Drinking water in Schliengen
One supply zone, water supplier: Gruppenwasserversorgung Hohlebach-Kandertal.
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.
HB Erlenboden, Riedlingen
Gruppenwasserversorgung Hohlebach-KandertalAssigned via the water supplier — the exact supply zone boundary within the postcode is not yet linked.
Water hardness
12.6 °dH
Hardness range medium
| Parameter | Value | Parametric value | Share of the parametric value | Reference |
|---|---|---|---|---|
| Nitrate | 17 mg/l | 50 mg/l | 34 % | Single value |
| Lead | <0,001 mg/l below limit of quantification | 10 µg/l | < 10 % * | Single value |
| Sulphate | 23 mg/l | 250 mg/l | 9 % | Single value |
| Sodium | 10,3 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 (93 — most recent value per parameter)
Chemical parameters (53)
| Parameter | Value | Parametric value | Share of the parametric value | Reference |
|---|---|---|---|---|
| 1,1,1-Trichloroethane | <0,001 mg/l below limit of quantification | — | — | Single value |
| 1,2-dichloroethane | <0,00075 mg/l below limit of quantification | 3 µg/l | < 25 % * | Single value |
| 2,6-Dichlorobenzamide (BAM) | <0,05 µg/l below limit of quantification | — | — | Single value |
| Antimony | <0,0005 mg/l below limit of quantification | 5 µg/l | < 10 % * | Single value |
| Arsenic | 0,0005 mg/l | 10 µg/l | 5 % | Single value |
| Atrazine | <0,02 µg/l below limit of quantification | — | — | Single value |
| Benzene | <0,00025 mg/l below limit of quantification | 1 µg/l | < 25 % * | Single value |
| Benzo(a)pyrene | <0,0025 µg/l below limit of quantification | 10 ng/l | < 25 % * | Single value |
| Benzo(b)fluoranthene | <0,01 µg/l below limit of quantification | — | — | Single value |
| Benzo(ghi)perylene | <0,01 µg/l below limit of quantification | — | — | Single value |
| Benzo(k)fluoranthene | <0,01 µg/l below limit of quantification | — | — | Single value |
| Bisphenol A | <0,5 µg/l below limit of quantification | 2.5 µg/l | < 20 % * | Single value |
| Boron | 0,018 mg/l | 1 mg/l | 2 % | Single value |
| Bromacil | <0,02 µg/l below limit of quantification | — | — | Single value |
| Bromodichloromethane | <0,001 mg/l below limit of quantification | — | — | Single value |
| Cadmium | <0,0001 mg/l below limit of quantification | 3 µg/l | < 3 % * | Single value |
| Chromium | <0,0005 mg/l below limit of quantification | 25 µg/l | < 2 % * | Single value |
| cis-1,2-Dichloroethene | <0,005 mg/l below limit of quantification | — | — | Single value |
| Copper | <0,001 mg/l below limit of quantification | 2 mg/l | < < 0.1 % * | Single value |
| Cyanazine | <0,02 µg/l below limit of quantification | — | — | Single value |
| Cyanide | <0,005 mg/l below limit of quantification | 50 µg/l | < 10 % * | Single value |
| Desethylatrazine | <0,02 µg/l below limit of quantification | — | — | Single value |
| Desethylterbuthylazine | <0,02 µg/l below limit of quantification | — | — | Single value |
| Desisopropylatrazine | <0,02 µg/l below limit of quantification | — | — | Single value |
| Dibromochloromethane | <0,001 mg/l below limit of quantification | — | — | Single value |
| Dichloromethane | <0,005 mg/l below limit of quantification | — | — | Single value |
| Fluoranthene | <0,01 µg/l below limit of quantification | — | — | Single value |
| Fluoride | 0,06 mg/l | 1.5 mg/l | 4 % | Single value |
| Hexazinone | <0,02 µg/l below limit of quantification | — | — | Single value |
| Indeno(1,2,3-cd)pyrene | <0,01 µg/l below limit of quantification | — | — | Single value |
| Lead | <0,001 mg/l below limit of quantification | 10 µg/l | < 10 % * | Single value |
| Mercury | <0,0001 mg/l below limit of quantification | 1 µg/l | < 10 % * | Single value |
| Metalaxyl | <0,02 µg/l below limit of quantification | — | — | Single value |
| Metazachlor | <0,02 µg/l below limit of quantification | — | — | Single value |
| Metolachlor | <0,02 µg/l below limit of quantification | — | — | Single value |
| Nickel | <0,001 mg/l below limit of quantification | 20 µg/l | < 5 % * | Single value |
| Nitrate | 17 mg/l | 50 mg/l | 34 % | Single value |
| Nitrite | <0,01 mg/l below limit of quantification | 0.5 mg/l | < 2 % * | Single value |
| Pesticides — Total | <0,02 µg/l below limit of quantification | 0.5 µg/l | < 4 % * | Single value |
| Polycyclic aromatic hydrocarbons | <0,01 µg/l below limit of quantification | 0.1 µg/l | < 10 % * | Single value |
| Propazine | <0,02 µg/l below limit of quantification | — | — | Single value |
| Selenium | <0,001 mg/l below limit of quantification | 10 µg/l | < 10 % * | Single value |
| Simazine | <0,02 µg/l below limit of quantification | — | — | Single value |
| Terbuthylazine | <0,02 µg/l below limit of quantification | — | — | Single value |
| Tetrachloroethene | <0,001 mg/l below limit of quantification | — | — | Single value |
| Tetrachloromethane | <0,001 mg/l below limit of quantification | — | — | Single value |
| trans-1,2-Dichloroethene | <0,005 mg/l below limit of quantification | — | — | Single value |
| Tribromomethane (bromoform) | <0,001 mg/l below limit of quantification | — | — | Single value |
| Trichloroethene | <0,001 mg/l below limit of quantification | — | — | Single value |
| Trichloromethane (chloroform) | <0,001 mg/l below limit of quantification | — | — | Single value |
| Trihalomethanes — Total | <0,001 mg/l below limit of quantification | 50 µg/l | < 2 % * | Single value |
| Uranium | 0,0008 mg/l | 10 µg/l | 8 % | Single value |
| Vinyl chloride | <0,0001 mg/l below limit of quantification | 0.5 µg/l | < 20 % * | 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 (19)
| Parameter | Value | Parametric value | Share of the parametric value | Reference |
|---|---|---|---|---|
| Perfluorobutane sulfonic acid (PFBS) | 1,4 ng/l | — | — | Single value |
| Perfluorobutanoic acid (PFBA) | 1,6 ng/l | — | — | Single value |
| Perfluorodecane sulfonic acid (PFDS) | <1,0 ng/l below limit of quantification | — | — | Single value |
| Perfluorodecanoic acid (PFDA) | <1,0 ng/l below limit of quantification | — | — | Single value |
| Perfluorododecane sulfonic acid (PFDoDS) | <1,0 ng/l below limit of quantification | — | — | Single value |
| Perfluoroheptane sulfonic acid (PFHpS) | <1,0 ng/l below limit of quantification | — | — | Single value |
| Perfluoroheptanoic acid (PFHpA) | <1,0 ng/l below limit of quantification | — | — | Single value |
| Perfluorohexane sulfonic acid (PFHxS) | <1,0 ng/l below limit of quantification | — | — | Single value |
| Perfluorohexanoic acid (PFHxA) | <1,0 ng/l below limit of quantification | — | — | Single value |
| Perfluorononane sulfonic acid (PFNS) | <1,0 ng/l below limit of quantification | — | — | Single value |
| Perfluorononanoic acid (PFNA) | <1,0 ng/l below limit of quantification | — | — | Single value |
| Perfluorooctanesulfonic acid (PFOS) | <1,0 ng/l below limit of quantification | — | — | Single value |
| Perfluorooctanoic acid (PFOA) | <1,0 ng/l below limit of quantification | — | — | Single value |
| Perfluoropentanesulfonic acid (PFPeS) | <1,0 ng/l below limit of quantification | — | — | Single value |
| Perfluoropentanoic acid (PFPeA) | <1,0 ng/l below limit of quantification | — | — | Single value |
| Perfluorotridecanesulfonic acid (PFTrDS) | <1,0 ng/l below limit of quantification | — | — | Single value |
| Perfluorotridecanoic acid (PFTrDA) | <1,0 ng/l below limit of quantification | — | — | Single value |
| Perfluoroundecanesulfonic acid (PFUnDS) | <1,0 ng/l below limit of quantification | — | — | Single value |
| Perfluoroundecanoic acid (PFUnDA) | <1,0 ng/l below limit of quantification | — | — | Single value |
Indicator parameters (14)
| Parameter | Value | Parametric value | Share of the parametric value | Reference |
|---|---|---|---|---|
| Aluminium | <0,005 mg/l below limit of quantification | 0.2 mg/l | < 3 % * | Single value |
| Ammonium | 0,03 mg/l | 0.5 mg/l | 6 % | Single value |
| Calcite dissolution capacity | -12,4 mg/l | 5 mg/l CaCO3 | — | Single value |
| Chloride | 18 mg/l | 250 mg/l | 7 % | Single value |
| Conductivity (25 °C) | 469 µS/cm | 2,790 µS/cm | — | Single value |
| Iron | <0,005 mg/l below limit of quantification | 0.2 mg/l | < 3 % * | Single value |
| Manganese | <0,005 mg/l below limit of quantification | 50 µg/l | < 10 % * | Single value |
| Odour | geruchlos | für den Verbraucher annehmbar | — | Single value |
| pH | 7,90 | 6,5–9,5 | — | Single value |
| Sodium | 10,3 mg/l | 200 mg/l | 5 % | Single value |
| Sulphate | 23 mg/l | 250 mg/l | 9 % | Single value |
| Temperature | 9,6 °C | — | — | Single value |
| Total organic carbon (TOC) | 0,47 mg/l | ohne anormale Veränderung | — | Single value |
| Turbidity | 0,54 NTU | 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 |
|---|---|---|---|---|
| Calcium | 75,2 mg/l | — | — | Single value |
| Ethylbenzene | <0,001 mg/l below limit of quantification | — | — | Single value |
| Hydrogen carbonate | 217 mg/l | — | — | Single value |
| Magnesium | 8,8 mg/l | — | — | Single value |
| Potassium | 3,8 mg/l | — | — | Single value |
| Toluene | <0,001 mg/l below limit of quantification | — | — | Single value |
| Total hardness | 2,24 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.
Source: https://www.schliengen.de/site/Schliengen-2024/get/documents_E1466616758/schliengen/Dateien/Wasserwerte/Untersuchungsbefund%20Wasserversorgung.pdf · 26.02.2026 · 22.01.2026 - 26.02.2026 (Prüfzeitraum), Entnahmedatum 22.01.2026 · retrieved on 08/08/2026
Postcodes in this zone: 79418
Frequently asked questions about drinking water in Schliengen
- How hard is the water in Schliengen?
- Gruppenwasserversorgung Hohlebach-Kandertal publishes a total hardness of 2,24 mmol/l for the supply zone HB Erlenboden, Riedlingen — that corresponds to 12.6 °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: 26.02.2026, retrieved on 08/08/2026.
- How much nitrate is in the drinking water in Schliengen?
- Gruppenwasserversorgung Hohlebach-Kandertal publishes a nitrate value of 17 mg/l for the supply zone HB Erlenboden, Riedlingen. The statutory parametric value is 50 mg/l; the measured value represents 34 % of the parametric value. Basis: 26.02.2026, retrieved on 08/08/2026.
- Who supplies the drinking water in Schliengen?
- Gruppenwasserversorgung Hohlebach-Kandertal. The values shown here come from the supply zone HB Erlenboden, Riedlingen 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.