Drinking water in Aerzen
One supply zone, water supplier: Flecken Aerzen.
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.
NP Aerzen, Bauhof, Bahnnofstraße, 31855 Aerzen
Flecken AerzenAssigned via the water supplier — the exact supply zone boundary within the postcode is not yet linked.
No date is given for these values. The water supplier publishes the analysis without a sampling date and without a report date. When the water was examined is not apparent from the source — we do not add a date and we do not estimate one. What is stated is therefore only when we retrieved the document.
| Parameter | Value | Parametric value | Share of the parametric value | Reference |
|---|---|---|---|---|
| Nitrate | 40 mg/l | 50 mg/l | 80 % | Single value |
| Lead | <0.0015 mg/l below limit of quantification | 10 µg/l | < 15 % * | Single value |
| Escherichia coli (E. coli) | 0 MPN/100 ml | 0/100 ml | — | Single value |
| Sulphate | 45 mg/l | 250 mg/l | 18 % | Single value |
| Sodium | 9.2 mg/l | 200 mg/l | 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.
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 MPN/100 ml | 0/100 ml | — | Single value |
| Intestinal enterococci | 0 KBE/100 ml | 0/100 ml | — | Single value |
Chemical parameters (29)
| Parameter | Value | Parametric value | Share of the parametric value | Reference |
|---|---|---|---|---|
| 1,2-dichloroethane | <0.0009 mg/l below limit of quantification | 3 µg/l | < 30 % * | Single value |
| Antimony | <0.0015 mg/l below limit of quantification | 5 µg/l | < 30 % * | Single value |
| Arsenic | <0.003 mg/l below limit of quantification | 10 µg/l | < 30 % * | Single value |
| Benzene | <0.00030 (1) mg/l below limit of quantification | 1 µg/l | — | Single value |
| Benzo(a)pyrene | <0.000003 (1) mg/l below limit of quantification | 10 ng/l | — | Single value |
| Benzo(b)fluoranthene | <0.00002 (1) mg/l below limit of quantification | — | — | Single value |
| Benzo(ghi)perylene | <0.00002 (1) mg/l below limit of quantification | — | — | Single value |
| Benzo(k)fluoranthene | <0.00002 (1) mg/l below limit of quantification | — | — | Single value |
| Boron | <0.1 mg/l below limit of quantification | 1 mg/l | < 10 % * | Single value |
| Bromate | <0.003 (1) mg/l below limit of quantification | 10 µg/l | — | Single value |
| Bromodichloromethane | <0.0005 mg/l below limit of quantification | — | — | Single value |
| Cadmium | <0.0010 mg/l below limit of quantification | 3 µg/l | < 33 % * | Single value |
| Chromium | 0.0009 mg/l | 25 µg/l | 4 % | Single value |
| Copper | 0.012 mg/l | 2 mg/l | 0.6 % | Single value |
| Cyanide | <0.005 (1) mg/l below limit of quantification | 50 µg/l | — | Single value |
| Dibromochloromethane | <0.0005 mg/l below limit of quantification | — | — | Single value |
| Fluoride | <0.45 mg/l below limit of quantification | 1.5 mg/l | < 30 % * | Single value |
| Lead | <0.0015 mg/l below limit of quantification | 10 µg/l | < 15 % * | Single value |
| Mercury | <0.0003 mg/l below limit of quantification | 1 µg/l | < 30 % * | Single value |
| Nickel | <0.005 mg/l below limit of quantification | 20 µg/l | < 25 % * | Single value |
| Nitrate | 40 mg/l | 50 mg/l | 80 % | Single value |
| Nitrite | <0.01 mg/l below limit of quantification | 0.5 mg/l | < 2 % * | Single value |
| Polycyclic aromatic hydrocarbons | <0.00003 (1) mg/l below limit of quantification | 0.1 µg/l | — | Single value |
| Selenium | <0.003 mg/l below limit of quantification | 10 µg/l | < 30 % * | Single value |
| Tetrachloroethene | 0.0011 mg/l | — | — | Single value |
| Tribromomethane (bromoform) | <0.0005 mg/l below limit of quantification | — | — | Single value |
| Trichloroethene | 0.0005 mg/l | — | — | Single value |
| Trichloromethane (chloroform) | <0.0005 mg/l below limit of quantification | — | — | Single value |
| Uranium | <0.003 mg/l below limit of quantification | 10 µg/l | < 30 % * | 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 (17)
| Parameter | Value | Parametric value | Share of the parametric value | Reference |
|---|---|---|---|---|
| Aluminium | <0.01 mg/l below limit of quantification | 0.2 mg/l | < 5 % * | Single value |
| Ammonium | <0.04 mg/l below limit of quantification | 0.5 mg/l | < 8 % * | Single value |
| Chloride | 28 mg/l | 250 mg/l | 11 % | Single value |
| Coliform bacteria | 0 MPN/100 ml | 0/100 ml | — | Single value |
| Colony count 22 °C | 3 KBE/ml | ohne anormale Veränderung | — | Single value |
| Colony count 36 °C | 0 KBE/ml | ohne anormale Veränderung | — | Single value |
| Colour | <0.100 1/m below limit of quantification | 0.5 m⁻¹ | — | Single value |
| Conductivity (25 °C) | 701 µS/cm | 2,790 µS/cm | — | Single value |
| Iron | <0.05 mg/l below limit of quantification | 0.2 mg/l | < 25 % * | Single value |
| Manganese | <0.015 mg/l below limit of quantification | 50 µg/l | < 30 % * | Single value |
| Odour | ohne | für den Verbraucher annehmbar | — | Single value |
| Sodium | 9.2 mg/l | 200 mg/l | 5 % | Single value |
| Sulphate | 45 mg/l | 250 mg/l | 18 % | Single value |
| Taste | normal | für den Verbraucher annehmbar | — | Single value |
| Temperature | 15.9 °C | — | — | Single value |
| Total organic carbon (TOC) | <1 mg/l below limit of quantification | ohne anormale Veränderung | — | Single value |
| Turbidity | 0.06 FNU | 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 (7)
| Parameter | Value | Parametric value | Share of the parametric value | Reference |
|---|---|---|---|---|
| Acid capacity to pH 4.3 | 5.3 mmol/l | — | — | Single value |
| Calcium | 100.5 mg/l | — | — | Single value |
| Carbonate hardness | 14.9 °dH | — | — | Single value |
| Magnesium | 22.1 mg/l | — | — | Single value |
| Oxygen | 7.58 (2) mg/l | — | — | Single value |
| Potassium | 2.4 mg/l | — | — | Single value |
| Total hardness | 3.4 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: 31855
Frequently asked questions about drinking water in Aerzen
- How hard is the water in Aerzen?
- Flecken Aerzen publishes a total hardness of 3.4 mmol/l for the supply zone NP Aerzen, Bauhof, Bahnnofstraße, 31855 Aerzen — that corresponds to 19.1 °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: 07.08.23, retrieved on 13/07/2026.
- How much nitrate is in the drinking water in Aerzen?
- Flecken Aerzen publishes a nitrate value of 40 mg/l for the supply zone NP Aerzen, Bauhof, Bahnnofstraße, 31855 Aerzen. The statutory parametric value is 50 mg/l; the measured value represents 80 % of the parametric value. Basis: 07.08.23, retrieved on 13/07/2026.
- Who supplies the drinking water in Aerzen?
- Flecken Aerzen. The values shown here come from the supply zone NP Aerzen, Bauhof, Bahnnofstraße, 31855 Aerzen 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.