Drinking water in 69123
One supply zone, water supplier: Stadtwerke Heidelberg Energie GmbH / Stadtwerke Heidelberg Netze.
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.
Heidelberg Hartwasserzone südlich des Neckars (versorgt durch Wasserwerke Rauschen, Schwetzinger Hardt und Neckargruppe)
Stadtwerke Heidelberg Energie GmbH / Stadtwerke Heidelberg NetzeAssigned 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 |
|---|---|---|---|---|
| Sum of PFAS | 0,018 µg/l | 0.1 µg/l | 18 % | Mean |
| Nitrate | 14 mg/l | 50 mg/l | 28 % | Mean |
| Lead | <1 µg//l below limit of quantification | 10 µg/l | — | Mean |
| Escherichia coli (E. coli) | 0 KBE/100 ml | 0/100 ml | — | Maximum · Median 0 |
| Sulphate | 83 mg/l | 250 mg/l | 33 % | Mean |
| Sodium | 25 mg/l | 200 mg/l | 13 % | Mean |
Show all recorded parameters (66 — 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 | — | Maximum · Median 0 |
| Intestinal enterococci | 0 KBE/100 ml | 0/100 ml | — | Maximum · Median 0 |
Chemical parameters (22)
| Parameter | Value | Parametric value | Share of the parametric value | Reference |
|---|---|---|---|---|
| 1,2-dichloroethane | <0,9 µg/l below limit of quantification | 3 µg/l | < 30 % * | Mean |
| Antimony | <0,5 µg/l below limit of quantification | 5 µg/l | < 10 % * | Mean |
| Arsenic | <1 µg/l below limit of quantification | 10 µg/l | < 10 % * | Mean |
| Benzene | <0,3 µg/l below limit of quantification | 1 µg/l | < 30 % * | Mean |
| Benzo(a)pyrene | <0,003 µg/l below limit of quantification | 10 ng/l | < 30 % * | Mean |
| Bisphenol A | <0,005 µg/l below limit of quantification | 2.5 µg/l | < 0.2 % * | Mean |
| Boron | 0,06 mg/l | 1 mg/l | 6 % | Mean |
| Cadmium | <0,5 µg/l below limit of quantification | 3 µg/l | < 17 % * | Mean |
| Chromium | <2 µg/l below limit of quantification | 25 µg/l | < 8 % * | Mean |
| Copper | <0,002 mg/l below limit of quantification | 2 mg/l | < 0.1 % * | Mean |
| Cyanide | <5 µg/l below limit of quantification | 50 µg/l | < 10 % * | Mean |
| Fluoride | <0,15 mg/l below limit of quantification | 1.5 mg/l | < 10 % * | Mean |
| Lead | <1 µg//l below limit of quantification | 10 µg/l | — | Mean |
| Mercury | <0,1 µg/l below limit of quantification | 1 µg/l | < 10 % * | Mean |
| Nickel | <2 µg/l below limit of quantification | 20 µg/l | < 10 % * | Mean |
| Nitrate | 14 mg/l | 50 mg/l | 28 % | Mean |
| Nitrite | <0,05 mg/l below limit of quantification | 0.5 mg/l | < 10 % * | Mean |
| Pesticides — Total | < Bestimmungsgrenzen µg/l not detectable | 0.5 µg/l | — | Mean |
| Polycyclic aromatic hydrocarbons | < Bestimmungsgrenzen µg/l not detectable | 0.1 µg/l | — | Mean |
| Selenium | <1 µg/l below limit of quantification | 10 µg/l | < 10 % * | Mean |
| Trihalomethanes — Total | <0,1 µg/l below limit of quantification | 50 µg/l | < 0.2 % * | Mean |
| Uranium | 0,5 µg/l | 10 µg/l | 5 % | 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 (16)
| Parameter | Value | Parametric value | Share of the parametric value | Reference |
|---|---|---|---|---|
| Perfluorobutane sulfonic acid (PFBS) | 0,003 µg/l | — | — | Mean |
| Perfluorobutanoic acid (PFBA) | 0,003 µg/l | — | — | Mean |
| Perfluorodecane sulfonic acid (PFDS) | <0,001 µg/l below limit of quantification | — | — | Mean |
| Perfluorodecanoic acid (PFDA) | <0,001 µg/l below limit of quantification | — | — | Mean |
| Perfluoroheptane sulfonic acid (PFHpS) | <0,001 µg/l below limit of quantification | — | — | Mean |
| Perfluoroheptanoic acid (PFHpA) | 0,001 µg/l | — | — | Mean |
| Perfluorohexane sulfonic acid (PFHxS) | 0,001 µg/l | — | — | Mean |
| Perfluorohexanoic acid (PFHxA) | 0,001 µg/l | — | — | Mean |
| Perfluorononane sulfonic acid (PFNS) | <0,001 µg/l below limit of quantification | — | — | Mean |
| Perfluorononanoic acid (PFNA) | <0,001 µg/l below limit of quantification | — | — | Mean |
| Perfluorooctanesulfonic acid (PFOS) | 0,005 µg/l | — | — | Mean |
| Perfluorooctanoic acid (PFOA) | 0,002 µg/l | — | — | Mean |
| Perfluoropentanesulfonic acid (PFPeS) | <0,001 µg/l below limit of quantification | — | — | Mean |
| Perfluoropentanoic acid (PFPeA) | 0,002 µg/l | — | — | Mean |
| Sum of 4 PFAS | 0,008 µg/l | — | — | Mean |
| Sum of PFAS | 0,018 µg/l | 0.1 µg/l | 18 % | Mean |
Indicator parameters (19)
| Parameter | Value | Parametric value | Share of the parametric value | Reference |
|---|---|---|---|---|
| Aluminium | <0,02 mg/l below limit of quantification | 0.2 mg/l | < 10 % * | Mean |
| Ammonium | <0,01 mg/l below limit of quantification | 0.5 mg/l | < 2 % * | Mean |
| Calcite dissolution capacity | -13,3 mg/l | 5 mg/l CaCO3 | — | Mean |
| Chloride | 42 mg/l | 250 mg/l | 17 % | Mean |
| Coliform bacteria | 0 KBE/100 ml | 0/100 ml | — | Maximum · Median 0 |
| Colony count 22 °C | 0 KBE/ml | ohne anormale Veränderung | — | Mean |
| Colony count 36 °C | 0 KBE/ ml | ohne anormale Veränderung | — | Mean |
| Colour | <0,1 1/m below limit of quantification | 0.5 m⁻¹ | — | Mean |
| Conductivity (25 °C) | 774 µS/cm | 2,790 µS/cm | — | Mean |
| Iron | 0,01 mg/l | 0.2 mg/l | 5 % | Mean |
| Manganese | <2 µg/l below limit of quantification | 50 µg/l | < 4 % * | Mean |
| Odour | ohne anormale Veränderung | für den Verbraucher annehmbar | — | Mean |
| pH | 7,3 - | 6,5–9,5 | — | Mean |
| Sodium | 25 mg/l | 200 mg/l | 13 % | Mean |
| Sulphate | 83 mg/l | 250 mg/l | 33 % | Mean |
| Taste | ohne anormale Veränderung | für den Verbraucher annehmbar | — | Mean |
| Temperature | 13,4 °C | — | — | Mean |
| Total organic carbon (TOC) | 1 mg/l | ohne anormale Veränderung | — | Mean |
| Turbidity | <0,1 NTU below limit of quantification | 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.
Further parameters (7)
| Parameter | Value | Parametric value | Share of the parametric value | Reference |
|---|---|---|---|---|
| Acid capacity to pH 4.3 | 5,2 mmol/l | — | — | Mean |
| Base capacity to pH 8.2 | 0,6 mmol/l | — | — | Mean |
| Calcium | 104 mg/l | — | — | Mean |
| Hydrogen carbonate | 315 mg/l | — | — | Mean |
| Magnesium | 18 mg/l | — | — | Mean |
| Potassium | 3 mg/l | — | — | Mean |
| Sum of alkaline earth metals | 19,8 °dH | — | — | 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.
Source: https://www.swhd.de/de/Hauptnavigation/Privatkunden/Wasser/Wasseranalyse/Hartwasser-suedlich-des-Neckar.pdf · 28.01.2026 · retrieved on 11/07/2026
Frequent questions about postcode 69123
- How much nitrate is in the drinking water in Postcode 69123?
- Stadtwerke Heidelberg Energie GmbH / Stadtwerke Heidelberg Netze publishes a nitrate value of 14 mg/l for the supply zone Heidelberg Hartwasserzone südlich des Neckars (versorgt durch Wasserwerke Rauschen, Schwetzinger Hardt und Neckargruppe). The statutory parametric value is 50 mg/l; the measured value represents 28 % of the parametric value. Basis: 28.01.2026, retrieved on 11/07/2026.
- Are PFAS detectable in the drinking water in Postcode 69123?
- Stadtwerke Heidelberg Energie GmbH / Stadtwerke Heidelberg Netze publishes for the supply zone Heidelberg Hartwasserzone südlich des Neckars (versorgt durch Wasserwerke Rauschen, Schwetzinger Hardt und Neckargruppe) a sum value PFAS-20 of 0,018 µg/l. The statutory parametric value is 0.1 µg/l; the measured value represents 18 % of the parametric value. For the sum of the 20 individual substances, this parametric value has applied since 12/01/2026. Basis: 28.01.2026, retrieved on 11/07/2026.
- Who supplies the drinking water in Postcode 69123?
- Stadtwerke Heidelberg Energie GmbH / Stadtwerke Heidelberg Netze. The values shown here come from the supply zone Heidelberg Hartwasserzone südlich des Neckars (versorgt durch Wasserwerke Rauschen, Schwetzinger Hardt und Neckargruppe) 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.