How hard is the water in Kempen?

Stadtwerke Kempen GmbH publishes a total hardness of 12 °dH for the supply zone Wasserwerk Kempen, WW-Ausgang (WWKe135), Entnahmearmatur (hardness range mittel). 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: 29.04.2026, retrieved on 08/07/2026.

Who supplies the drinking water in Kempen?

Stadtwerke Kempen GmbH. The values shown here come from the supply zone Wasserwerk Kempen, WW-Ausgang (WWKe135), Entnahmearmatur 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 Kempen

One supply zone, water supplier: Stadtwerke Kempen 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 Kempen, WW-Ausgang (WWKe135), Entnahmearmatur

Stadtwerke Kempen GmbH

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

Water hardness

12 °dH

Hardness range mittel

Key values Wasserwerk Kempen, WW-Ausgang (WWKe135), Entnahmearmatur
Parameter	Value	Parametric value	Share of the parametric value	Reference
Nitrate	0,0776 mol/m³	50 mg/l	—	Single value · Source [1]
Escherichia coli (E. coli)	0 MPN/100ml	0/100 ml	—	Single value · Source [1]
Sulphate	1,15 mol/m³	250 mg/l	—	Single value · Source [1]
Sodium	2,00 mol/m³	200 mg/l	—	Single value · Source [1]

Show all recorded parameters (107 — most recent value per parameter)

Microbiology (2)

Microbiology – Wasserwerk Kempen, WW-Ausgang (WWKe135), Entnahmearmatur
Parameter	Value	Parametric value	Share of the parametric value	Reference
Escherichia coli (E. coli)	0 MPN/100ml	0/100 ml	—	Single value · Source [1]
Intestinal enterococci	0 KBE/100ml	0/100 ml	—	Single value · Source [1]

Chemical parameters (53)

Chemical parameters – Wasserwerk Kempen, WW-Ausgang (WWKe135), Entnahmearmatur
Parameter	Value	Parametric value	Share of the parametric value	Reference
1,2-dichloroethane	<0,1 µg/l below limit of quantification	3 µg/l	< 3 % *	Single value · Source [1]
Acrylamide	<0,03 µg/l below limit of quantification	0.1 µg/l	< 30 % *	Single value · Source [1]
Atrazine	<0,03 µg/l below limit of quantification	—	—	Single value · Source [1]
Bentazone	<0,02 µg/l below limit of quantification	—	—	Single value · Source [1]
Benzene	<0,10 µg/l below limit of quantification	1 µg/l	< 10 % *	Single value · Source [1]
Boron	0,017 mg/l	1 mg/l	2 %	Single value · Source [1]
Bromacil	<0,03 µg/l below limit of quantification	—	—	Single value · Source [1]
Bromate	<0,002 mg/l below limit of quantification	10 µg/l	< 20 % *	Single value · Source [1]
Bromoxynil	<0,03 µg/l below limit of quantification	—	—	Single value · Source [1]
Carbofuran	<0,03 µg/l below limit of quantification	—	—	Single value · Source [1]
Chloridazon	<0,03 µg/l below limit of quantification	—	—	Single value · Source [1]
Chlorotoluron	<0,03 µg/l below limit of quantification	—	—	Single value · Source [1]
Chromium	<0,00050 mg/l below limit of quantification	25 µg/l	< 2 % *	Single value · Source [1]
Cyanide	<0,0050 mg/l below limit of quantification	50 µg/l	< 10 % *	Single value · Source [1]
Dichlorprop	<0,03 µg/l below limit of quantification	—	—	Single value · Source [1]
Diflufenican	<0,03 µg/l below limit of quantification	—	—	Single value · Source [1]
Dimethenamid	<0,03 µg/l below limit of quantification	—	—	Single value · Source [1]
Diuron	<0,03 µg/l below limit of quantification	—	—	Single value · Source [1]
Ethidimuron	<0,03 µg/l below limit of quantification	—	—	Single value · Source [1]
Ethofumesate	<0,03 µg/l below limit of quantification	—	—	Single value · Source [1]
Flufenacet	<0,03 µg/l below limit of quantification	—	—	Single value · Source [1]
Fluoride	0,10 mg/l	1.5 mg/l	7 %	Single value · Source [1]
Glyphosate	<0,03 µg/l below limit of quantification	—	—	Single value · Source [1]
Hexazinone	<0,03 µg/l below limit of quantification	—	—	Single value · Source [1]
Imidacloprid	<0,03 µg/l below limit of quantification	—	—	Single value · Source [1]
Isoproturon	<0,03 µg/l below limit of quantification	—	—	Single value · Source [1]
MCPA	<0,02 µg/l below limit of quantification	—	—	Single value · Source [1]
Mecoprop	<0,02 µg/l below limit of quantification	—	—	Single value · Source [1]
Mercury	<0,00010 mg/l below limit of quantification	1 µg/l	< 10 % *	Single value · Source [1]
Metalaxyl	<0,03 µg/l below limit of quantification	—	—	Single value · Source [1]
Metamitron	<0,03 µg/l below limit of quantification	—	—	Single value · Source [1]
Metazachlor	<0,03 µg/l below limit of quantification	—	—	Single value · Source [1]
Methabenzthiazuron	<0,03 µg/l below limit of quantification	—	—	Single value · Source [1]
Metobromuron	<0,03 µg/l below limit of quantification	—	—	Single value · Source [1]
Metolachlor	<0,03 µg/l below limit of quantification	—	—	Single value · Source [1]
Metribuzin	<0,03 µg/l below limit of quantification	—	—	Single value · Source [1]
Microcystin-LR	- not determined Unit not stated in the document	1 µg/l	—	Single value · Source [1]
Monuron	<0,03 µg/l below limit of quantification	—	—	Single value · Source [1]
Nicosulfuron	<0,03 µg/l below limit of quantification	—	—	Single value · Source [1]
Nitrate	0,0776 mol/m³	50 mg/l	—	Single value · Source [1]
Nitrite	- not determined Unit not stated in the document	0.5 mg/l	—	Single value · Source [1]
Pendimethalin	<0,03 µg/l below limit of quantification	—	—	Single value · Source [1]
Propazine	<0,02 µg/l below limit of quantification	—	—	Single value · Source [1]
Propiconazole	<0,03 µg/l below limit of quantification	—	—	Single value · Source [1]
Prosulfocarb	<0,03 µg/l below limit of quantification	—	—	Single value · Source [1]
Quinmerac	<0,03 µg/l below limit of quantification	—	—	Single value · Source [1]
Selenium	<0,0010 mg/l below limit of quantification	10 µg/l	< 10 % *	Single value · Source [1]
Simazine	<0,03 µg/l below limit of quantification	—	—	Single value · Source [1]
Tebuconazole	<0,03 µg/l below limit of quantification	—	—	Single value · Source [1]
Terbuthylazine	<0,03 µg/l below limit of quantification	—	—	Single value · Source [1]
Terbutryn	<0,03 µg/l below limit of quantification	—	—	Single value · Source [1]
Triadimenol	<0,03 µg/l below limit of quantification	—	—	Single value · Source [1]
Uranium	0,00055 mg/l	10 µg/l	6 %	Single value · Source [1]

* 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 (21)

PFAS – Wasserwerk Kempen, WW-Ausgang (WWKe135), Entnahmearmatur
Parameter	Value	Parametric value	Share of the parametric value	Reference
HFPO-DA (GenX)	<0,001 µg/l below limit of quantification	—	—	Single value · Source [2]
Perfluorobutane sulfonic acid (PFBS)	0,003 µg/l	—	—	Single value · Source [2]
Perfluorobutanoic acid (PFBA)	0,002 µg/l	—	—	Single value · Source [2]
Perfluorodecane sulfonic acid (PFDS)	<0,001 µg/l below limit of quantification	—	—	Single value · Source [2]
Perfluorodecanoic acid (PFDA)	<0,001 µg/l below limit of quantification	—	—	Single value · Source [2]
Perfluorododecane sulfonic acid (PFDoDS)	<0,001 µg/l below limit of quantification	—	—	Single value · Source [2]
Perfluorododecanoic acid (PFDoDA)	<0,001 µg/l below limit of quantification	—	—	Single value · Source [2]
Perfluoroheptane sulfonic acid (PFHpS)	<0,001 µg/l below limit of quantification	—	—	Single value · Source [2]
Perfluoroheptanoic acid (PFHpA)	<0,001 µg/l below limit of quantification	—	—	Single value · Source [2]
Perfluorohexane sulfonic acid (PFHxS)	<0,001 µg/l below limit of quantification	—	—	Single value · Source [2]
Perfluorohexanoic acid (PFHxA)	<0,001 µg/l below limit of quantification	—	—	Single value · Source [2]
Perfluorononane sulfonic acid (PFNS)	<0,001 µg/l below limit of quantification	—	—	Single value · Source [2]
Perfluorononanoic acid (PFNA)	<0,001 µg/l below limit of quantification	—	—	Single value · Source [2]
Perfluorooctanesulfonic acid (PFOS)	<0,001 µg/l below limit of quantification	—	—	Single value · Source [2]
Perfluorooctanoic acid (PFOA)	0,006 µg/l	—	—	Single value · Source [2]
Perfluoropentanesulfonic acid (PFPeS)	<0,001 µg/l below limit of quantification	—	—	Single value · Source [2]
Perfluoropentanoic acid (PFPeA)	<0,001 µg/l below limit of quantification	—	—	Single value · Source [2]
Perfluorotridecanesulfonic acid (PFTrDS)	<0,001 µg/l below limit of quantification	—	—	Single value · Source [2]
Perfluorotridecanoic acid (PFTrDA)	<0,001 µg/l below limit of quantification	—	—	Single value · Source [2]
Perfluoroundecanesulfonic acid (PFUnDS)	<0,001 µg/l below limit of quantification	—	—	Single value · Source [2]
Perfluoroundecanoic acid (PFUnDA)	<0,001 µg/l below limit of quantification	—	—	Single value · Source [2]

Indicator parameters (20)

Indicator parameters – Wasserwerk Kempen, WW-Ausgang (WWKe135), Entnahmearmatur
Parameter	Value	Parametric value	Share of the parametric value	Reference
Aluminium	<0,010 mg/l below limit of quantification	0.2 mg/l	< 5 % *	Single value · Source [1]
Ammonium	<0,020 mg/l below limit of quantification	0.5 mg/l	< 4 % *	Single value · Source [1]
Calcite dissolution capacity	1,1 mg/l	5 mg/l CaCO3	—	Single value · Source [1]
Chloride	1,37 mol/m³	250 mg/l	—	Single value · Source [1]
Clostridium perfringens (including spores)	- not determined Unit not stated in the document	0/100 ml	—	Single value · Source [1]
Colony count 22 °C	0 KBE/ml	ohne anormale Veränderung	—	Single value · Source [1]
Colony count 36 °C	0 KBE/ml	ohne anormale Veränderung	—	Single value · Source [1]
Colour	0,10 m-1	0.5 m⁻¹	—	Single value · Source [1]
Conductivity (25 °C)	642 µS/cm	2,790 µS/cm	—	Single value · Source [1]
Iron	<0,005 mg/l below limit of quantification	0.2 mg/l	< 3 % *	Single value · Source [1]
Manganese	<0,005 mg/l below limit of quantification	50 µg/l	< 10 % *	Single value · Source [1]
Odour	ohne	für den Verbraucher annehmbar	—	Single value · Source [1]
Oxidisability	- not determined Unit not stated in the document	5 mg/l O2	—	Single value · Source [1]
Sodium	2,00 mol/m³	200 mg/l	—	Single value · Source [1]
Sulphate	1,15 mol/m³	250 mg/l	—	Single value · Source [1]
Taste	ohne	für den Verbraucher annehmbar	—	Single value · Source [1]
Temperature	11,4 °C	—	—	Single value · Source [1]
Threshold odour number (TON)	- not determined	—	—	Single value · Source [1]
Total organic carbon (TOC)	1,9 g/m³	ohne anormale Veränderung	—	Single value · Source [1]
Turbidity	<0,10 NTU below limit of quantification	1 NTU	—	Single value · Source [1]

Treatment substances (1)

Treatment substances – Wasserwerk Kempen, WW-Ausgang (WWKe135), Entnahmearmatur
Parameter	Value	Parametric value	Share of the parametric value	Reference
Free chlorine	- not determined	—	—	Single value · Source [1]

Further parameters (10)

Further parameters – Wasserwerk Kempen, WW-Ausgang (WWKe135), Entnahmearmatur
Parameter	Value	Parametric value	Share of the parametric value	Reference
Acid capacity to pH 4.3	2,74 mol/m³	—	—	Single value · Source [1]
Base capacity to pH 8.2	0,120 mol/m³	—	—	Single value · Source [1]
Calcium	1,45 mol/m³	—	—	Single value · Source [1]
Hardness range (WRMG)	mittel	—	—	Single value · Source [1]
Magnesium	0,680 mol/m³	—	—	Single value · Source [1]
Oxygen	11 g/m³	—	—	Single value · Source [1]
Phosphate	<0,10 mg/l below limit of quantification	—	—	Single value · Source [1]
Potassium	0,0944 mol/m³	—	—	Single value · Source [1]
Sum of alkaline earth metals	2,13 mol/m³	—	—	Single value · Source [1]
Total hardness	12,0 °dH	—	—	Single value · Source [1]

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] https://www.stadtwerke-kempen.de/de/Wasser/Trinkwasseranalyse-Kempen/KEM-WWKe-gr.-Wasseranalyse-TVO-2026.04.08.pdf · 29.04.2026 · Probenahme 08.04.2026 09:01 · retrieved on 08/07/2026 [2] https://www.stadtwerke-kempen.de/de/Wasser/Trinkwasseranalyse-Kempen/KEM-WWKe-gr.-Wasseranalyse-TVO-PFAS-2026.04.08.pdf · 29.04.2026 · Probenahme 08.04.2026 09:01, Analyse 08.04.2026 15:50 - 14.04.2026 · retrieved on 08/07/2026

Postcodes in this zone: 47906

Frequently asked questions about drinking water in Kempen

How hard is the water in Kempen?: Stadtwerke Kempen GmbH publishes a total hardness of 12 °dH for the supply zone Wasserwerk Kempen, WW-Ausgang (WWKe135), Entnahmearmatur (hardness range mittel). 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: 29.04.2026, retrieved on 08/07/2026.
Who supplies the drinking water in Kempen?: Stadtwerke Kempen GmbH. The values shown here come from the supply zone Wasserwerk Kempen, WW-Ausgang (WWKe135), Entnahmearmatur 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.