Drinking water in Langen
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
12 % Share of the parametric value. The proportion of the permitted maximum that the measured value uses — here 12 %, so just over an eighth.
< 10 % * Below the limit of quantification. The substance was not detectable. The mark shows where the detection limit lies relative to the parametric value — the actual share of the parametric value is below that.
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.
Langen (teilversorgt), Egelsbach (teilversorgt), Dreieich (Dreieichenhain, Götzenhain)
Zweckverband Wasserversorgung Stadt und Kreis OffenbachAssigned via the water supplier — the exact supply zone boundary within the postcode is not yet linked.
Water hardness
18.5 °dH
Hardness range hart
| Parameter | Value | Parametric value | Share of the parametric value | Reference |
|---|---|---|---|---|
| Nitrate | 14,7 mg/l | 50 mg/l | 29 % | Maximum |
| Lead | <1 µg/l below limit of quantification | 10 µg/l | < 10 % * | Maximum |
| Escherichia coli (E. coli) | 0 MPN/100ml | 0/100 ml | — | Maximum |
| Sulphate | 77,1 mg/l | 250 mg/l | 31 % | Maximum |
| Sodium | 11,3 mg/l | 200 mg/l | 6 % | Maximum |
* 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 (82 — most recent value per parameter)
Microbiology (2)
| Parameter | Value | Parametric value | Share of the parametric value | Reference |
|---|---|---|---|---|
| Escherichia coli (E. coli) | 0 MPN/100ml | 0/100 ml | — | Maximum |
| Intestinal enterococci | 0 KBE/ml | 0/100 ml | — | Maximum |
Chemical parameters (53)
| Parameter | Value | Parametric value | Share of the parametric value | Reference |
|---|---|---|---|---|
| 1,2-dichloroethane | <0,2 µg/l below limit of quantification | 3 µg/l | < 7 % * | Maximum |
| Acrylamide | <0,1 µg/l below limit of quantification | 0.1 µg/l | < 100 % * | Maximum |
| Antimony | <1 µg/l below limit of quantification | 5 µg/l | < 20 % * | Maximum |
| Arsenic | <1 µg/l below limit of quantification | 10 µg/l | < 10 % * | Maximum |
| Atrazine | <0,01 µg/l below limit of quantification | — | — | Maximum |
| Bentazone | <0,01 µg/l below limit of quantification | — | — | Maximum |
| Benzene | <0,3 µg/l below limit of quantification | 1 µg/l | < 30 % * | Maximum |
| Benzo(a)pyrene | <0,003 µg/l below limit of quantification | 10 ng/l | < 30 % * | Maximum |
| Bisphenol A | <0,1 µg/l below limit of quantification | 2.5 µg/l | < 4 % * | Maximum |
| Boron | 0,014 mg/l | 1 mg/l | 1 % | Maximum |
| Bromacil | <0,01 µg/l below limit of quantification | — | — | Maximum |
| Bromate | <0,0025 mg/l below limit of quantification | 10 µg/l | < 25 % * | Maximum |
| Bromodichloromethane | <0,3 µg/l below limit of quantification | — | — | Maximum |
| Cadmium | <0,9 µg/l below limit of quantification | 3 µg/l | < 30 % * | Maximum |
| Carbofuran | <0,01 µg/l below limit of quantification | — | — | Maximum |
| Chlorotoluron | <0,01 µg/l below limit of quantification | — | — | Maximum |
| Chromium | <0,5 µg/l below limit of quantification | 25 µg/l | < 2 % * | Maximum |
| Copper | <10 µg/l below limit of quantification | 2 mg/l | < 0.5 % * | Maximum |
| Cyanide | <0,01 mg/l below limit of quantification | 50 µg/l | < 20 % * | Maximum |
| Desethylatrazine | <0,01 µg/l below limit of quantification | — | — | Maximum |
| Desisopropylatrazine | <0,01 µg/l below limit of quantification | — | — | Maximum |
| Dibromochloromethane | <0,2 µg/l below limit of quantification | — | — | Maximum |
| Dichlorprop | <0,01 µg/l below limit of quantification | — | — | Maximum |
| Diuron | <0,01 µg/l below limit of quantification | — | — | Maximum |
| Epichlorohydrin | <0,1 µg/l below limit of quantification | 0.1 µg/l | < 100 % * | Maximum |
| Fluoride | 0,066 mg/l | 1.5 mg/l | 4 % | Maximum |
| Hexazinone | <0,01 µg/l below limit of quantification | — | — | Maximum |
| Isoproturon | <0,01 µg/l below limit of quantification | — | — | Maximum |
| Lead | <1 µg/l below limit of quantification | 10 µg/l | < 10 % * | Maximum |
| MCPA | <0,01 µg/l below limit of quantification | — | — | Maximum |
| Mecoprop | <0,01 µg/l below limit of quantification | — | — | Maximum |
| Mercury | <0,1 µg/l below limit of quantification | 1 µg/l | < 10 % * | Maximum |
| Metazachlor | <0,01 µg/l below limit of quantification | — | — | Maximum |
| Methabenzthiazuron | <0,01 µg/l below limit of quantification | — | — | Maximum |
| Metobromuron | <0,01 µg/l below limit of quantification | — | — | Maximum |
| Monuron | <0,01 µg/l below limit of quantification | — | — | Maximum |
| Nickel | <6 µg/l below limit of quantification | 20 µg/l | < 30 % * | Maximum |
| Nitrate | 14,7 mg/l | 50 mg/l | 29 % | Maximum |
| Nitrite | <0,03 mg/l below limit of quantification | 0.5 mg/l | < 6 % * | Maximum |
| Polycyclic aromatic hydrocarbons | < BG µg/l below limit of quantification | 0.1 µg/l | — | Maximum |
| Propazine | <0,01 µg/l below limit of quantification | — | — | Maximum |
| Sebuthylazine | <0,01 µg/l below limit of quantification | — | — | Maximum |
| Selenium | <3 µg/l below limit of quantification | 10 µg/l | < 30 % * | Maximum |
| Simazine | <0,01 µg/l below limit of quantification | — | — | Maximum |
| Terbuthylazine | <0,01 µg/l below limit of quantification | — | — | Maximum |
| Tetrachloroethene | <0,2 µg/l below limit of quantification | — | — | Maximum |
| Tetrachloroethene and Trichloroethene (sum) | <BG µg/l below limit of quantification | 10 µg/l | — | Maximum |
| Tribromomethane (bromoform) | <0,3 µg/l below limit of quantification | — | — | Maximum |
| Trichloroethene | <0,2 µg/l below limit of quantification | — | — | Maximum |
| Trichloromethane (chloroform) | <0,2 µg/l below limit of quantification | — | — | Maximum |
| Trihalomethanes — Total | <BG µg/l below limit of quantification | 50 µg/l | — | Maximum |
| Uranium | 4,24 µg/l | 10 µg/l | 42 % | Maximum |
| Vinyl chloride | <0,2 µg/l below limit of quantification | 0.5 µg/l | < 40 % * | Maximum |
* 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 | <0,02 mg/l below limit of quantification | 0.2 mg/l | < 10 % * | Maximum |
| Ammonium | <0,03 mg/l below limit of quantification | 0.5 mg/l | < 6 % * | Maximum |
| Calcite dissolution capacity | -7,1 mg/l | 5 mg/l CaCO3 | — | Maximum |
| Chloride | 26,8 mg/l | 250 mg/l | 11 % | Maximum |
| Coliform bacteria | 0 MPN/100ml | 0/100 ml | — | Maximum |
| Colony count 22 °C | 0 KBE/ml | ohne anormale Veränderung | — | Maximum |
| Colony count 36 °C | 2 KBE/ml | ohne anormale Veränderung | — | Maximum |
| Colour | <0,1 m-1 below limit of quantification | 0.5 m⁻¹ | — | Maximum |
| Iron | <0,01 mg/l below limit of quantification | 0.2 mg/l | < 5 % * | Maximum |
| Manganese | <0,01 mg/l below limit of quantification | 50 µg/l | < 20 % * | Maximum |
| Odour | ohne | für den Verbraucher annehmbar | — | Maximum |
| pH | 7,53 | 6,5–9,5 | — | Maximum |
| Sodium | 11,3 mg/l | 200 mg/l | 6 % | Maximum |
| Sulphate | 77,1 mg/l | 250 mg/l | 31 % | Maximum |
| Taste | ohne | für den Verbraucher annehmbar | — | Maximum |
| Temperature | 11,2 °C | — | — | Maximum |
| Total organic carbon (TOC) | 0,859 mg/l | ohne anormale Veränderung | — | Maximum |
| Turbidity | 0,174 NTU | 1 NTU | — | Maximum |
* 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 | 4,4 mmol/l | — | — | Maximum |
| Base capacity to pH 8.2 | 0,285 mmol/l | — | — | Maximum |
| Calcium | 104 mg/l | — | — | Maximum |
| Carbonate hardness | 12,360 °dKH | — | — | Maximum |
| Hardness range (WRMG) | hart | — | — | Maximum |
| Hydrogen carbonate | 266 mg/l | — | — | Maximum |
| Magnesium | 17,4 mg/l | — | — | Maximum |
| Potassium | 2,65 mg/l | — | — | Maximum |
| Total hardness | 18,5 °dH | — | — | Maximum |
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.
Source: https://www.zwo-wasser.de/files/VG6.pdf · 05.05.2026 · 1. Quartal 2026 · retrieved on 11/07/2026
Postcodes in this zone: 63225
Show 1 more supply zone
Rodgau (ohne Nieder-Roden), Mühlheim-Lämmerspiel, Obertshausen, Hanau-Steinheim, Hanau-Klein Auheim, Heusenstamm-Rembrücken
Zweckverband Wasserversorgung Stadt und Kreis OffenbachAssigned via the water supplier — the exact supply zone boundary within the postcode is not yet linked.
Water hardness
10.1 °dH
Hardness range weich
| Parameter | Value | Parametric value | Share of the parametric value | Reference |
|---|---|---|---|---|
| Sum of PFAS | < BG µg/l not detectable | 0.1 µg/l | — | Maximum |
| Nitrate | 12,2 mg/l | 50 mg/l | 24 % | Maximum |
| Lead | <3 µg/l below limit of quantification | 10 µg/l | < 30 % * | Maximum |
| Escherichia coli (E. coli) | 0 MPN/100ml | 0/100 ml | — | Maximum |
| Sulphate | 44 mg/l | 250 mg/l | 18 % | Maximum |
| Sodium | 11,7 mg/l | 200 mg/l | 6 % | Maximum |
* 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 (86 — most recent value per parameter)
Microbiology (2)
| Parameter | Value | Parametric value | Share of the parametric value | Reference |
|---|---|---|---|---|
| Escherichia coli (E. coli) | 0 MPN/100ml | 0/100 ml | — | Maximum |
| Intestinal enterococci | 0 KBE/ml | 0/100 ml | — | Maximum |
Chemical parameters (53)
| Parameter | Value | Parametric value | Share of the parametric value | Reference |
|---|---|---|---|---|
| 1,2-dichloroethane | <0,2 µg/l below limit of quantification | 3 µg/l | < 7 % * | Maximum |
| Acrylamide | <0,1 µg/l below limit of quantification | 0.1 µg/l | < 100 % * | Maximum |
| Antimony | <1 µg/l below limit of quantification | 5 µg/l | < 20 % * | Maximum |
| Arsenic | <3 µg/l below limit of quantification | 10 µg/l | < 30 % * | Maximum |
| Atrazine | <0,01 µg/l below limit of quantification | — | — | Maximum |
| Bentazone | <0,01 µg/l below limit of quantification | — | — | Maximum |
| Benzene | <0,3 µg/l below limit of quantification | 1 µg/l | < 30 % * | Maximum |
| Benzo(a)pyrene | <0,003 µg/l below limit of quantification | 10 ng/l | < 30 % * | Maximum |
| Bisphenol A | <0,1 µg/l below limit of quantification | 2.5 µg/l | < 4 % * | Maximum |
| Boron | <0,05 mg/l below limit of quantification | 1 mg/l | < 5 % * | Maximum |
| Bromacil | <0,01 µg/l below limit of quantification | — | — | Maximum |
| Bromate | <0,0025 mg/l below limit of quantification | 10 µg/l | < 25 % * | Maximum |
| Bromodichloromethane | <0,3 µg/l below limit of quantification | — | — | Maximum |
| Cadmium | <0,9 µg/l below limit of quantification | 3 µg/l | < 30 % * | Maximum |
| Carbofuran | <0,01 µg/l below limit of quantification | — | — | Maximum |
| Chlorotoluron | <0,01 µg/l below limit of quantification | — | — | Maximum |
| Chromium | <0,5 µg/l below limit of quantification | 25 µg/l | < 2 % * | Maximum |
| Copper | <10 µg/l below limit of quantification | 2 mg/l | < 0.5 % * | Maximum |
| Cyanide | <0,01 mg/l below limit of quantification | 50 µg/l | < 20 % * | Maximum |
| Desethylatrazine | <0,01 µg/l below limit of quantification | — | — | Maximum |
| Desisopropylatrazine | <0,01 µg/l below limit of quantification | — | — | Maximum |
| Dibromochloromethane | <0,2 µg/l below limit of quantification | — | — | Maximum |
| Dichlorprop | <0,01 µg/l below limit of quantification | — | — | Maximum |
| Diuron | <0,01 µg/l below limit of quantification | — | — | Maximum |
| Epichlorohydrin | <0,1 µg/l below limit of quantification | 0.1 µg/l | < 100 % * | Maximum |
| Fluoride | <0,05 mg/l below limit of quantification | 1.5 mg/l | < 3 % * | Maximum |
| Hexazinone | <0,01 µg/l below limit of quantification | — | — | Maximum |
| Isoproturon | <0,01 µg/l below limit of quantification | — | — | Maximum |
| Lead | <3 µg/l below limit of quantification | 10 µg/l | < 30 % * | Maximum |
| MCPA | <0,01 µg/l below limit of quantification | — | — | Maximum |
| Mecoprop | <0,01 µg/l below limit of quantification | — | — | Maximum |
| Mercury | <0,2 µg/l below limit of quantification | 1 µg/l | < 20 % * | Maximum |
| Metazachlor | <0,01 µg/l below limit of quantification | — | — | Maximum |
| Methabenzthiazuron | <0,01 µg/l below limit of quantification | — | — | Maximum |
| Metobromuron | <0,01 µg/l below limit of quantification | — | — | Maximum |
| Monuron | <0,01 µg/l below limit of quantification | — | — | Maximum |
| Nickel | <6 µg/l below limit of quantification | 20 µg/l | < 30 % * | Maximum |
| Nitrate | 12,2 mg/l | 50 mg/l | 24 % | Maximum |
| Nitrite | <0,03 mg/l below limit of quantification | 0.5 mg/l | < 6 % * | Maximum |
| Polycyclic aromatic hydrocarbons | < BG µg/l below limit of quantification | 0.1 µg/l | — | Maximum |
| Propazine | <0,01 µg/l below limit of quantification | — | — | Maximum |
| Sebuthylazine | <0,01 µg/l below limit of quantification | — | — | Maximum |
| Selenium | <3 µg/l below limit of quantification | 10 µg/l | < 30 % * | Maximum |
| Simazine | <0,01 µg/l below limit of quantification | — | — | Maximum |
| Terbuthylazine | <0,01 µg/l below limit of quantification | — | — | Maximum |
| Tetrachloroethene | 1,11 µg/l | — | — | Maximum |
| Tetrachloroethene and Trichloroethene (sum) | 1,5 µg/l | 10 µg/l | 15 % | Maximum |
| Tribromomethane (bromoform) | <0,3 µg/l below limit of quantification | — | — | Maximum |
| Trichloroethene | 0,39 µg/l | — | — | Maximum |
| Trichloromethane (chloroform) | <0,2 µg/l below limit of quantification | — | — | Maximum |
| Trihalomethanes — Total | < BG µg/l below limit of quantification | 50 µg/l | — | Maximum |
| Uranium | <0,5 µg/l below limit of quantification | 10 µg/l | < 5 % * | Maximum |
| Vinyl chloride | <0,1 µg/l below limit of quantification | 0.5 µg/l | < 20 % * | Maximum |
* 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 | < BG µg/l not detectable | — | — | Maximum |
| Sum of PFAS | < BG µg/l not detectable | 0.1 µg/l | — | Maximum |
Indicator parameters (19)
| Parameter | Value | Parametric value | Share of the parametric value | Reference |
|---|---|---|---|---|
| Aluminium | <0,02 mg/l below limit of quantification | 0.2 mg/l | < 10 % * | Maximum |
| Ammonium | <0,03 mg/l below limit of quantification | 0.5 mg/l | < 6 % * | Maximum |
| Calcite dissolution capacity | 0,708 mg/l | 5 mg/l CaCO3 | — | Maximum |
| Chloride | 23,2 mg/l | 250 mg/l | 9 % | Maximum |
| Coliform bacteria | 0 MPN/100ml | 0/100 ml | — | Maximum |
| Colony count 22 °C | 0 KBE/ml | ohne anormale Veränderung | — | Maximum |
| Colony count 36 °C | 2 KBE/ml | ohne anormale Veränderung | — | Maximum |
| Colour | <0,1 m-1 below limit of quantification | 0.5 m⁻¹ | — | Maximum |
| Conductivity (25 °C) | 439 µS/cm | 2,790 µS/cm | — | Maximum |
| Iron | 0,011 mg/l | 0.2 mg/l | 5 % | Maximum |
| Manganese | <0,01 mg/l below limit of quantification | 50 µg/l | < 20 % * | Maximum |
| Odour | ohne | für den Verbraucher annehmbar | — | Maximum |
| pH | 8,01 | 6,5–9,5 | — | Maximum |
| Sodium | 11,7 mg/l | 200 mg/l | 6 % | Maximum |
| Sulphate | 44 mg/l | 250 mg/l | 18 % | Maximum |
| Taste | ohne | für den Verbraucher annehmbar | — | Maximum |
| Temperature | 10,9 °C | — | — | Maximum |
| Total organic carbon (TOC) | 1,1 mg/l | ohne anormale Veränderung | — | Maximum |
| Turbidity | 0,242 NTU | 1 NTU | — | Maximum |
* 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 (10)
| Parameter | Value | Parametric value | Share of the parametric value | Reference |
|---|---|---|---|---|
| Acid capacity to pH 4.3 | 2,26 mmol/l | — | — | Maximum |
| Base capacity to pH 8.2 | 0,071 mmol/l | — | — | Maximum |
| Calcium | 53,3 mg/l | — | — | Maximum |
| Carbonate hardness | 6,348 °dKH | — | — | Maximum |
| Hardness range (WRMG) | weich | — | — | Maximum |
| Hydrogen carbonate | 135 mg/l | — | — | Maximum |
| Magnesium | 11,6 mg/l | — | — | Maximum |
| Oxygen | 10,2 mg/l | — | — | Maximum |
| Potassium | 2,2 mg/l | — | — | Maximum |
| Total hardness | 10,1 °dH | — | — | Maximum |
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.
Source: https://www.zwo-wasser.de/files/VG3.pdf · 05.05.2026 · 1. Quartal 2026 · retrieved on 11/07/2026
Postcodes in this zone: 63225
Frequently asked questions about drinking water in Langen
- How hard is the water in Langen?
- Zweckverband Wasserversorgung Stadt und Kreis Offenbach publishes a total hardness of 18.5 °dH for the supply zone Langen (teilversorgt), Egelsbach (teilversorgt), Dreieich (Dreieichenhain, Götzenhain) (hardness range hart). 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: 05.05.2026, retrieved on 11/07/2026.
- How much nitrate is in the drinking water in Langen?
- Zweckverband Wasserversorgung Stadt und Kreis Offenbach publishes a nitrate value of 14,7 mg/l for the supply zone Langen (teilversorgt), Egelsbach (teilversorgt), Dreieich (Dreieichenhain, Götzenhain). The statutory parametric value is 50 mg/l; the measured value represents 29 % of the parametric value. Basis: 05.05.2026, retrieved on 11/07/2026.
- Who supplies the drinking water in Langen?
- Zweckverband Wasserversorgung Stadt und Kreis Offenbach. The values shown here come from the supply zone Langen (teilversorgt), Egelsbach (teilversorgt), Dreieich (Dreieichenhain, Götzenhain) 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.