Drinking water in Dortmund (Schüren, Benninghofen
One supply zone, water supplier: DEW21 – Dortmunder Energie- und Wasserversorgung GmbH.
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.
Wasserwerk Witten
DEW21 – Dortmunder Energie- und Wasserversorgung GmbHWater hardness
7 °dH
Hardness range weich
| Parameter | Value | Parametric value | Share of the parametric value | Reference |
|---|---|---|---|---|
| Sum of PFAS | 0,0304 µg/l | 0.1 µg/l | 30 % | Mean · 2026/1 · Source [6] |
| Nitrate | 12,7 mg/l | 50 mg/l | 25 % | Mean · Quartalsmittel 2026/1 · Source [3] |
| Lead | <1 µg/l below limit of quantification | 10 µg/l | < 10 % * | Mean · Quartalsmittel 2026/1 · Source [3] |
| Escherichia coli (E. coli) | 0 KBE/100 ml | 0/100 ml | — | Mean · Quartals-Mittel 2026/1 · Source [5] |
| Sulphate | 32 mg/l | 250 mg/l | 13 % | Mean · Quartalsmittel 2026/1 · Source [3] |
| Sodium | 29 mg/l | 200 mg/l | 14 % | Mean · Quartalsmittel 2026/1 · Source [3] |
* 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 (186 — most recent value per parameter)
Microbiology (2)
| Parameter | Value | Parametric value | Share of the parametric value | Reference |
|---|---|---|---|---|
| Escherichia coli (E. coli) | 0 KBE/100 ml | 0/100 ml | — | Mean · Quartals-Mittel 2026/1 · Source [5] |
| Intestinal enterococci | 0 KBE/100 ml | 0/100 ml | — | Mean · Quartals-Mittel 2026/1 · Source [5] |
Chemical parameters (94)
| Parameter | Value | Parametric value | Share of the parametric value | Reference |
|---|---|---|---|---|
| 1,1,1-Trichloroethane | <0,1 µg/l below limit of quantification | — | — | Mean · 2026/1 · Source [1] |
| 1,2-dichloroethane | <0,1 µg/l below limit of quantification | 3 µg/l | < 3 % * | Mean · 2026/1 · Source [1] |
| 2,4-D | <0,025 µg/l below limit of quantification | — | — | Mean · 2026/1 · Source [2] |
| 2,6-Dichlorobenzamide (BAM) | <0,025 µg/l below limit of quantification | — | — | Mean · 2026/1 · Source [4] |
| Acrylamide | <0,01 µg/l below limit of quantification | 0.1 µg/l | < 10 % * | Mean · 2025 · Source [1] |
| Aldrin | <0,015 µg/l below limit of quantification | 30 ng/l | < 50 % * | Mean · 2026/1 · Source [2] |
| AMPA | <0,020 µg/l below limit of quantification | — | — | Mean · 2026/1 · Source [4] |
| Antimony | <1,0 µg/l below limit of quantification | 5 µg/l | < 20 % * | Mean · Quartalsmittel 2026/1 · Source [3] |
| Arsenic | <0,5 µg/l below limit of quantification | 10 µg/l | < 5 % * | Mean · Quartalsmittel 2026/1 · Source [3] |
| Atrazine | <0,025 µg/l below limit of quantification | — | — | Mean · 2026/1 · Source [2] |
| Bentazone | <0,050 µg/l below limit of quantification | — | — | Mean · 2026/1 · Source [4] |
| Benzene | <0,1 µg/l below limit of quantification | 1 µg/l | < 10 % * | Mean · 2026/1 · Source [1] |
| Benzo(a)pyrene | <0,0025 µg/l below limit of quantification | 10 ng/l | < 25 % * | Mean · 2026/1 · Source [1] |
| Benzo(b)fluoranthene | <0,0100 µg/l below limit of quantification | — | — | Mean · 2026/1 · Source [1] |
| Benzo(ghi)perylene | <0,0050 µg/l below limit of quantification | — | — | Mean · 2026/1 · Source [1] |
| Benzo(k)fluoranthene | <0,0050 µg/l below limit of quantification | — | — | Mean · 2026/1 · Source [1] |
| Bisphenol A | <0,015 µg/l below limit of quantification | 2.5 µg/l | < 0.6 % * | Mean · 2026/1 · Source [1] |
| Boron | <0,05 mg/l below limit of quantification | 1 mg/l | < 5 % * | Mean · Quartalsmittel 2026/1 · Source [3] |
| Bromacil | <0,025 µg/l below limit of quantification | — | — | Mean · 2026/1 · Source [2] |
| Bromate | <0,0030 mg/l below limit of quantification | 10 µg/l | < 30 % * | Mean · Quartalsmittel 2026/1 · Source [3] |
| Bromodichloromethane | <0,1 µg/l below limit of quantification | — | — | Mean · 2026/1 · Source [1] |
| Bromoxynil | <0,025 µg/l below limit of quantification | — | — | Mean · 2026/1 · Source [2] |
| Cadmium | <0,3 µg/l below limit of quantification | 3 µg/l | < 10 % * | Mean · Quartalsmittel 2026/1 · Source [3] |
| Carbendazim | <0,025 µg/l below limit of quantification | — | — | Mean · 2026/1 · Source [2] |
| Carbetamide | <0,025 µg/l below limit of quantification | — | — | Mean · 2026/1 · Source [2] |
| Chlorate | <0,00 mg/l below limit of quantification | 70 µg/l | < 0 % * | Mean · Quartalsmittel 2026/1 · Source [3] |
| Chloridazon | <0,025 µg/l below limit of quantification | — | — | Mean · 2026/1 · Source [2] |
| Chlorite | <0,01 mg/l below limit of quantification | 0.2 mg/l | < 5 % * | Mean · Quartalsmittel 2026/1 · Source [3] |
| Chlorotoluron | <0,025 µg/l below limit of quantification | — | — | Mean · 2026/1 · Source [2] |
| Chromium | <0,4 µg/l below limit of quantification | 25 µg/l | < 2 % * | Mean · Quartalsmittel 2026/1 · Source [3] |
| cis-1,2-Dichloroethene | <0,1 µg/l below limit of quantification | — | — | Mean · 2026/1 · Source [1] |
| Clopyralid | <0,050 µg/l below limit of quantification | — | — | Mean · 2026/1 · Source [2] |
| Copper | <5 µg/l below limit of quantification | 2 mg/l | < 0.3 % * | Mean · Quartalsmittel 2026/1 · Source [3] |
| Cyanide | <0,005 mg/l below limit of quantification | 50 µg/l | < 10 % * | Mean · Quartalsmittel 2026/1 · Source [3] |
| Desethylatrazine | <0,025 µg/l below limit of quantification | — | — | Mean · 2026/1 · Source [4] |
| Desisopropylatrazine | <0,025 µg/l below limit of quantification | — | — | Mean · 2026/1 · Source [4] |
| Dibromochloromethane | <0,1 µg/l below limit of quantification | — | — | Mean · 2026/1 · Source [1] |
| Dicamba | <0,050 µg/l below limit of quantification | — | — | Mean · 2026/1 · Source [2] |
| Dichloromethane | <0,1 µg/l below limit of quantification | — | — | Mean · 2026/1 · Source [1] |
| Dichlorprop | <0,025 µg/l below limit of quantification | — | — | Mean · 2026/1 · Source [2] |
| Dieldrin | <0,015 µg/l below limit of quantification | 30 ng/l | < 50 % * | Mean · 2026/1 · Source [2] |
| Dimefuron | <0,025 µg/l below limit of quantification | — | — | Mean · 2026/1 · Source [2] |
| Dimethachlor | <0,050 µg/l below limit of quantification | — | — | Mean · 2026/1 · Source [4] |
| Dimethenamid | <0,050 µg/l below limit of quantification | — | — | Mean · 2026/1 · Source [4] |
| Diuron | <0,025 µg/l below limit of quantification | — | — | Mean · 2026/1 · Source [2] |
| Epichlorohydrin | <0,1 µg/l below limit of quantification | 0.1 µg/l | < 100 % * | Mean · 2025 · Source [1] |
| ETBE | <0,05 µg/l below limit of quantification | — | — | Mean · 2026/1 · Source [1] |
| Ethidimuron | <0,025 µg/l below limit of quantification | — | — | Mean · 2026/1 · Source [2] |
| Ethofumesate | <0,050 µg/l below limit of quantification | — | — | Mean · 2026/1 · Source [2] |
| Flufenacet | <0,050 µg/l below limit of quantification | — | — | Mean · 2026/1 · Source [4] |
| Fluoranthene | <0,0100 µg/l below limit of quantification | — | — | Mean · 2026/1 · Source [1] |
| Fluoride | 0,08 mg/l | 1.5 mg/l | 5 % | Mean · Quartalsmittel 2026/1 · Source [3] |
| Glyphosate | <0,020 µg/l below limit of quantification | — | — | Mean · 2026/1 · Source [2] |
| Heptachlor | <0,015 µg/l below limit of quantification | 30 ng/l | < 50 % * | Mean · 2026/1 · Source [2] |
| Hexazinone | <0,025 µg/l below limit of quantification | — | — | Mean · 2026/1 · Source [2] |
| Imidacloprid | <0,025 µg/l below limit of quantification | — | — | Mean · 2026/1 · Source [2] |
| Isoproturon | <0,025 µg/l below limit of quantification | — | — | Mean · 2026/1 · Source [2] |
| Lead | <1 µg/l below limit of quantification | 10 µg/l | < 10 % * | Mean · Quartalsmittel 2026/1 · Source [3] |
| MCPA | <0,025 µg/l below limit of quantification | — | — | Mean · 2026/1 · Source [2] |
| Mecoprop | <0,025 µg/l below limit of quantification | — | — | Mean · 2026/1 · Source [2] |
| Mercury | <0,10 µg/l below limit of quantification | 1 µg/l | < 10 % * | Mean · Quartalsmittel 2026/1 · Source [3] |
| Metalaxyl | <0,025 µg/l below limit of quantification | — | — | Mean · 2026/1 · Source [2] |
| Metamitron | <0,025 µg/l below limit of quantification | — | — | Mean · 2026/1 · Source [2] |
| Metazachlor | <0,050 µg/l below limit of quantification | — | — | Mean · 2026/1 · Source [4] |
| Methabenzthiazuron | <0,025 µg/l below limit of quantification | — | — | Mean · 2026/1 · Source [2] |
| Metobromuron | <0,025 µg/l below limit of quantification | — | — | Mean · 2026/1 · Source [7] |
| Metolachlor | <0,050 µg/l below limit of quantification | — | — | Mean · 2026/1 · Source [4] |
| Metribuzin | <0,025 µg/l below limit of quantification | — | — | Mean · 2026/1 · Source [7] |
| MTBE | <0,05 µg/l below limit of quantification | — | — | Mean · 2026/1 · Source [1] |
| Nickel | <2 µg/l below limit of quantification | 20 µg/l | < 10 % * | Mean · Quartalsmittel 2026/1 · Source [3] |
| Nicosulfuron | <0,025 µg/l below limit of quantification | — | — | Mean · 2026/1 · Source [7] |
| Nitrate | 12,7 mg/l | 50 mg/l | 25 % | Mean · Quartalsmittel 2026/1 · Source [3] |
| Nitrite | 0,01 mg/l | 0.5 mg/l | 2 % | Mean · Quartalsmittel 2026/1 · Source [3] |
| Pendimethalin | <0,025 µg/l below limit of quantification | — | — | Mean · 2026/1 · Source [7] |
| Pesticides — Total | <0,025 µg/l below limit of quantification | 0.5 µg/l | < 5 % * | Mean · 2026/1 · Source [7] |
| Polycyclic aromatic hydrocarbons | <0,0050 µg/l below limit of quantification | 0.1 µg/l | < 5 % * | Mean · 2026/1 · Source [1] |
| Prosulfocarb | <0,025 µg/l below limit of quantification | — | — | Mean · 2026/1 · Source [7] |
| Quinmerac | <0,050 µg/l below limit of quantification | — | — | Mean · 2026/1 · Source [4] |
| Selenium | <1,0 µg/l below limit of quantification | 10 µg/l | < 10 % * | Mean · Quartalsmittel 2026/1 · Source [3] |
| Simazine | <0,025 µg/l below limit of quantification | — | — | Mean · 2026/1 · Source [7] |
| Tebuconazole | <0,050 µg/l below limit of quantification | — | — | Mean · 2026/1 · Source [7] |
| Terbuthylazine | <0,025 µg/l below limit of quantification | — | — | Mean · 2026/1 · Source [2] |
| Terbutryn | <0,025 µg/l below limit of quantification | — | — | Mean · 2026/1 · Source [2] |
| Tetrachloroethene | <0,1 µg/l below limit of quantification | — | — | Mean · 2026/1 · Source [6] |
| Tetrachloroethene and Trichloroethene (sum) | <0,1 µg/l below limit of quantification | 10 µg/l | < 1 % * | Mean · 2026/1 · Source [1] |
| Tetrachloromethane | <0,05 µg/l below limit of quantification | — | — | Mean · 2026/1 · Source [6] |
| Thiacloprid | <0,025 µg/l below limit of quantification | — | — | Mean · 2026/1 · Source [2] |
| Tri-allate | <0,050 µg/l below limit of quantification | — | — | Mean · 2026/1 · Source [2] |
| Tribromomethane (bromoform) | <0,1 µg/l below limit of quantification | — | — | Mean · 2026/1 · Source [1] |
| Trichloroethene | <0,1 µg/l below limit of quantification | — | — | Mean · 2026/1 · Source [6] |
| Trichloromethane (chloroform) | <0,1 µg/l below limit of quantification | — | — | Mean · 2026/1 · Source [1] |
| Trihalomethanes — Total | <0,1 µg/l below limit of quantification | 50 µg/l | < 0.2 % * | Mean · 2026/1 · Source [1] |
| Uranium | <1 µg/l below limit of quantification | 10 µg/l | < 10 % * | Mean · Quartalsmittel 2026/1 · Source [3] |
| Vinyl chloride | <0,05 µg/l below limit of quantification | 0.5 µg/l | < 10 % * | Mean · 2026/1 · Source [6] |
* 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 (23)
| Parameter | Value | Parametric value | Share of the parametric value | Reference |
|---|---|---|---|---|
| HFPO-DA (GenX) | <0,0100 µg/l below limit of quantification | — | — | Mean · 2026/1 · Source [6] |
| Perfluorobutane sulfonic acid (PFBS) | 0,0022 µg/l | — | — | Mean · 2026/1 · Source [1] |
| Perfluorobutanoic acid (PFBA) | 0,0036 µg/l | — | — | Mean · 2026/1 · Source [1] |
| Perfluorodecane sulfonic acid (PFDS) | <0,0010 µg/l below limit of quantification | — | — | Mean · 2026/1 · Source [1] |
| Perfluorodecanoic acid (PFDA) | <0,0010 µg/l below limit of quantification | — | — | Mean · 2026/1 · Source [1] |
| Perfluorododecane sulfonic acid (PFDoDS) | <0,0010 µg/l below limit of quantification | — | — | Mean · 2026/1 · Source [1] |
| Perfluorododecanoic acid (PFDoDA) | <0,0010 µg/l below limit of quantification | — | — | Mean · 2026/1 · Source [1] |
| Perfluoroheptane sulfonic acid (PFHpS) | <0,0010 µg/l below limit of quantification | — | — | Mean · 2026/1 · Source [1] |
| Perfluoroheptanoic acid (PFHpA) | 0,006 µg/l | — | — | Mean · 2026/1 · Source [1] |
| Perfluorohexane sulfonic acid (PFHxS) | <0,0010 µg/l below limit of quantification | — | — | Mean · 2026/1 · Source [1] |
| Perfluorohexanoic acid (PFHxA) | 0,0051 µg/l | — | — | Mean · 2026/1 · Source [1] |
| Perfluorononane sulfonic acid (PFNS) | <0,0010 µg/l below limit of quantification | — | — | Mean · 2026/1 · Source [1] |
| Perfluorononanoic acid (PFNA) | <0,0010 µg/l below limit of quantification | — | — | Mean · 2026/1 · Source [1] |
| Perfluorooctanesulfonic acid (PFOS) | 0,0024 µg/l | — | — | Mean · 2026/1 · Source [1] |
| Perfluorooctanoic acid (PFOA) | 0,0047 µg/l | — | — | Mean · 2026/1 · Source [1] |
| Perfluoropentanesulfonic acid (PFPeS) | <0,0010 µg/l below limit of quantification | — | — | Mean · 2026/1 · Source [1] |
| Perfluoropentanoic acid (PFPeA) | 0,0064 µg/l | — | — | Mean · 2026/1 · Source [1] |
| Perfluorotridecanesulfonic acid (PFTrDS) | <0,0010 µg/l below limit of quantification | — | — | Mean · 2026/1 · Source [1] |
| Perfluorotridecanoic acid (PFTrDA) | <0,0010 µg/l below limit of quantification | — | — | Mean · 2026/1 · Source [1] |
| Perfluoroundecanesulfonic acid (PFUnDS) | <0,0010 µg/l below limit of quantification | — | — | Mean · 2026/1 · Source [1] |
| Perfluoroundecanoic acid (PFUnDA) | <0,0010 µg/l below limit of quantification | — | — | Mean · 2026/1 · Source [1] |
| Sum of 4 PFAS | 0,0071 µg/l | — | — | Mean · 2026/1 · Source [6] |
| Sum of PFAS | 0,0304 µg/l | 0.1 µg/l | 30 % | Mean · 2026/1 · Source [6] |
Indicator parameters (19)
| Parameter | Value | Parametric value | Share of the parametric value | Reference |
|---|---|---|---|---|
| Aluminium | <10 µg/l below limit of quantification | 0.2 mg/l | < 5 % * | Mean · Quartalsmittel 2026/1 · Source [3] |
| Ammonium | <0,05 mg/l below limit of quantification | 0.5 mg/l | < 10 % * | Mean · Quartalsmittel 2026/1 · Source [3] |
| Chloride | 50 mg/l | 250 mg/l | 20 % | Mean · Quartalsmittel 2026/1 · Source [3] |
| Clostridium perfringens (including spores) | 0 KBE/100 ml | 0/100 ml | — | Mean · Quartals-Mittel 2026/1 · Source [5] |
| Coliform bacteria | 0 KBE/100 ml | 0/100 ml | — | Mean · Quartals-Mittel 2026/1 · Source [5] |
| Colony count 22 °C | 0 KBE/ml | ohne anormale Veränderung | — | Mean · Quartals-Mittel 2026/1 · Source [5] |
| Colony count 36 °C | 0 KBE/ml | ohne anormale Veränderung | — | Mean · Quartals-Mittel 2026/1 · Source [5] |
| Colour | <0,10 1/m below limit of quantification | 0.5 m⁻¹ | — | Mean · Quartalsmittel 2026/1 · Source [3] |
| Conductivity (25 °C) | 382 µS/cm | 2,790 µS/cm | — | Mean · Quartalsmittel 2026/1 · Source [3] |
| Iron | <0,010 mg/l below limit of quantification | 0.2 mg/l | < 5 % * | Mean · Quartalsmittel 2026/1 · Source [3] |
| Manganese | <0,002 mg/l below limit of quantification | 50 µg/l | < 4 % * | Mean · Quartalsmittel 2026/1 · Source [3] |
| Odour | unauffällig | für den Verbraucher annehmbar | — | Mean · Quartalsmittel 2026/1 · Source [3] |
| pH | 7,9 | 6,5–9,5 | — | Mean · Quartalsmittel 2026/1 · Source [3] |
| Sodium | 29 mg/l | 200 mg/l | 14 % | Mean · Quartalsmittel 2026/1 · Source [3] |
| Sulphate | 32 mg/l | 250 mg/l | 13 % | Mean · Quartalsmittel 2026/1 · Source [3] |
| Taste | unauffällig | für den Verbraucher annehmbar | — | Mean · Quartalsmittel 2026/1 · Source [3] |
| Temperature | 6,6 °C | — | — | Mean · Quartalsmittel 2026/1 · Source [3] |
| Total organic carbon (TOC) | 0,9 mg/l | ohne anormale Veränderung | — | Mean · Quartalsmittel 2026/1 · Source [3] |
| Turbidity | <0,05 FNU below limit of quantification | 1 NTU | — | Mean · Quartalsmittel 2026/1 · Source [3] |
* 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 (48)
| Parameter | Value | Parametric value | Share of the parametric value | Reference |
|---|---|---|---|---|
| Acid capacity to pH 4.3 | 1,66 mmol/l | — | — | Mean · Quartalsmittel 2026/1 · Source [3] |
| Amidotrizoic acid | 0,12 µg/l | — | — | Mean · 2026/1 · Source [4] |
| Atenolol | <0,025 µg/l below limit of quantification | — | — | Mean · 2026/1 · Source [4] |
| Barium | 23 µg/l | — | — | Mean · Quartalsmittel 2026/1 · Source [3] |
| Base capacity to pH 8.2 | 0,04 mmol/l | — | — | Mean · Quartalsmittel 2026/1 · Source [3] |
| Bezafibrate | <0,025 µg/l below limit of quantification | — | — | Mean · 2026/1 · Source [4] |
| Bromide | <0,05 mg/l below limit of quantification | — | — | Mean · Quartalsmittel 2026/1 · Source [3] |
| Calcium | 39 mg/l | — | — | Mean · Quartalsmittel 2026/1 · Source [3] |
| Candesartan | <0,050 µg/l below limit of quantification | — | — | Mean · 2026/1 · Source [4] |
| Carbamazepine | <0,025 µg/l below limit of quantification | — | — | Mean · 2026/1 · Source [4] |
| Carbonate hardness | 4,7 °dH | — | — | Mean · Quartalsmittel 2026/1 · Source [3] |
| Clarithromycin | <0,025 µg/l below limit of quantification | — | — | Mean · 2026/1 · Source [4] |
| Clofibric acid | <0,050 µg/l below limit of quantification | — | — | Mean · 2026/1 · Source [4] |
| Diclofenac | <0,050 µg/l below limit of quantification | — | — | Mean · 2026/1 · Source [4] |
| Dissolved organic carbon (DOC) | 0,8 mg/l | — | — | Mean · Quartalsmittel 2026/1 · Source [3] |
| EDTA | <1,0 µg/l below limit of quantification | — | — | Mean · 2025 · Source [1] |
| Erythromycin | <0,025 µg/l below limit of quantification | — | — | Mean · 2026/1 · Source [4] |
| Gabapentin | <0,050 µg/l below limit of quantification | — | — | Mean · 2026/1 · Source [4] |
| Hardness range (WRMG) | weich | — | — | Mean · Quartalsmittel 2026/1 · Source [3] |
| Iomeprol | <0,05 µg/l below limit of quantification | — | — | Mean · 2026/1 · Source [4] |
| Iopamidol | 0,06 µg/l | — | — | Mean · 2026/1 · Source [4] |
| Iopromide | <0,05 µg/l below limit of quantification | — | — | Mean · 2026/1 · Source [4] |
| Lamotrigine | <0,05 µg/l below limit of quantification | — | — | Mean · 2026/1 · Source [4] |
| Lithium | <5 µg/l below limit of quantification | — | — | Mean · Quartalsmittel 2026/1 · Source [3] |
| Magnesium | 6,8 mg/l | — | — | Mean · Quartalsmittel 2026/1 · Source [3] |
| Metformin | <0,050 µg/l below limit of quantification | — | — | Mean · 2026/1 · Source [4] |
| Metoprolol | <0,025 µg/l below limit of quantification | — | — | Mean · 2026/1 · Source [4] |
| NTA (nitrilotriacetic acid) | <1,0 µg/l below limit of quantification | — | — | Mean · 2025 · Source [1] |
| Olmesartan | <0,050 µg/l below limit of quantification | — | — | Mean · 2026/1 · Source [4] |
| Oxipurinol | <0,050 µg/l below limit of quantification | — | — | Mean · 2026/1 · Source [8] |
| Oxygen | 13,7 mg/l | — | — | Mean · Quartalsmittel 2026/1 · Source [3] |
| Phenazone | <0,025 µg/l below limit of quantification | — | — | Mean · 2026/1 · Source [4] |
| Phosphate | 0,15 mg/l | — | — | Mean · Quartalsmittel 2026/1 · Source [3] |
| Potassium | 3 mg/l | — | — | Mean · Quartalsmittel 2026/1 · Source [3] |
| Primidone | <0,050 µg/l below limit of quantification | — | — | Mean · 2026/1 · Source [4] |
| Propranolol | <0,025 µg/l below limit of quantification | — | — | Mean · 2026/1 · Source [4] |
| Silicate / silicic acid | 2100 µg/l | — | — | Mean · Quartalsmittel 2026/1 · Source [3] |
| Sotalol | <0,025 µg/l below limit of quantification | — | — | Mean · 2026/1 · Source [4] |
| Strontium | 0,12 mg/l | — | — | Mean · Quartalsmittel 2026/1 · Source [3] |
| Sulfamethoxazole | <0,050 µg/l below limit of quantification | — | — | Mean · 2026/1 · Source [4] |
| Total hardness | 7 °dH | — | — | Mean · Quartalsmittel 2026/1 · Source [3] |
| Trimethoprim | <0,025 µg/l below limit of quantification | — | — | Mean · 2026/1 · Source [4] |
| Triphenyl phosphate | <0,050 µg/l below limit of quantification | — | — | Mean · 2026/1 · Source [6] |
| Valsartan | <0,050 µg/l below limit of quantification | — | — | Mean · 2026/1 · Source [4] |
| Valsartanic acid | <0,050 µg/l below limit of quantification | — | — | Mean · 2026/1 · Source [8] |
| Vanadium | <0,5 µg/l below limit of quantification | — | — | Mean · Quartalsmittel 2026/1 · Source [3] |
| Venlafaxine | <0,025 µg/l below limit of quantification | — | — | Mean · 2026/1 · Source [4] |
| Zinc | <5 µg/l below limit of quantification | — | — | Mean · Quartalsmittel 2026/1 · Source [3] |
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.
Sources: [1] nrw-dew21-dortmunder-energie-und-wasserversorgung-a6bf433arf.html · Jahres-Mittel 2025 und Quartals-Mittel 2026/1 · retrieved on 11/07/2026 [2] nrw-dew21-dortmunder-energie-und-wasserversorgung-a6bf433arb.html · Jahres-Mittel 2025 / Quartals-Mittel 2026/1 · retrieved on 11/07/2026 [3] nrw-dew21-dortmunder-energie-und-wasserversorgung-a6bf433ara.html · Jahresmittel 2025 / Quartalsmittel 2026/1 · retrieved on 11/07/2026 [4] nrw-dew21-dortmunder-energie-und-wasserversorgung-a6bf433ard.html · Jahres-Mittel 2025 und Quartals-Mittel 2026/1 · retrieved on 11/07/2026 [5] nrw-dew21-dortmunder-energie-und-wasserversorgung-a6bf433arh.html · Jahres-Mittel 2025 / Quartals-Mittel 2026/1 · retrieved on 11/07/2026 [6] nrw-dew21-dortmunder-energie-und-wasserversorgung-a6bf433arg.html · Jahres-Mittel 2025 und Quartals-Mittel 2026/1 · retrieved on 11/07/2026 [7] nrw-dew21-dortmunder-energie-und-wasserversorgung-a6bf433arc.html · Jahres-Mittel 2025 / Quartals-Mittel 2026/1 · retrieved on 11/07/2026 [8] nrw-dew21-dortmunder-energie-und-wasserversorgung-a6bf433are.html · Jahresmittel 2025 und Quartalsmittel 2026/1 · retrieved on 11/07/2026
Postcodes in this zone: 44269
Frequently asked questions about drinking water in Dortmund (Schüren, Benninghofen
- How hard is the water in Dortmund (Schüren, Benninghofen?
- DEW21 – Dortmunder Energie- und Wasserversorgung GmbH publishes a total hardness of 7 °dH for the supply zone Wasserwerk Witten (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 Dortmund (Schüren, Benninghofen?
- DEW21 – Dortmunder Energie- und Wasserversorgung GmbH publishes a nitrate value of 12,7 mg/l for the supply zone Wasserwerk Witten. 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.
- Are PFAS detectable in the drinking water in Dortmund (Schüren, Benninghofen?
- DEW21 – Dortmunder Energie- und Wasserversorgung GmbH publishes for the supply zone Wasserwerk Witten a sum value PFAS-20 of 0,0304 µg/l. The statutory parametric value is 0.1 µg/l; the measured value represents 30 % of the parametric value. For the sum of the 20 individual substances, this parametric value has applied since 12/01/2026. Basis: Publication by the water supplier, retrieved on 11/07/2026.
- Who supplies the drinking water in Dortmund (Schüren, Benninghofen?
- DEW21 – Dortmunder Energie- und Wasserversorgung GmbH. The values shown here come from the supply zone Wasserwerk Witten 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.