Drinking water in Leer
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.
WW Heisfelde - Reinwasser Werksabgang
Stadtwerke Leer AöRAssigned 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 | <0,030 µg/l below limit of quantification | 0.1 µg/l | < 30 % * | Single value |
| Nitrate | <1 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 |
| Sulphate | 55 mg/l | 250 mg/l | 22 % | Single value |
| Sodium | 20 mg/l | 200 mg/l | 10 % | 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 (88 — most recent value per parameter)
Chemical parameters (55)
| Parameter | Value | Parametric value | Share of the parametric value | Reference |
|---|---|---|---|---|
| 1,2-dichloroethane | <0,5 µg/l below limit of quantification | 3 µg/l | < 17 % * | Single value |
| 2,6-Dichlorobenzamide (BAM) | <0,000050 mg/l below limit of quantification | — | — | 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 | <0,000010 mg/l below limit of quantification | — | — | Single value |
| Bentazone | <0,000010 mg/l below limit of quantification | — | — | Single value |
| Benzene | <0,3 µg/l below limit of quantification | 1 µg/l | < 30 % * | Single value |
| Benzo(a)pyrene | <0,0030 µg/l below limit of quantification | 10 ng/l | < 30 % * | Single value |
| Benzo(b)fluoranthene | <0,030 µg/l below limit of quantification | — | — | Single value |
| Benzo(ghi)perylene | <0,030 µg/l below limit of quantification | — | — | Single value |
| Benzo(k)fluoranthene | <0,030 µg/l below limit of quantification | — | — | Single value |
| Bisphenol A | <0,10 µg/l below limit of quantification | 2.5 µg/l | < 4 % * | Single value |
| Boron | <0,10 mg/l below limit of quantification | 1 mg/l | < 10 % * | Single value |
| Bromacil | <0,000020 mg/l below limit of quantification | — | — | Single value |
| Bromate | <0,003 mg/l below limit of quantification | 10 µg/l | < 30 % * | Single value |
| Cadmium | <0,0003 mg/l below limit of quantification | 3 µg/l | < 10 % * | Single value |
| Chloridazon | <0,000020 mg/l below limit of quantification | — | — | Single value |
| Chlorotoluron | <0,000020 mg/l below limit of quantification | — | — | Single value |
| Chromium | 0,0006 mg/l | 25 µg/l | 2 % | Single value |
| Copper | <0,010 mg/l below limit of quantification | 2 mg/l | < 0.5 % * | Single value |
| Cyanide | <0,005 mg/l below limit of quantification | 50 µg/l | < 10 % * | Single value |
| Desethylatrazine | <0,000020 mg/l below limit of quantification | — | — | Single value |
| Desethylterbuthylazine | <0,000025 mg/l below limit of quantification | — | — | Single value |
| Desisopropylatrazine | <0,000025 mg/l below limit of quantification | — | — | Single value |
| Dichlorprop | <0,000020 mg/l below limit of quantification | — | — | Single value |
| Dimethachlor sulfonic acid | <0,000050 mg/l below limit of quantification | — | — | Single value |
| Diuron | <0,000020 mg/l below limit of quantification | — | — | Single value |
| Ethidimuron | <0,000050 mg/l below limit of quantification | — | — | Single value |
| Ethofumesate | <0,000050 mg/l below limit of quantification | — | — | Single value |
| Fluoride | <0,10 mg/l below limit of quantification | 1.5 mg/l | < 7 % * | Single value |
| Glyphosate | <0,000020 mg/l below limit of quantification | — | — | Single value |
| Indeno(1,2,3-cd)pyrene | <0,030 µg/l below limit of quantification | — | — | Single value |
| Isoproturon | <0,000020 mg/l below limit of quantification | — | — | Single value |
| Lead | <0,001 mg/l below limit of quantification | 10 µg/l | < 10 % * | Single value |
| MCPA | <0,000020 mg/l below limit of quantification | — | — | Single value |
| Mecoprop | <0,000010 mg/l below limit of quantification | — | — | Single value |
| Mercury | <0,0003 mg/l below limit of quantification | 1 µg/l | < 30 % * | Single value |
| Metalaxyl | <0,000020 mg/l below limit of quantification | — | — | Single value |
| Metamitron | <0,000060 mg/l below limit of quantification | — | — | Single value |
| Metazachlor | <0,000020 mg/l below limit of quantification | — | — | Single value |
| Metazachlor sulfonic acid | <0,000010 mg/l below limit of quantification | — | — | Single value |
| Metolachlor | <0,000010 mg/l below limit of quantification | — | — | Single value |
| Metolachlor acid | <0,000010 mg/l below limit of quantification | — | — | Single value |
| Metolachlor sulfonic acid | <0,000025 mg/l below limit of quantification | — | — | Single value |
| Metribuzin | <0,000020 mg/l below limit of quantification | — | — | Single value |
| Nickel | 0,001 mg/l | 20 µg/l | 5 % | Single value |
| Nitrate | <1 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 |
| Oxadixyl | <0,000050 mg/l below limit of quantification | — | — | Single value |
| Selenium | <0,001 mg/l below limit of quantification | 10 µg/l | < 10 % * | Single value |
| Simazine | <0,000010 mg/l below limit of quantification | — | — | Single value |
| Terbuthylazine | <0,000010 mg/l below limit of quantification | — | — | Single value |
| Tetrachloroethene | <0,5 µg/l below limit of quantification | — | — | Single value |
| Trichloroethene | <0,5 µg/l below limit of quantification | — | — | Single value |
| Uranium | <0,001 mg/l below limit of quantification | 10 µg/l | < 10 % * | 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.
PFAS (3)
| Parameter | Value | Parametric value | Share of the parametric value | Reference |
|---|---|---|---|---|
| Sum of 4 PFAS | <0,0060 µg/l below limit of quantification | — | — | Single value |
| Sum of PFAS | <0,030 µg/l below limit of quantification | 0.1 µg/l | < 30 % * | Single value |
| Trifluoroacetic acid (TFA) | <0,00030 mg/l below limit of quantification | 60 µg/l UBA guide value | < 0.5 % * | 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.
For trifluoroacetic acid (TFA), the German Drinking Water Ordinance does not specify a parametric value. The comparison is therefore made with the guide value of 60 µg/l issued by the Umweltbundesamt, which has replaced the earlier health-related guidance value of 3 µg/l. A guide value is not a legal maximum but a health-related classification.
Metabolites (4)
| Parameter | Value | Parametric value | Share of the parametric value | Reference |
|---|---|---|---|---|
| 1H-1,2,4-Triazole | <0,000050 mg/l below limit of quantification | — | — | Single value |
| Desphenyl-chloridazon | <0,000010 mg/l below limit of quantification | — | — | Single value |
| Dimethylsulfamide (DMS) | <0,000050 mg/l below limit of quantification | — | — | Single value |
| Methyl-desphenyl-chloridazon | <0,000025 mg/l below limit of quantification | — | — | Single value |
Indicator parameters (16)
| 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 | <0,05 mg/l below limit of quantification | 0.5 mg/l | < 10 % * | Single value |
| Calcite dissolution capacity | -0,1 mg/l | 5 mg/l CaCO3 | — | Single value |
| Chloride | 38 mg/l | 250 mg/l | 15 % | Single value |
| Colour | farblos Unit not stated in the document | 0.5 m⁻¹ | — | Single value |
| Conductivity (25 °C) | 440 µS/cm | 2,790 µS/cm | — | Single value |
| Iron | 0,011 mg/l | 0.2 mg/l | 5 % | Single value |
| Manganese | <0,005 mg/l below limit of quantification | 50 µg/l | < 10 % * | Single value |
| Odour | muffig | für den Verbraucher annehmbar | — | Single value |
| pH | 7,90 | 6,5–9,5 | — | Single value |
| Sodium | 20 mg/l | 200 mg/l | 10 % | Single value |
| Sulphate | 55 mg/l | 250 mg/l | 22 % | Single value |
| Taste | ohne | für den Verbraucher annehmbar | — | Single value |
| Temperature | 11,4 °C | — | — | Single value |
| Total organic carbon (TOC) | 5,2 mg/l | ohne anormale Veränderung | — | Single value |
| Turbidity | klar Unit not stated in the document | 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 (10)
| Parameter | Value | Parametric value | Share of the parametric value | Reference |
|---|---|---|---|---|
| Acid capacity to pH 4.3 | 1,94 mmol/l | — | — | Single value |
| Acid capacity to pH 8.2 | <0,05 mmol/l below limit of quantification | — | — | Single value |
| Base capacity to pH 8.2 | 0,06 mmol/l | — | — | Single value |
| Calcium | 7,0 °dH | — | — | Single value |
| Carbonate hardness | 5,4 °dH | — | — | Single value |
| Hydrogen carbonate | 2,6 mg/l | — | — | Single value |
| Magnesium | 5,9 mg/l | — | — | Single value |
| Potassium | 6,5 mg/l | — | — | Single value |
| Saturation index | 0,00 | — | — | Single value |
| Total hardness | 1,49 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: 26789
Show 1 more supply zone
westoverledingen gesamt
Wasserversorgungsverband Overledingen (WVO)Assigned via the water supplier — the exact supply zone boundary within the postcode is not yet linked.
No core values are available for this zone yet.
Postcodes in this zone: 26789
Frequently asked questions about drinking water in Leer
- How hard is the water in Leer?
- Stadtwerke Leer AöR publishes a total hardness of 1,49 mmol/l for the supply zone WW Heisfelde - Reinwasser Werksabgang — that corresponds to 8.4 °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: Pelm, den 17.06.2026, retrieved on 11/07/2026.
- How much nitrate is in the drinking water in Leer?
- Stadtwerke Leer AöR publishes a nitrate value of <1 mg/l for the supply zone WW Heisfelde - Reinwasser Werksabgang. 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: Pelm, den 17.06.2026, retrieved on 11/07/2026.
- Are PFAS detectable in the drinking water in Leer?
- Stadtwerke Leer AöR publishes for the supply zone WW Heisfelde - Reinwasser Werksabgang a sum value PFAS-20 below the limit of quantification (entry in the report: "<0,030 µg/l"). This is not to be read as "PFAS-free": below the limit of quantification, the measurement cannot make any statement. The statutory parametric value is 0.1 µg/l; the measured value lies below it and cannot be specified more precisely below the limit of quantification. For the sum of the 20 individual substances, this parametric value has applied since 12/01/2026. Basis: Pelm, den 17.06.2026, retrieved on 11/07/2026.
- Who supplies the drinking water in Leer?
- Stadtwerke Leer AöR. The values shown here come from the supply zone WW Heisfelde - Reinwasser Werksabgang 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.