Drinking water in Santa Maria Maggiore
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.
HB Werder / MW Holterheide + Ristedt
OOWV (Oldenburgisch-Ostfriesischer Wasserverband) und Wasserversorgung Syker Vorgeest GmbHAssigned 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 |
|---|---|---|---|---|
| Nitrate | 12.6 mg/l | 50 mg/l | 25 % | Mean |
| Lead | <0.001 mg/l below limit of quantification | 10 µg/l | < 10 % * | Mean |
| Escherichia coli (E. coli) | 0 / 100 ml | 0/100 ml | — | Maximum · Median 0 |
| Sulphate | 55.3 mg/l | 250 mg/l | 22 % | Mean |
| Sodium | 0.753 mmol/l | 200 mg/l | — | Mean |
* 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 (65 — most recent value per parameter)
Microbiology (2)
| Parameter | Value | Parametric value | Share of the parametric value | Reference |
|---|---|---|---|---|
| Escherichia coli (E. coli) | 0 / 100 ml | 0/100 ml | — | Maximum · Median 0 |
| Intestinal enterococci | n.b. / 100 ml not determined | 0/100 ml | — | Maximum · Median n.b. |
Chemical parameters (29)
| 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 % * | Mean |
| 2,6-Dichlorobenzamide (BAM) | n.b. mg/l not determined | — | — | Mean |
| Antimony | <0.0005 mg/l below limit of quantification | 5 µg/l | < 10 % * | Mean |
| Arsenic | <0.0005 mg/l below limit of quantification | 10 µg/l | < 5 % * | Mean |
| Benzene | <0.0001 mg/l below limit of quantification | 1 µg/l | < 10 % * | Mean |
| Benzo(a)pyrene | n.b. mg/l not determined | 10 ng/l | — | Mean |
| Bisphenol A | n.b. mg/l not determined | 2.5 µg/l | — | Mean |
| Boron | <0.05 mg/l below limit of quantification | 1 mg/l | < 5 % * | Mean |
| Bromate | <0.01 mg/l below limit of quantification | 10 µg/l | < 100 % * | Mean |
| Cadmium | <0.001 mg/l below limit of quantification | 3 µg/l | < 33 % * | Mean |
| Chlorite | n.b. mg/l not determined | 0.2 mg/l | — | Mean |
| Chromium | <0.001 mg/l below limit of quantification | 25 µg/l | < 4 % * | Mean |
| Copper | <0.001 mg/l below limit of quantification | 2 mg/l | < < 0.1 % * | Mean |
| Cyanide | <0.001 mg/l below limit of quantification | 50 µg/l | < 2 % * | Mean |
| Dimethachlor sulfonic acid | n.b. mg/l not determined | — | — | Mean |
| Fluoride | 0.13 mg/l | 1.5 mg/l | 9 % | Mean |
| Lead | <0.001 mg/l below limit of quantification | 10 µg/l | < 10 % * | Mean |
| Mercury | <0.0001 mg/l below limit of quantification | 1 µg/l | < 10 % * | Mean |
| Metazachlor acid | n.b. mg/l not determined | — | — | Mean |
| Metazachlor sulfonic acid | n.b. mg/l not determined | — | — | Mean |
| Metolachlor acid | n.b. mg/l not determined | — | — | Mean |
| Metolachlor sulfonic acid | n.b. mg/l not determined | — | — | Mean |
| Nickel | 0.0030 mg/l | 20 µg/l | 15 % | Mean |
| Nitrate | 12.6 mg/l | 50 mg/l | 25 % | Mean |
| Nitrite | 0.002 mg/l | 0.5 mg/l | 0.4 % | Mean |
| Polycyclic aromatic hydrocarbons | n.b. mg/l not determined | 0.1 µg/l | — | Mean |
| Selenium | <0.0005 mg/l below limit of quantification | 10 µg/l | < 5 % * | Mean |
| Tetrachloromethane | <0.0001 mg/l below limit of quantification | — | — | Mean |
| Uranium | <0.0001 mg/l below limit of quantification | 10 µg/l | < 1 % * | Mean |
* 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 (1)
| Parameter | Value | Parametric value | Share of the parametric value | Reference |
|---|---|---|---|---|
| Trifluoroacetic acid (TFA) | n.b. mg/l not determined | 60 µg/l UBA guide value | — | Mean |
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.
Indicator parameters (19)
| Parameter | Value | Parametric value | Share of the parametric value | Reference |
|---|---|---|---|---|
| Aluminium | 0.002 mg/l | 0.2 mg/l | 1 % | Mean |
| Ammonium | <0.03 mg/l below limit of quantification | 0.5 mg/l | < 6 % * | Mean |
| Calcite dissolution capacity | n.b. mg/l not determined | 5 mg/l CaCO3 | — | Mean |
| Chloride | 29.3 mg/l | 250 mg/l | 12 % | Mean |
| Clostridium perfringens (including spores) | n.b. / 100 ml not determined | 0/100 ml | — | Maximum · Median n.b. |
| Coliform bacteria | 0 / 100 ml | 0/100 ml | — | Maximum · Median 0 |
| Colony count 22 °C | 0 /ml | ohne anormale Veränderung | — | Mean |
| Colony count 36 °C | 0 /ml | ohne anormale Veränderung | — | Mean |
| Colour | 0.05 /m | 0.5 m⁻¹ | — | Mean |
| Iron | 0.002 mg/l | 0.2 mg/l | 1 % | Mean |
| Manganese | <0.001 mg/l below limit of quantification | 50 µg/l | < 2 % * | Mean |
| pH | 8.29 | 6,5–9,5 | — | Mean |
| Sodium | 0.753 mmol/l | 200 mg/l | — | Mean |
| Sulphate | 55.3 mg/l | 250 mg/l | 22 % | Mean |
| Taste | ohne | für den Verbraucher annehmbar | — | Mean |
| Temperature | 11.1 °C | — | — | Mean |
| Threshold odour number (TON) | 1 | — | — | Mean |
| Total organic carbon (TOC) | 1.5 mg/l | ohne anormale Veränderung | — | Mean |
| Turbidity | 0.06 FTU | 1 NTU | — | Mean |
* 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 (2)
| Parameter | Value | Parametric value | Share of the parametric value | Reference |
|---|---|---|---|---|
| Chlorine dioxide | n.b. mg/l not determined | — | — | Mean |
| Total chlorine | <0.02 mg/l below limit of quantification | — | — | Mean |
Further parameters (12)
| Parameter | Value | Parametric value | Share of the parametric value | Reference |
|---|---|---|---|---|
| Barium | 0.04 mg/l | — | — | Mean |
| Calcium | 0.873 mmol/l | — | — | Mean |
| Carbonate hardness | 3.5 °dH | — | — | Mean |
| Hardness range (WRMG) | weich | — | — | Mean |
| Magnesium | 0.212 mmol/l | — | — | Mean |
| Oxygen | 11.6 mg/l | — | — | Mean |
| Phosphate | <0.005 mg/l below limit of quantification | — | — | Mean |
| Potassium | 0.100 mmol/l | — | — | Mean |
| Silicate / silicic acid | 8.3 mg/l | — | — | Mean |
| Sum of alkaline earth metals | 1.085 mmol/l | — | — | Mean |
| Total hardness | 6.1 °dH | — | — | Mean |
| Zinc | 0.004 mg/l | — | — | Mean |
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: 28857
Show 1 more supply zone
WW Ristedt / Reinwasser
OOWV (Oldenburgisch-Ostfriesischer Wasserverband) und Wasserversorgung Syker Vorgeest GmbHAssigned 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 |
|---|---|---|---|---|
| Nitrate | 1.7 mg/l | 50 mg/l | 3 % | Mean |
| Lead | <0.001 mg/l below limit of quantification | 10 µg/l | < 10 % * | Mean |
| Escherichia coli (E. coli) | 0 / 100 ml | 0/100 ml | — | Maximum · Median 0 |
| Sulphate | 69.2 mg/l | 250 mg/l | 28 % | Mean |
| Sodium | 0.813 mmol/l | 200 mg/l | — | Mean |
* 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 (65 — most recent value per parameter)
Microbiology (2)
| Parameter | Value | Parametric value | Share of the parametric value | Reference |
|---|---|---|---|---|
| Escherichia coli (E. coli) | 0 / 100 ml | 0/100 ml | — | Maximum · Median 0 |
| Intestinal enterococci | 0 / 100 ml | 0/100 ml | — | Maximum · Median 0 |
Chemical parameters (29)
| 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 % * | Mean |
| 2,6-Dichlorobenzamide (BAM) | <0.000025 mg/l below limit of quantification | — | — | Mean |
| Antimony | <0.0005 mg/l below limit of quantification | 5 µg/l | < 10 % * | Mean |
| Arsenic | <0.0005 mg/l below limit of quantification | 10 µg/l | < 5 % * | Mean |
| Benzene | <0.0001 mg/l below limit of quantification | 1 µg/l | < 10 % * | Mean |
| Benzo(a)pyrene | <0.00001 mg/l below limit of quantification | 10 ng/l | < 100 % * | Mean |
| Bisphenol A | <0.0001 mg/l below limit of quantification | 2.5 µg/l | < 4 % * | Mean |
| Boron | <0.05 mg/l below limit of quantification | 1 mg/l | < 5 % * | Mean |
| Bromate | <0.01 mg/l below limit of quantification | 10 µg/l | < 100 % * | Mean |
| Cadmium | <0.001 mg/l below limit of quantification | 3 µg/l | < 33 % * | Mean |
| Chlorite | n.b. mg/l not determined | 0.2 mg/l | — | Mean |
| Chromium | <0.001 mg/l below limit of quantification | 25 µg/l | < 4 % * | Mean |
| Copper | 0.0021 mg/l | 2 mg/l | 0.1 % | Mean |
| Cyanide | <0.001 mg/l below limit of quantification | 50 µg/l | < 2 % * | Mean |
| Dimethachlor sulfonic acid | <0.000025 mg/l below limit of quantification | — | — | Mean |
| Fluoride | 0.19 mg/l | 1.5 mg/l | 13 % | Mean |
| Lead | <0.001 mg/l below limit of quantification | 10 µg/l | < 10 % * | Mean |
| Mercury | <0.0001 mg/l below limit of quantification | 1 µg/l | < 10 % * | Mean |
| Metazachlor acid | 0.000182 mg/l | — | — | Mean |
| Metazachlor sulfonic acid | 0.000249 mg/l | — | — | Mean |
| Metolachlor acid | 0.000172 mg/l | — | — | Mean |
| Metolachlor sulfonic acid | 0.000062 mg/l | — | — | Mean |
| Nickel | <0.001 mg/l below limit of quantification | 20 µg/l | < 5 % * | Mean |
| Nitrate | 1.7 mg/l | 50 mg/l | 3 % | Mean |
| Nitrite | 0.002 mg/l | 0.5 mg/l | 0.4 % | Mean |
| Polycyclic aromatic hydrocarbons | <0.0001 mg/l below limit of quantification | 0.1 µg/l | < 100 % * | Mean |
| Selenium | <0.0005 mg/l below limit of quantification | 10 µg/l | < 5 % * | Mean |
| Tetrachloromethane | <0.0001 mg/l below limit of quantification | — | — | Mean |
| Uranium | <0.0001 mg/l below limit of quantification | 10 µg/l | < 1 % * | Mean |
* 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 (1)
| Parameter | Value | Parametric value | Share of the parametric value | Reference |
|---|---|---|---|---|
| Trifluoroacetic acid (TFA) | 0.000854 mg/l | 60 µg/l UBA guide value | 1 % | Mean |
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.
Indicator parameters (19)
| Parameter | Value | Parametric value | Share of the parametric value | Reference |
|---|---|---|---|---|
| Aluminium | 0.002 mg/l | 0.2 mg/l | 1 % | Mean |
| Ammonium | <0.03 mg/l below limit of quantification | 0.5 mg/l | < 6 % * | Mean |
| Calcite dissolution capacity | 1.9 mg/l | 5 mg/l CaCO3 | — | Mean |
| Chloride | 29.8 mg/l | 250 mg/l | 12 % | Mean |
| Clostridium perfringens (including spores) | n.b. / 100 ml not determined | 0/100 ml | — | Maximum · Median n.b. |
| Coliform bacteria | 0 / 100 ml | 0/100 ml | — | Maximum · Median 0 |
| Colony count 22 °C | 0 /ml | ohne anormale Veränderung | — | Mean |
| Colony count 36 °C | 0 /ml | ohne anormale Veränderung | — | Mean |
| Colour | 0.09 /m | 0.5 m⁻¹ | — | Mean |
| Iron | 0.003 mg/l | 0.2 mg/l | 2 % | Mean |
| Manganese | <0.001 mg/l below limit of quantification | 50 µg/l | < 2 % * | Mean |
| pH | 7.74 | 6,5–9,5 | — | Mean |
| Sodium | 0.813 mmol/l | 200 mg/l | — | Mean |
| Sulphate | 69.2 mg/l | 250 mg/l | 28 % | Mean |
| Taste | ohne | für den Verbraucher annehmbar | — | Mean |
| Temperature | 11.7 °C | — | — | Mean |
| Threshold odour number (TON) | 1 | — | — | Mean |
| Total organic carbon (TOC) | 2.1 mg/l | ohne anormale Veränderung | — | Mean |
| Turbidity | 0.07 FTU | 1 NTU | — | Mean |
* 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 (2)
| Parameter | Value | Parametric value | Share of the parametric value | Reference |
|---|---|---|---|---|
| Chlorine dioxide | n.b. mg/l not determined | — | — | Mean |
| Total chlorine | n.b. mg/l not determined | — | — | Mean |
Further parameters (12)
| Parameter | Value | Parametric value | Share of the parametric value | Reference |
|---|---|---|---|---|
| Barium | 0.03 mg/l | — | — | Mean |
| Calcium | 1.069 mmol/l | — | — | Mean |
| Carbonate hardness | 4.6 °dH | — | — | Mean |
| Hardness range (WRMG) | weich | — | — | Mean |
| Magnesium | 0.188 mmol/l | — | — | Mean |
| Oxygen | 10.9 mg/l | — | — | Mean |
| Phosphate | <0.005 mg/l below limit of quantification | — | — | Mean |
| Potassium | 0.141 mmol/l | — | — | Mean |
| Silicate / silicic acid | 9.5 mg/l | — | — | Mean |
| Sum of alkaline earth metals | 1.257 mmol/l | — | — | Mean |
| Total hardness | 7.0 °dH | — | — | Mean |
| Zinc | 0.001 mg/l | — | — | Mean |
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: 28857
Frequently asked questions about drinking water in Santa Maria Maggiore
- How hard is the water in Santa Maria Maggiore?
- OOWV (Oldenburgisch-Ostfriesischer Wasserverband) und Wasserversorgung Syker Vorgeest GmbH publishes a total hardness of 6.1 °dH for the supply zone HB Werder / MW Holterheide + Ristedt (hardness range weich). 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 Santa Maria Maggiore?
- OOWV (Oldenburgisch-Ostfriesischer Wasserverband) und Wasserversorgung Syker Vorgeest GmbH publishes a nitrate value of 12.6 mg/l for the supply zone HB Werder / MW Holterheide + Ristedt. The statutory parametric value is 50 mg/l; the measured value represents 25 % of the parametric value. Basis: Publication by the water supplier, retrieved on 11/07/2026.
- Who supplies the drinking water in Santa Maria Maggiore?
- OOWV (Oldenburgisch-Ostfriesischer Wasserverband) und Wasserversorgung Syker Vorgeest GmbH. The values shown here come from the supply zone HB Werder / MW Holterheide + Ristedt 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.