Dichlorprop | < 0,00002 mg/l below limit of quantification | — | — | Single value |
| Diuron | < 0,000025 mg/l below limit of quantification | — | — | Single value |
| Fluoride | < 0,15 mg/l below limit of quantification | 1.5 mg/l | < 10 % * | Single value |
| Glyphosate | < 0,00005 mg/l below limit of quantification | — | — | Single value |
| Hexazinone | < 0,000025 mg/l below limit of quantification | — | — | Single value |
| Indeno(1,2,3-cd)pyrene | < 0,000001 mg/l below limit of quantification | — | — | Single value |
| Isoproturon | < 0,000025 mg/l below limit of quantification | — | — | Single value |
| Lead | < 0,001 mg/l below limit of quantification | 10 µg/l | < 10 % * | Single value |
| MCPA | < 0,00002 mg/l below limit of quantification | — | — | Single value |
| Mecoprop | < 0,00002 mg/l below limit of quantification | — | — | Single value |
| Mercury | < 0,0001 mg/l below limit of quantification | 1 µg/l | < 10 % * | Single value |
| Metazachlor | < 0,000025 mg/l below limit of quantification | — | — | Single value |
| Methabenzthiazuron | < 0,000025 mg/l below limit of quantification | — | — | Single value |
| Metobromuron | < 0,000025 mg/l below limit of quantification | — | — | Single value |
| Metolachlor | < 0,000025 mg/l below limit of quantification | — | — | Single value |
| Metoxuron | < 0,000025 mg/l below limit of quantification | — | — | Single value |
| Monuron | < 0,000025 mg/l below limit of quantification | — | — | Single value |
| Nickel | 0,017 mg/l | 20 µg/l | 85 % | Single value |
| Nitrate | < 1,0 mg/l below limit of quantification | 50 mg/l | < 2 % * | Single value |
| Nitrite | < 0,01 mg/l below limit of quantification | 0.5 mg/l | < 2 % * | Single value |
| Propazine | < 0,000025 mg/l below limit of quantification | — | — | Single value |
| Selenium | < 0,001 mg/l below limit of quantification | 10 µg/l | < 10 % * | Single value |
| Simazine | < 0,000025 mg/l below limit of quantification | — | — | Single value |
| Terbuthylazine | < 0,000025 mg/l below limit of quantification | — | — | Single value |
| Tetrachloroethene | < 0,0005 mg/l below limit of quantification | — | — | Single value |
| Tribromomethane (bromoform) | < 0,0005 mg/l below limit of quantification | — | — | Single value |
| Trichloroethene | < 0,0005 mg/l below limit of quantification | — | — | Single value |
| Trichloromethane (chloroform) | < 0,0005 mg/l below limit of quantification | — | — | Single value |
| Trihalomethanes — Total | (n. b.) mg/l not determined | 50 µg/l | — | Single value |
| Uranium | < 0,0001 mg/l below limit of quantification | 10 µg/l | < 1 % * | Single value |
| Vinyl chloride | < 0,0005 mg/l below limit of quantification | 0.5 µg/l | < 100 % * | Single value |
* 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.
Metabolites (1)
| Parameter | Value | Parametric value | Share of the parametric value | Reference |
|---|---|---|---|---|
| Desphenyl-chloridazon | < 0,000025 mg/l below limit of quantification | — | — | Single value |
Indicator parameters (18)
| Parameter | Value | Parametric value | Share of the parametric value | Reference |
|---|---|---|---|---|
| Aluminium | 0,033 mg/l | 0.2 mg/l | 17 % | Single value |
| Ammonium | < 0,06 mg/l below limit of quantification | 0.5 mg/l | < 12 % * | Single value |
| Calcite dissolution capacity | 4,8 mg/l | 5 mg/l CaCO3 | — | Single value |
| Chloride | 19 mg/l | 250 mg/l | 8 % | Single value |
| Coliform bacteria | 0 MPN/100 ml | 0/100 ml | — | Single value |
| Colony count 22 °C | 0 KBE/1 ml | ohne anormale Veränderung | — | Single value |
| Colony count 36 °C | 0 KBE/1 ml | ohne anormale Veränderung | — | Single value |
| Conductivity (25 °C) | 496 µS/cm | 2,790 µS/cm | — | Single value |
| Iron | 0,116 mg/l | 0.2 mg/l | 58 % | Single value |
| Manganese | 0,007 mg/l | 50 µg/l | 14 % | Single value |
| Odour | ohne | für den Verbraucher annehmbar | — | Single value |
| pH | 7,5 | 6,5–9,5 | — | Single value |
| Sodium | 15,4 mg/l | 200 mg/l | 8 % | Single value |
| Sulphate | 85 mg/l | 250 mg/l | 34 % | Single value |
| Taste | ohne | für den Verbraucher annehmbar | — | Single value |
| Temperature | 14,6 °C | — | — | Single value |
| Total organic carbon (TOC) | 1,5 mg/l | ohne anormale Veränderung | — | Single value |
| Turbidity | < 0,10 FNU below limit of quantification | 1 NTU | — | Single value |
* 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 (12)
| Parameter | Value | Parametric value | Share of the parametric value | Reference |
|---|---|---|---|---|
| Acid capacity to pH 4.3 | 2,8 mmol/l | — | — | Single value |
| Base capacity to pH 8.2 | 0,2 mmol/l | — | — | Single value |
| Calcium | 55,4 mg/l | — | — | Single value |
| Carbonate hardness | 1,41 mmol/l | — | — | Single value |
| Free carbon dioxide | 8,62 mg/l | — | — | Single value |
| Hardness range (WRMG) | mittel | — | — | Single value |
| Magnesium | 19,7 mg/l | — | — | Single value |
| Phosphate | < 0,6 mg/l below limit of quantification | — | — | Single value |
| Potassium | 4,4 mg/l | — | — | Single value |
| Saturation index | 0,15 | — | — | Single value |
| Silicate / silicic acid | 10,5 mg/l | — | — | Single value |
| Total hardness | 2,19 mmol/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.
Postcodes in this zone: 52428
Frequently asked questions about drinking water in Jülich
- How hard is the water in Jülich?
- Verbandswasserwerk Aldenhoven (EWV) publishes a total hardness of 12.5 °dH for the supply zone Trinkwasser TWA Aldenhoven (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: Publication by the water supplier, retrieved on 11/07/2026.
- How much nitrate is in the drinking water in Jülich?
- Verbandswasserwerk Aldenhoven (EWV) publishes a nitrate value of < 0,5 mg/l for the supply zone Trinkwasser TWA Aldenhoven. The statutory parametric value is 50 mg/l; the measured value lies below it and cannot be specified more precisely below the limit of quantification. Basis: Publication by the water supplier, retrieved on 11/07/2026.
- Who supplies the drinking water in Jülich?
- Verbandswasserwerk Aldenhoven (EWV). The values shown here come from the supply zone Trinkwasser TWA Aldenhoven 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.