Drinking water in Grenzach-Wyhlen
One supply zone, water supplier: Eigenbetrieb Wasserversorgung Grenzach-Wyhlen.
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.
Hochbehälter 4, Grenzach-Wyhlen
Eigenbetrieb Wasserversorgung Grenzach-WyhlenAssigned via the water supplier — the exact supply zone boundary within the postcode is not yet linked.
Water hardness
Hardness range 12,9
| Parameter | Value | Parametric value | Share of the parametric value | Reference |
|---|---|---|---|---|
| Sum of PFAS | 0,017 µg/L | 0.1 µg/l | 17 % | Single value |
| Nitrate | 7,9 mg/L | 50 mg/l | 16 % | Single value |
| Lead | < BG mg/L below limit of quantification | 10 µg/l | < 10 % * | Single value |
| Sulphate | 42,5 mg/L | 250 mg/l | 17 % | Single value |
| Sodium | 15,6 mg/L | 200 mg/l | 8 % | 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 (90 — most recent value per parameter)
Chemical parameters (65)
| Parameter | Value | Parametric value | Share of the parametric value | Reference |
|---|---|---|---|---|
| 1,1,1-Trichloroethane | < BG µg/L below limit of quantification | — | — | Single value |
| 1,2-dichloroethane | < BG µg/L below limit of quantification | 3 µg/l | < 3 % * | Single value |
| 2,6-Dichlorobenzamide (BAM) | < BG µg/L below limit of quantification | — | — | Single value |
| Antimony | < BG mg/L below limit of quantification | 5 µg/l | < 20 % * | Single value |
| Arsenic | 0,001 mg/L | 10 µg/l | 10 % | Single value |
| Atrazine | < BG µg/L below limit of quantification | — | — | Single value |
| Benzene | < BG µg/L below limit of quantification | 1 µg/l | < 10 % * | Single value |
| Benzo(a)pyrene | < BG µg/L below limit of quantification | 10 ng/l | < 20 % * | Single value |
| Benzo(b)fluoranthene | < BG µg/L below limit of quantification | — | — | Single value |
| Benzo(ghi)perylene | < BG µg/L below limit of quantification | — | — | Single value |
| Benzo(k)fluoranthene | < BG µg/L below limit of quantification | — | — | Single value |
| Bisphenol A | < BG µg/L below limit of quantification | 2.5 µg/l | < 0.2 % * | Single value |
| Boron | < BG mg/L below limit of quantification | 1 mg/l | < 2 % * | Single value |
| Bromacil | < BG µg/L below limit of quantification | — | — | Single value |
| Bromate | < BG µg/L below limit of quantification | 10 µg/l | < 10 % * | Single value |
| Bromodichloromethane | < BG µg/L below limit of quantification | — | — | Single value |
| Cadmium | < BG mg/L below limit of quantification | 3 µg/l | < 3 % * | Single value |
| Carbetamide | < BG µg/L below limit of quantification | — | — | Single value |
| Chloridazon | < BG µg/L below limit of quantification | — | — | Single value |
| Chlorotoluron | < BG µg/L below limit of quantification | — | — | Single value |
| Chromium | < BG mg/L below limit of quantification | 25 µg/l | < 2 % * | Single value |
| cis-1,2-Dichloroethene | < BG µg/L below limit of quantification | — | — | Single value |
| Copper | < BG mg/L below limit of quantification | 2 mg/l | < 0.5 % * | Single value |
| Cyanazine | < BG µg/L below limit of quantification | — | — | Single value |
| Cyanide | < BG mg/L below limit of quantification | 50 µg/l | < 20 % * | Single value |
| Desethylatrazine | < BG µg/L below limit of quantification | — | — | Single value |
| Desethylterbuthylazine | < BG µg/L below limit of quantification | — | — | Single value |
| Dibromochloromethane | < BG µg/L below limit of quantification | — | — | Single value |
| Dichloromethane | < BG µg/L below limit of quantification | — | — | Single value |
| Diuron | < BG µg/L below limit of quantification | — | — | Single value |
| Fluoride | 0,12 mg/L | 1.5 mg/l | 8 % | Single value |
| Hexazinone | < BG µg/L below limit of quantification | — | — | Single value |
| Indeno(1,2,3-cd)pyrene | < BG µg/L below limit of quantification | — | — | Single value |
| Isoproturon | < BG µg/L below limit of quantification | — | — | Single value |
| Lead | < BG mg/L below limit of quantification | 10 µg/l | < 10 % * | Single value |
| Lenacil | < BG µg/L below limit of quantification | — | — | Single value |
| Mercury | < BG mg/L below limit of quantification | 1 µg/l | < 5 % * | Single value |
| Metalaxyl | < BG µg/L below limit of quantification | — | — | Single value |
| Metamitron | < BG µg/L below limit of quantification | — | — | Single value |
| Metazachlor | < BG µg/L below limit of quantification | — | — | Single value |
| Methabenzthiazuron | < BG µg/L below limit of quantification | — | — | Single value |
| Metobromuron | < BG µg/L below limit of quantification | — | — | Single value |
| Metoxuron | < BG µg/L below limit of quantification | — | — | Single value |
| Metribuzin | < BG µg/L below limit of quantification | — | — | Single value |
| Nickel | < BG mg/L below limit of quantification | 20 µg/l | < 5 % * | Single value |
| Nitrate | 7,9 mg/L | 50 mg/l | 16 % | Single value |
| Nitrite | < BG mg/L below limit of quantification | 0.5 mg/l | < 2 % * | Single value |
| Pendimethalin | < BG µg/L below limit of quantification | — | — | Single value |
| Prometryn | < BG µg/L below limit of quantification | — | — | Single value |
| Propazine | < BG µg/L below limit of quantification | — | — | Single value |
| Sebuthylazine | < BG µg/L below limit of quantification | — | — | Single value |
| Selenium | < BG mg/L below limit of quantification | 10 µg/l | < 10 % * | Single value |
| Simazine | < BG µg/L below limit of quantification | — | — | Single value |
| Terbuthylazine | < BG µg/L below limit of quantification | — | — | Single value |
| Terbutryn | < BG µg/L below limit of quantification | — | — | Single value |
| Tetrachloroethene | < BG µg/L below limit of quantification | — | — | Single value |
| Tetrachloroethene and Trichloroethene (sum) | 0,000 µg/L | 10 µg/l | 0 % | Single value |
| Tetrachloromethane | < BG µg/L below limit of quantification | — | — | Single value |
| Tri-allate | < BG µg/L below limit of quantification | — | — | Single value |
| Triadimenol | < BG µg/L below limit of quantification | — | — | Single value |
| Tribromomethane (bromoform) | < BG µg/L below limit of quantification | — | — | Single value |
| Trichloroethene | < BG µg/L below limit of quantification | — | — | Single value |
| Trichloromethane (chloroform) | 0,13 µg/L | — | — | Single value |
| Trihalomethanes — Total | 0,13 µg/L | 50 µg/l | 0.3 % | Single value |
| Uranium | 0,0009 mg/L | 10 µg/l | 9 % | 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 (2)
| Parameter | Value | Parametric value | Share of the parametric value | Reference |
|---|---|---|---|---|
| Sum of 4 PFAS | 0,0055 µg/L | — | — | Single value |
| Sum of PFAS | 0,017 µg/L | 0.1 µg/l | 17 % | Single value |
Indicator parameters (13)
| Parameter | Value | Parametric value | Share of the parametric value | Reference |
|---|---|---|---|---|
| Aluminium | < BG mg/L below limit of quantification | 0.2 mg/l | < 10 % * | Single value |
| Ammonium | < BG mg/L below limit of quantification | 0.5 mg/l | < 2 % * | Single value |
| Calcite dissolution capacity | < BG mg/L below limit of quantification | 5 mg/l CaCO3 | — | Single value |
| Chloride | 23,2 mg/L | 250 mg/l | 9 % | Single value |
| Colour | ohne - | 0.5 m⁻¹ | — | Single value |
| Iron | < BG mg/L below limit of quantification | 0.2 mg/l | < 5 % * | Single value |
| Manganese | < BG mg/L below limit of quantification | 50 µg/l | < 10 % * | Single value |
| Odour | ohne - | für den Verbraucher annehmbar | — | Single value |
| pH | 7,89 - | 6,5–9,5 | — | Single value |
| Sodium | 15,6 mg/L | 200 mg/l | 8 % | Single value |
| Sulphate | 42,5 mg/L | 250 mg/l | 17 % | Single value |
| Total organic carbon (TOC) | 0,64 mg/L | ohne anormale Veränderung | — | Single value |
| Turbidity | - FNU not determined | 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 | 3,53 mmol/L | — | — | Single value |
| Base capacity to pH 8.2 | 0,081 mmol/L | — | — | Single value |
| Calcite precipitation capacity | 16 mg/L | — | — | Single value |
| Calcium | 73,4 mg/L | — | — | Single value |
| Hardness range (WRMG) | 12,9 ° dH | — | — | Single value |
| Magnesium | 11,4 mg/L | — | — | Single value |
| Oxygen | 10,6 mg/L | — | — | Single value |
| Phosphate | 0,07 mg/L | — | — | Single value |
| Potassium | 2,0 mg/L | — | — | Single value |
| Saturation index | 0,51 - | — | — | 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.
Source: https://www.naturenergie-netze.de/fileadmin/ednetze/PDF/Dienstleistungen/BetriebsfuehrungWasser/Grenzach-Wyhlen/Pruefbericht_Wasser_Grenz-Wyhlen_23_04_2026.pdf · 23.04.2026 · 17.03.2026 · retrieved on 11/07/2026
Postcodes in this zone: 79639
Frequently asked questions about drinking water in Grenzach-Wyhlen
- How hard is the water in Grenzach-Wyhlen?
- Eigenbetrieb Wasserversorgung Grenzach-Wyhlen publishes the hardness range 12,9 for the supply zone Hochbehälter 4, Grenzach-Wyhlen. 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: 23.04.2026, retrieved on 11/07/2026.
- How much nitrate is in the drinking water in Grenzach-Wyhlen?
- Eigenbetrieb Wasserversorgung Grenzach-Wyhlen publishes a nitrate value of 7,9 mg/L for the supply zone Hochbehälter 4, Grenzach-Wyhlen. The statutory parametric value is 50 mg/l; the measured value represents 16 % of the parametric value. Basis: 23.04.2026, retrieved on 11/07/2026.
- Are PFAS detectable in the drinking water in Grenzach-Wyhlen?
- Eigenbetrieb Wasserversorgung Grenzach-Wyhlen publishes for the supply zone Hochbehälter 4, Grenzach-Wyhlen a sum value PFAS-20 of 0,017 µg/L. The statutory parametric value is 0.1 µg/l; the measured value represents 17 % of the parametric value. For the sum of the 20 individual substances, this parametric value has applied since 12/01/2026. Basis: 23.04.2026, retrieved on 11/07/2026.
- Who supplies the drinking water in Grenzach-Wyhlen?
- Eigenbetrieb Wasserversorgung Grenzach-Wyhlen. The values shown here come from the supply zone Hochbehälter 4, Grenzach-Wyhlen 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.