Drinking water in 21775
For this postcode Wasser- und Bodenverbände Otterndorf publishes several supply zones. Which of them serves an individual address is not published — below are the values of the zone with the most documented parameters, the remaining 2 underneath.
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.
Altenwalde
Wasser- und Bodenverbände OtterndorfAssigned 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 | 9,5 mg/l | 50 mg/l | 19 % | Single value · Altenwalde |
Show all recorded parameters (7 — most recent value per parameter)
Chemical parameters (2)
| Parameter | Value | Parametric value | Share of the parametric value | Reference |
|---|---|---|---|---|
| Fluoride | 0,06 mg/l | 1.5 mg/l | 4 % | Single value · Altenwalde |
| Nitrate | 9,5 mg/l | 50 mg/l | 19 % | Single value · Altenwalde |
Indicator parameters (2)
| Parameter | Value | Parametric value | Share of the parametric value | Reference |
|---|---|---|---|---|
| Iron | <0,010 mg/l below limit of quantification | 0.2 mg/l | < 5 % * | Single value · Altenwalde |
| pH | 7,70 | 6,5–9,5 | — | Single value · Altenwalde |
* 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 (3)
| Parameter | Value | Parametric value | Share of the parametric value | Reference |
|---|---|---|---|---|
| Calcium | 43,4 mg/l | — | — | Single value · Altenwalde |
| Hardness range (WRMG) | 1 | — | — | Single value · Altenwalde |
| Total hardness | 8,3 °dH | — | — | Single value · Altenwalde |
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.
Show 2 more supply zones in this postcode
Grenzwert nach TrinkwV
Wasser- und Bodenverbände OtterndorfAssigned 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 | mg/l | 50 mg/l | — | Single value · Grenzwert nach TrinkwV |
Show all recorded parameters (7 — most recent value per parameter)
Chemical parameters (2)
| Parameter | Value | Parametric value | Share of the parametric value | Reference |
|---|---|---|---|---|
| Fluoride | mg/l | 1.5 mg/l | — | Single value · Grenzwert nach TrinkwV |
| Nitrate | mg/l | 50 mg/l | — | Single value · Grenzwert nach TrinkwV |
Indicator parameters (2)
| Parameter | Value | Parametric value | Share of the parametric value | Reference |
|---|---|---|---|---|
| Iron | mg/l | 0.2 mg/l | — | Single value · Grenzwert nach TrinkwV |
| pH | 6,5–9,5 | — | Single value · Grenzwert nach TrinkwV |
Further parameters (3)
| Parameter | Value | Parametric value | Share of the parametric value | Reference |
|---|---|---|---|---|
| Calcium | mg/l | — | — | Single value · Grenzwert nach TrinkwV |
| Hardness range (WRMG) | — | — | Single value · Grenzwert nach TrinkwV | |
| Total hardness | °dH | — | — | Single value · Grenzwert nach TrinkwV |
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.
Assigned 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 | 18,5 mg/l | 50 mg/l | 37 % | Single value · Wanna |
Show all recorded parameters (7 — most recent value per parameter)
Chemical parameters (2)
| Parameter | Value | Parametric value | Share of the parametric value | Reference |
|---|---|---|---|---|
| Fluoride | 0,09 mg/l | 1.5 mg/l | 6 % | Single value · Wanna |
| Nitrate | 18,5 mg/l | 50 mg/l | 37 % | Single value · Wanna |
Indicator parameters (2)
| Parameter | Value | Parametric value | Share of the parametric value | Reference |
|---|---|---|---|---|
| Iron | <0,029 mg/l below limit of quantification | 0.2 mg/l | < 15 % * | Single value · Wanna |
| pH | 8,09 | 6,5–9,5 | — | Single value · Wanna |
* 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 (3)
| Parameter | Value | Parametric value | Share of the parametric value | Reference |
|---|---|---|---|---|
| Calcium | 38,5 mg/l | — | — | Single value · Wanna |
| Hardness range (WRMG) | 2 | — | — | Single value · Wanna |
| Total hardness | 10,8 °dH | — | — | Single value · Wanna |
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 21775
- How hard is the water in Postcode 21775?
- Wasser- und Bodenverbände Otterndorf publishes a total hardness of 8.3 °dH for the supply zone Altenwalde (hardness range 1). 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 13/07/2026.
- How much nitrate is in the drinking water in Postcode 21775?
- Wasser- und Bodenverbände Otterndorf publishes a nitrate value of 9,5 mg/l for the supply zone Altenwalde. The statutory parametric value is 50 mg/l; the measured value represents 19 % of the parametric value. Basis: Publication by the water supplier, retrieved on 13/07/2026.
- Who supplies the drinking water in Postcode 21775?
- Wasser- und Bodenverbände Otterndorf. The values shown here come from the supply zone Altenwalde 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.