How hard is the water in Postcode 76199?

Stadtwerke Karlsruhe publishes a total hardness of 3,32 mmol/l for the supply zone Karlsruher Höhenstadtteile (Wasserbezug vom Zweckverband für die Wasserversorgung des Hügellandes zwischen Alb und Pfinz) — that corresponds to 18.6 °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: Publication by the water supplier, retrieved on 11/07/2026.

How much nitrate is in the drinking water in Postcode 76199?

Stadtwerke Karlsruhe publishes a nitrate value of 10,3 mg/l for the supply zone Karlsruher Höhenstadtteile (Wasserbezug vom Zweckverband für die Wasserversorgung des Hügellandes zwischen Alb und Pfinz). The statutory parametric value is 50 mg/l; the measured value represents 21 % of the parametric value. Basis: Publication by the water supplier, retrieved on 11/07/2026.

Who supplies the drinking water in Postcode 76199?

Stadtwerke Karlsruhe. The values shown here come from the supply zone Karlsruher Höhenstadtteile (Wasserbezug vom Zweckverband für die Wasserversorgung des Hügellandes zwischen Alb und Pfinz) 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.

Drinking water in 76199

For this postcode Stadtwerke Karlsruhe publishes several supply zones. Which of them serves an individual address is not published — below are the values of the zone with the most documented parameters, the remaining 1 underneath.

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.

Karlsruher Höhenstadtteile (Wasserbezug vom Zweckverband für die Wasserversorgung des Hügellandes zwischen Alb und Pfinz)

Stadtwerke Karlsruhe

Assigned via the water supplier — the exact supply zone boundary within the postcode is not yet linked.

Water hardness

18.6 °dH

Hardness range hart

Key values Karlsruher Höhenstadtteile (Wasserbezug vom Zweckverband für die Wasserversorgung des Hügellandes zwischen Alb und Pfinz)
Parameter	Value	Parametric value	Share of the parametric value	Reference
Sum of PFAS	n.b. mg/l not determined	—	—	Mean
Nitrate	10,3 mg/l	50 mg/l	21 %	Mean
Lead	< 0,001 mg/l below limit of quantification	10 µg/l	< 10 % *	Mean
Escherichia coli (E. coli)	0 Anz./100 ml	0/100 ml	—	Mean
Sulphate	29,9 mg/l	250 mg/l	12 %	Mean
Sodium	7,4 mg/l	200 mg/l	4 %	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 (73 — most recent value per parameter)

Microbiology (2)

Microbiology – Karlsruher Höhenstadtteile (Wasserbezug vom Zweckverband für die Wasserversorgung des Hügellandes zwischen Alb und Pfinz)
Parameter	Value	Parametric value	Share of the parametric value	Reference
Escherichia coli (E. coli)	0 Anz./100 ml	0/100 ml	—	Mean
Intestinal enterococci	0 Anz./100 ml	0/100 ml	—	Mean

Chemical parameters (32)

Chemical parameters – Karlsruher Höhenstadtteile (Wasserbezug vom Zweckverband für die Wasserversorgung des Hügellandes zwischen Alb und Pfinz)
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
Acrylamide	n.a. mg/l not detectable	0.1 µg/l	—	Mean
Antimony	< 0,001 mg/l below limit of quantification	5 µg/l	< 20 % *	Mean
Arsenic	0,001 mg/l	10 µg/l	10 %	Mean
Benzene	< 0,0001 mg/l below limit of quantification	1 µg/l	< 10 % *	Mean
Benzo(a)pyrene	< 0,000002 mg/l below limit of quantification	10 ng/l	< 20 % *	Mean
Bisphenol A	< 0,000005 mg/l below limit of quantification	2.5 µg/l	< 0.2 % *	Mean
Boron	< 0,02 mg/l below limit of quantification	1 mg/l	< 2 % *	Mean
Bromate	0,001 mg/l	10 µg/l	10 %	Mean
Cadmium	< 0,0001 mg/l below limit of quantification	3 µg/l	< 3 % *	Mean
Chlorate	n.a. mg/l not detectable	70 µg/l	—	Mean
Chlorite	n.a. mg/l not detectable	0.2 mg/l	—	Mean
Chromium	< 0,0005 mg/l below limit of quantification	25 µg/l	< 2 % *	Mean
Copper	0,01 mg/l	2 mg/l	0.5 %	Mean
Cyanide	< 0,01 mg/l below limit of quantification	50 µg/l	< 20 % *	Mean
Epichlorohydrin	n.a. mg/l not detectable	0.1 µg/l	—	Mean
Fluoride	0,08 mg/l	1.5 mg/l	5 %	Mean
Haloacetic acids (HAA)	n.a. mg/l not detectable	—	—	Mean
Lead	< 0,001 mg/l below limit of quantification	10 µg/l	< 10 % *	Mean
Mercury	< 0,00005 mg/l below limit of quantification	1 µg/l	< 5 % *	Mean
Microcystin-LR	n.a. mg/l not detectable	—	—	Mean
Nickel	< 0,001 mg/l below limit of quantification	20 µg/l	< 5 % *	Mean
Nitrate	10,3 mg/l	50 mg/l	21 %	Mean
Nitrite	< 0,01 mg/l below limit of quantification	0.5 mg/l	< 2 % *	Mean
Pesticides	n.b. mg/l not determined	0.1 µg/l	—	Mean
Pesticides — Total	n.b. mg/l not determined	0.5 µg/l	—	Mean
Polycyclic aromatic hydrocarbons	n.b. mg/l not determined	0.1 µg/l	—	Mean
Selenium	< 0,001 mg/l below limit of quantification	10 µg/l	< 10 % *	Mean
Tetrachloroethene and Trichloroethene (sum)	0,0007 mg/l	10 µg/l	7 %	Mean
Trihalomethanes — Total	0,0009 mg/l	50 µg/l	2 %	Mean
Uranium	0,0012 mg/l	10 µg/l	12 %	Mean
Vinyl chloride	n.a. mg/l not detectable	0.5 µg/l	—	Mean

PFAS (2)

PFAS – Karlsruher Höhenstadtteile (Wasserbezug vom Zweckverband für die Wasserversorgung des Hügellandes zwischen Alb und Pfinz)
Parameter	Value	Parametric value	Share of the parametric value	Reference
Sum of 4 PFAS	n.b. mg/l not determined	—	—	Mean
Sum of PFAS	n.b. mg/l not determined	—	—	Mean

Indicator parameters (20)

Indicator parameters – Karlsruher Höhenstadtteile (Wasserbezug vom Zweckverband für die Wasserversorgung des Hügellandes zwischen Alb und Pfinz)
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	– mg/l CaCO3 not determined	5 mg/l CaCO3	—	Mean
Chloride	16,6 mg/l	250 mg/l	7 %	Mean
Clostridium perfringens (including spores)	0 Anzahl/100 ml	0/100 ml	—	Mean
Coliform bacteria	0 Anzahl/100 ml	0/100 ml	—	Mean
Colony count 22 °C	< 1 Anzahl/ml below limit of quantification	ohne anormale Veränderung	—	Mean
Colony count 36 °C	< 1 Anzahl/ml below limit of quantification	ohne anormale Veränderung	—	Mean
Colour	< 0,1 m-1 below limit of quantification	0.5 m⁻¹	—	Mean
Conductivity (25 °C)	654 μS/cm	2,790 µS/cm	—	Mean
Iron	< 0,01 mg/l below limit of quantification	0.2 mg/l	< 5 % *	Mean
Manganese	< 0,005 mg/l below limit of quantification	50 µg/l	< 10 % *	Mean
Odour	ohne	für den Verbraucher annehmbar	—	Mean
Oxidisability	n.a. mg/l O2 not detectable	5 mg/l O2	—	Mean
pH	7,33 pH-Einheiten	6,5–9,5	—	Mean
Sodium	7,4 mg/l	200 mg/l	4 %	Mean
Sulphate	29,9 mg/l	250 mg/l	12 %	Mean
Taste	ohne	für den Verbraucher annehmbar	—	Mean
Total organic carbon (TOC)	0,47 mg/l	ohne anormale Veränderung	—	Mean
Turbidity	0,10 Nephelometrische Trübungseinheiten (NTU)	1 NTU	—	Mean

Radiology (3)

Radiology – Karlsruher Höhenstadtteile (Wasserbezug vom Zweckverband für die Wasserversorgung des Hügellandes zwischen Alb und Pfinz)
Parameter	Value	Parametric value	Share of the parametric value	Reference
Indicative dose	n.a. mSv/a not detectable	0.1 mSv/a	—	Mean
Radon-222	n.a. Bq/l not detectable	100 Bq/l	—	Mean
Tritium	n.a. Bq/l not detectable	100 Bq/l	—	Mean

Further parameters (14)

Further parameters – Karlsruher Höhenstadtteile (Wasserbezug vom Zweckverband für die Wasserversorgung des Hügellandes zwischen Alb und Pfinz)
Parameter	Value	Parametric value	Share of the parametric value	Reference
Acid capacity to pH 4.3	5,79 mmol/l	—	—	Mean
Base capacity to pH 8.2	0,60 mmol/l	—	—	Mean
Calcite precipitation capacity	23 mg/l CaCO3	—	—	Mean
Calcium	2,46 mmol/l	—	—	Mean
Carbonate hardness	2,78 mmol/l	—	—	Mean
Hardness range (WRMG)	hart –	—	—	Mean
Hydrogen carbonate	350 mg/l	—	—	Mean
Magnesium	0,86 mmol/l	—	—	Mean
Oxygen	9,1 mg/l	—	—	Mean
Phosphate	0,04 mg/l	—	—	Mean
Potassium	0,04 mmol/l	—	—	Mean
Silicate / silicic acid	4,4 mg/l	—	—	Mean
Spectral absorption coefficient 254 nm (SAC 254)	0,8 m-1	—	—	Mean
Total hardness	3,32 mmol/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.

Source: www.stadtwerke-karlsruhe.de · Jahresmittelwerte 2025 · retrieved on 11/07/2026

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