How hard is the water in Postcode 45527?

Gelsenwasser publishes a total hardness of 7.7 °dH for the supply zone Verbundwasserwerk Essen; Entnahmestelle: Trinkwasser Essen nach UV Ltg. Überruhr, WAA 2 (00-0350) (hardness range weich). 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 45527?

Gelsenwasser publishes a nitrate value of 9,2 mg/l for the supply zone Verbundwasserwerk Essen; Entnahmestelle: Trinkwasser Essen nach UV Ltg. Überruhr, WAA 2 (00-0350). The statutory parametric value is 50 mg/l; the measured value represents 18 % of the parametric value. Basis: Publication by the water supplier, retrieved on 11/07/2026.

Who supplies the drinking water in Postcode 45527?

Gelsenwasser. The values shown here come from the supply zone Verbundwasserwerk Essen; Entnahmestelle: Trinkwasser Essen nach UV Ltg. Überruhr, WAA 2 (00-0350) 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 45527

For this postcode the responsible water supplier 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 8 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.

Verbundwasserwerk Essen; Entnahmestelle: Trinkwasser Essen nach UV Ltg. Überruhr, WAA 2 (00-0350)

Gelsenwasser

Water hardness

7.7 °dH

Hardness range weich

Key values Verbundwasserwerk Essen; Entnahmestelle: Trinkwasser Essen nach UV Ltg. Überruhr, WAA 2 (00-0350)
Parameter	Value	Parametric value	Share of the parametric value	Reference
Nitrate	9,2 mg/l	50 mg/l	18 %	Mean
Lead	<0,0005 mg/l below limit of quantification	10 µg/l	< 5 % *	Mean
Escherichia coli (E. coli)	0 KBE/100 ml	0/100 ml	—	Mean
Sulphate	42 mg/l	250 mg/l	17 %	Mean
Sodium	41 mg/l	200 mg/l	21 %	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 (59 — most recent value per parameter)

Microbiology (2)

Microbiology – Verbundwasserwerk Essen; Entnahmestelle: Trinkwasser Essen nach UV Ltg. Überruhr, WAA 2 (00-0350)
Parameter	Value	Parametric value	Share of the parametric value	Reference
Escherichia coli (E. coli)	0 KBE/100 ml	0/100 ml	—	Mean
Intestinal enterococci	0 KBE/100 ml	0/100 ml	—	Mean

Chemical parameters (26)

Chemical parameters – Verbundwasserwerk Essen; Entnahmestelle: Trinkwasser Essen nach UV Ltg. Überruhr, WAA 2 (00-0350)
Parameter	Value	Parametric value	Share of the parametric value	Reference
1,2-dichloroethane	<0,05 µg/l below limit of quantification	3 µg/l	< 2 % *	Mean
Antimony	<0,001 mg/l below limit of quantification	5 µg/l	< 20 % *	Mean
Arsenic	<0,0005 mg/l below limit of quantification	10 µg/l	< 5 % *	Mean
Benzene	<0,05 µg/l below limit of quantification	1 µg/l	< 5 % *	Mean
Benzo(a)pyrene	<0,0025 µg/l below limit of quantification	10 ng/l	< 25 % *	Mean
Bisphenol A	<0,015 µg/l below limit of quantification	2.5 µg/l	< 0.6 % *	Mean
Boron	0,07 mg/l	1 mg/l	7 %	Mean
Bromate	<0,0030 mg/l below limit of quantification	10 µg/l	< 30 % *	Mean
Cadmium	<0,0003 mg/l below limit of quantification	3 µg/l	< 10 % *	Mean
Chlorate	<0,003 mg/l below limit of quantification	70 µg/l	< 4 % *	Mean
Chlorite	<0,010 mg/l below limit of quantification	0.2 mg/l	< 5 % *	Mean
Chromium	<0,0004 mg/l below limit of quantification	25 µg/l	< 2 % *	Mean
Copper	<0,005 mg/l below limit of quantification	2 mg/l	< 0.3 % *	Mean
Cyanide	<0,005 mg/l below limit of quantification	50 µg/l	< 10 % *	Mean
Fluoride	0,11 mg/l	1.5 mg/l	7 %	Mean
Lead	<0,0005 mg/l below limit of quantification	10 µg/l	< 5 % *	Mean
Mercury	<0,0001 mg/l below limit of quantification	1 µg/l	< 10 % *	Mean
Nickel	<0,002 mg/l below limit of quantification	20 µg/l	< 10 % *	Mean
Nitrate	9,2 mg/l	50 mg/l	18 %	Mean
Nitrite	0,01 mg/l	0.5 mg/l	2 %	Mean
Pesticides — Total	<0,025 µg/l below limit of quantification	0.5 µg/l	< 5 % *	Mean
Polycyclic aromatic hydrocarbons	<0,005 µg/l below limit of quantification	0.1 µg/l	< 5 % *	Mean
Selenium	<0,001 mg/l below limit of quantification	10 µg/l	< 10 % *	Mean
Tetrachloroethene and Trichloroethene (sum)	<0,05 µg/l below limit of quantification	10 µg/l	< 0.5 % *	Mean
Trihalomethanes — Total	<0,050 µg/l below limit of quantification	50 µg/l	< 0.1 % *	Mean
Uranium	<0,001 mg/l below limit of quantification	10 µg/l	< 10 % *	Mean

Indicator parameters (18)

Indicator parameters – Verbundwasserwerk Essen; Entnahmestelle: Trinkwasser Essen nach UV Ltg. Überruhr, WAA 2 (00-0350)
Parameter	Value	Parametric value	Share of the parametric value	Reference
Aluminium	<0,010 mg/l below limit of quantification	0.2 mg/l	< 5 % *	Mean
Ammonium	<0,05 mg/l below limit of quantification	0.5 mg/l	< 10 % *	Mean
Calcite dissolution capacity	1 mg/l	5 mg/l CaCO3	—	Mean
Chloride	55 mg/l	250 mg/l	22 %	Mean
Clostridium perfringens (including spores)	0 KBE/100 ml	0/100 ml	—	Mean
Coliform bacteria	0 KBE/100 ml	0/100 ml	—	Mean
Colony count 22 °C	0 KBE/ml	ohne anormale Veränderung	—	Mean
Colony count 36 °C	0 KBE/ml	ohne anormale Veränderung	—	Mean
Colour	<0,10 1/m below limit of quantification	0.5 m⁻¹	—	Mean
Conductivity (25 °C)	491 µS/cm	2,790 µS/cm	—	Mean
Iron	<0,010 mg/l below limit of quantification	0.2 mg/l	< 5 % *	Mean
Manganese	<0,002 mg/l below limit of quantification	50 µg/l	< 4 % *	Mean
pH	7,9	6,5–9,5	—	Mean
Sodium	41 mg/l	200 mg/l	21 %	Mean
Sulphate	42 mg/l	250 mg/l	17 %	Mean
Temperature	14,1 °C	—	—	Mean
Total organic carbon (TOC)	0,8 mg/l	ohne anormale Veränderung	—	Mean
Turbidity	<0,05 FNU below limit of quantification	1 NTU	—	Mean

Radiology (2)

Radiology – Verbundwasserwerk Essen; Entnahmestelle: Trinkwasser Essen nach UV Ltg. Überruhr, WAA 2 (00-0350)
Parameter	Value	Parametric value	Share of the parametric value	Reference
Indicative dose	<0,1 mSv/a below limit of quantification	0.1 mSv/a	—	Mean
Radon-222	<10 Bq/l below limit of quantification	100 Bq/l	—	Mean

Further parameters (11)

Further parameters – Verbundwasserwerk Essen; Entnahmestelle: Trinkwasser Essen nach UV Ltg. Überruhr, WAA 2 (00-0350)
Parameter	Value	Parametric value	Share of the parametric value	Reference
Acid capacity to pH 4.3	2,2 mmol/l	—	—	Mean
Base capacity to pH 8.2	0,06 mmol/l	—	—	Mean
Calcium	42 mg/l	—	—	Mean
Carbonate hardness	6,2 °dH	—	—	Mean
Hardness range (WRMG)	weich	—	—	Mean
Magnesium	7,9 mg/l	—	—	Mean
Oxygen	10,5 mg/l	—	—	Mean
Phosphate	0,23 mg/l	—	—	Mean
Potassium	4,4 mg/l	—	—	Mean
Silicate / silicic acid	4,9 mg/l	—	—	Mean
Total hardness	7,7 °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.gelsenwasser.de/fileadmin/twa/downloads/gelsenwasser/trinkwasseranalyse_essen.pdf · 2025 · retrieved on 11/07/2026

Show 8 more supply zones in this postcode

Wasserwerk Bucholtwelmen

Gelsenwasser

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

Water hardness

14.7 °dH

Hardness range hart

Key values Wasserwerk Bucholtwelmen
Parameter	Value	Parametric value	Share of the parametric value	Reference
Nitrate	15 mg/l	50 mg/l	30 %	Mean
Lead	<0,0005 mg/l below limit of quantification	10 µg/l	< 5 % *	Mean
Escherichia coli (E. coli)	0 KBE/100 ml	0/100 ml	—	Mean
Sulphate	83 mg/l	250 mg/l	33 %	Mean
Sodium	15 mg/l	200 mg/l	8 %	Mean

Show all recorded parameters (57 — most recent value per parameter)

Microbiology (2)

Microbiology – Wasserwerk Bucholtwelmen
Parameter	Value	Parametric value	Share of the parametric value	Reference
Escherichia coli (E. coli)	0 KBE/100 ml	0/100 ml	—	Mean
Intestinal enterococci	0 KBE/100 ml	0/100 ml	—	Mean

Chemical parameters (24)

Chemical parameters – Wasserwerk Bucholtwelmen
Parameter	Value	Parametric value	Share of the parametric value	Reference
1,2-dichloroethane	<0,05 µg/l below limit of quantification	3 µg/l	< 2 % *	Mean
Antimony	<0,001 mg/l below limit of quantification	5 µg/l	< 20 % *	Mean
Arsenic	<0,0005 mg/l below limit of quantification	10 µg/l	< 5 % *	Mean
Benzene	<0,05 µg/l below limit of quantification	1 µg/l	< 5 % *	Mean
Benzo(a)pyrene	<0,0025 µg/l below limit of quantification	10 ng/l	< 25 % *	Mean
Bisphenol A	<0,015 µg/l below limit of quantification	2.5 µg/l	< 0.6 % *	Mean
Boron	0,05 mg/l	1 mg/l	5 %	Mean
Bromate	<0,0030 mg/l below limit of quantification	10 µg/l	< 30 % *	Mean
Cadmium	<0,0003 mg/l below limit of quantification	3 µg/l	< 10 % *	Mean
Chromium	<0,0004 mg/l below limit of quantification	25 µg/l	< 2 % *	Mean
Copper	<0,005 mg/l below limit of quantification	2 mg/l	< 0.3 % *	Mean
Cyanide	<0,005 mg/l below limit of quantification	50 µg/l	< 10 % *	Mean
Fluoride	0,1 mg/l	1.5 mg/l	7 %	Mean
Lead	<0,0005 mg/l below limit of quantification	10 µg/l	< 5 % *	Mean
Mercury	<0,0001 mg/l below limit of quantification	1 µg/l	< 10 % *	Mean
Nickel	<0,002 mg/l below limit of quantification	20 µg/l	< 10 % *	Mean
Nitrate	15 mg/l	50 mg/l	30 %	Mean
Nitrite	<0,01 mg/l below limit of quantification	0.5 mg/l	< 2 % *	Mean
Pesticides — Total	<0,025 µg/l below limit of quantification	0.5 µg/l	< 5 % *	Mean
Polycyclic aromatic hydrocarbons	<0,005 µg/l below limit of quantification	0.1 µg/l	< 5 % *	Mean
Selenium	<0,001 mg/l below limit of quantification	10 µg/l	< 10 % *	Mean
Tetrachloroethene and Trichloroethene (sum)	0,06 µg/l	10 µg/l	0.6 %	Mean
Trihalomethanes — Total	<0,050 µg/l below limit of quantification	50 µg/l	< 0.1 % *	Mean
Uranium	0,001 mg/l	10 µg/l	10 %	Mean

Indicator parameters (18)

Indicator parameters – Wasserwerk Bucholtwelmen
Parameter	Value	Parametric value	Share of the parametric value	Reference
Aluminium	<0,010 mg/l below limit of quantification	0.2 mg/l	< 5 % *	Mean
Ammonium	<0,05 mg/l below limit of quantification	0.5 mg/l	< 10 % *	Mean
Calcite dissolution capacity	2 mg/l	5 mg/l CaCO3	—	Mean
Chloride	27 mg/l	250 mg/l	11 %	Mean
Clostridium perfringens (including spores)	0 KBE/100 ml	0/100 ml	—	Mean
Coliform bacteria	0 KBE/100 ml	0/100 ml	—	Mean
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	0.5 m⁻¹	—	Mean
Conductivity (25 °C)	606 µS/cm	2,790 µS/cm	—	Mean
Iron	<0,010 mg/l below limit of quantification	0.2 mg/l	< 5 % *	Mean
Manganese	<0,002 mg/l below limit of quantification	50 µg/l	< 4 % *	Mean
pH	7,42	6,5–9,5	—	Mean
Sodium	15 mg/l	200 mg/l	8 %	Mean
Sulphate	83 mg/l	250 mg/l	33 %	Mean
Temperature	11,1 °C	—	—	Mean
Total organic carbon (TOC)	2,1 mg/l	ohne anormale Veränderung	—	Mean
Turbidity	0,05 FNU	1 NTU	—	Mean

Radiology (2)

Radiology – Wasserwerk Bucholtwelmen
Parameter	Value	Parametric value	Share of the parametric value	Reference
Indicative dose	<0,1 mSv/a below limit of quantification	0.1 mSv/a	—	Mean
Radon-222	13 Bq/l	100 Bq/l	—	Mean

Further parameters (11)

Further parameters – Wasserwerk Bucholtwelmen
Parameter	Value	Parametric value	Share of the parametric value	Reference
Acid capacity to pH 4.3	3,45 mmol/l	—	—	Mean
Base capacity to pH 8.2	0,34 mmol/l	—	—	Mean
Calcium	93 mg/l	—	—	Mean
Carbonate hardness	9,7 °dH	—	—	Mean
Hardness range (WRMG)	hart	—	—	Mean
Magnesium	7,6 mg/l	—	—	Mean
Oxygen	6,8 mg/l	—	—	Mean
Phosphate	0,06 mg/l	—	—	Mean
Potassium	5,5 mg/l	—	—	Mean
Silicate / silicic acid	12,4 mg/l	—	—	Mean
Total hardness	14,7 °dH	—	—	Mean

Source: https://www.gelsenwasser.de/fileadmin/twa/downloads/huenxe_voerde/trinkwasseranalyse_bucholtwelmen.pdf · 2025 · retrieved on 13/07/2026

Verbundwasserwerk Essen

Stadtwerke Hattingen GmbH

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

Water hardness

7.7 °dH

Hardness range weich

Key values Verbundwasserwerk Essen
Parameter	Value	Parametric value	Share of the parametric value	Reference
Nitrate	9,2 mg/l	50 mg/l	18 %	Mean
Lead	nicht nachweisbar mg/l not detectable	10 µg/l	—	Mean
Escherichia coli (E. coli)	0,0 /100 ml	0/100 ml	—	Mean
Sulphate	42,0 mg/l	250 mg/l	17 %	Mean
Sodium	41,0 mg/l	200 mg/l	21 %	Mean

Show all recorded parameters (55 — most recent value per parameter)

Microbiology (2)

Microbiology – Verbundwasserwerk Essen
Parameter	Value	Parametric value	Share of the parametric value	Reference
Escherichia coli (E. coli)	0,0 /100 ml	0/100 ml	—	Mean
Intestinal enterococci	0,0 /100 ml	0/100 ml	—	Mean

Chemical parameters (24)

Chemical parameters – Verbundwasserwerk Essen
Parameter	Value	Parametric value	Share of the parametric value	Reference
1,2-dichloroethane	nicht nachweisbar µg/l not detectable	3 µg/l	—	Mean
Antimony	nicht nachweisbar mg/l not detectable	5 µg/l	—	Mean
Arsenic	nicht nachweisbar mg/l not detectable	10 µg/l	—	Mean
Benzene	nicht nachweisbar µg/l not detectable	1 µg/l	—	Mean
Benzo(a)pyrene	nicht nachweisbar µg/l not detectable	10 ng/l	—	Mean
Boron	0,07 mg/l	1 mg/l	7 %	Mean
Bromate	nicht nachweisbar mg/l not detectable	10 µg/l	—	Mean
Cadmium	nicht nachweisbar mg/l not detectable	3 µg/l	—	Mean
Chlorate	nicht nachweisbar mg/l not detectable	70 µg/l	—	Mean
Chlorite	nicht nachweisbar mg/l not detectable	0.2 mg/l	—	Mean
Chromium	nicht nachweisbar mg/l not detectable	25 µg/l	—	Mean
Copper	nicht nachweisbar mg/l not detectable	2 mg/l	—	Mean
Cyanide	nicht nachweisbar mg/l not detectable	50 µg/l	—	Mean
Fluoride	0,11 mg/l	1.5 mg/l	7 %	Mean
Lead	nicht nachweisbar mg/l not detectable	10 µg/l	—	Mean
Mercury	nicht nachweisbar mg/l not detectable	1 µg/l	—	Mean
Nickel	nicht nachweisbar mg/l not detectable	20 µg/l	—	Mean
Nitrate	9,2 mg/l	50 mg/l	18 %	Mean
Nitrite	nicht nachweisbar mg/l not detectable	0.5 mg/l	—	Mean
Polycyclic aromatic hydrocarbons	nicht nachweisbar µg/l not detectable	0.1 µg/l	—	Mean
Selenium	nicht nachweisbar mg/l not detectable	10 µg/l	—	Mean
Tetrachloroethene and Trichloroethene (sum)	nicht nachweisbar µg/l not detectable	10 µg/l	—	Mean
Trihalomethanes — Total	nicht nachweisbar µg/l not detectable	50 µg/l	—	Mean
Uranium	nicht nachweisbar mg/l not detectable	10 µg/l	—	Mean

Indicator parameters (18)

Indicator parameters – Verbundwasserwerk Essen
Parameter	Value	Parametric value	Share of the parametric value	Reference
Aluminium	nicht nachweisbar mg/l not detectable	0.2 mg/l	—	Mean
Ammonium	nicht nachweisbar mg/l not detectable	0.5 mg/l	—	Mean
Calcite dissolution capacity	eingehalten mg/l	5 mg/l CaCO3	—	Mean
Chloride	55,0 mg/l	250 mg/l	22 %	Mean
Clostridium perfringens (including spores)	0,0 /100 ml	0/100 ml	—	Mean
Coliform bacteria	0,0 /100 ml	0/100 ml	—	Mean
Colony count 22 °C	0,0 /ml	ohne anormale Veränderung	—	Mean
Colony count 36 °C	0,0 /ml	ohne anormale Veränderung	—	Mean
Colour	nicht nachweisbar m–1 not detectable	0.5 m⁻¹	—	Mean
Conductivity (25 °C)	491,0 μS/cm	2,790 µS/cm	—	Mean
Iron	nicht nachweisbar mg/l not detectable	0.2 mg/l	—	Mean
Manganese	nicht nachweisbar mg/l not detectable	50 µg/l	—	Mean
pH	7,9 —	6,5–9,5	—	Mean
Sodium	41,0 mg/l	200 mg/l	21 %	Mean
Sulphate	42,0 mg/l	250 mg/l	17 %	Mean
Temperature	14,1 °C	—	—	Mean
Total organic carbon (TOC)	0,8 mg/l	ohne anormale Veränderung	—	Mean
Turbidity	nicht nachweisbar FNU not detectable	1 NTU	—	Mean

Further parameters (11)

Further parameters – Verbundwasserwerk Essen
Parameter	Value	Parametric value	Share of the parametric value	Reference
Acid capacity to pH 4.3	2,2 mmol/l	—	—	Mean
Base capacity to pH 8.2	0,06 mmol/l	—	—	Mean
Calcium	42,0 mg/l	—	—	Mean
Carbonate hardness	6,2 °dH	—	—	Mean
Hardness range (WRMG)	weich —	—	—	Mean
Magnesium	7,9 mg/l	—	—	Mean
Oxygen	10,5 mg/l	—	—	Mean
Phosphate	0,23 mg/l	—	—	Mean
Potassium	4,4 mg/l	—	—	Mean
Silicate / silicic acid	4,9 mg/l	—	—	Mean
Total hardness	7,7 °dH	—	—	Mean

Source: https://www.stadtwerke-hattingen.de/de/Privatkunden/Netze/Wassernetz/Trinkwasseranalyse.pdf · 2025 · retrieved on 13/07/2026

Versorgungsgebiet der Stadtwerke Essen AG (Herkunft des Trinkwassers: Verbundwasserwerk Essen, Wassergewinnung Essen GmbH)

Gelsenwasser

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

Water hardness

Hardness range 1,38

Key values Versorgungsgebiet der Stadtwerke Essen AG (Herkunft des Trinkwassers: Verbundwasserwerk Essen, Wassergewinnung Essen GmbH)
Parameter	Value	Parametric value	Share of the parametric value	Reference
Nitrate	9 mg/l	50 mg/l	18 %	Median
Sulphate	42 mg/l	250 mg/l	17 %	Median
Sodium	41 mg/l	200 mg/l	21 %	Median

Show all recorded parameters (17 — most recent value per parameter)

Chemical parameters (1)

Chemical parameters – Versorgungsgebiet der Stadtwerke Essen AG (Herkunft des Trinkwassers: Verbundwasserwerk Essen, Wassergewinnung Essen GmbH)
Parameter	Value	Parametric value	Share of the parametric value	Reference
Nitrate	9 mg/l	50 mg/l	18 %	Median

Indicator parameters (8)

Indicator parameters – Versorgungsgebiet der Stadtwerke Essen AG (Herkunft des Trinkwassers: Verbundwasserwerk Essen, Wassergewinnung Essen GmbH)
Parameter	Value	Parametric value	Share of the parametric value	Reference
Calcite dissolution capacity	0,8 mg/l	5 mg/l CaCO3	—	Median
Chloride	55 mg/l	250 mg/l	22 %	Median
Conductivity (25 °C)	491 µS/cm	2,790 µS/cm	—	Median
pH	7,90	6,5–9,5	—	Median
Sodium	41 mg/l	200 mg/l	21 %	Median
Sulphate	42 mg/l	250 mg/l	17 %	Median
Temperature	14,1 °C	—	—	Median
Total organic carbon (TOC)	0,8 mg/l	ohne anormale Veränderung	—	Median

Further parameters (8)

Further parameters – Versorgungsgebiet der Stadtwerke Essen AG (Herkunft des Trinkwassers: Verbundwasserwerk Essen, Wassergewinnung Essen GmbH)
Parameter	Value	Parametric value	Share of the parametric value	Reference
Acid capacity to pH 4.3	2,20 mmol/l	—	—	Median
Base capacity to pH 8.2	0,06 mmol/l	—	—	Median
Calcium	42 mg/l	—	—	Median
Hardness range (WRMG)	1,38 mmol/l	—	—	Median
Magnesium	7,9 mg/l	—	—	Median
Oxygen	10,5 mg/l	—	—	Median
Potassium	4,4 mg/l	—	—	Median
Silicate / silicic acid	2,3 mg/l	—	—	Median

Source: https://www.gelsenwasser.de/fileadmin/Gelsenwasser/80_footer/8.1-tw_parameter/essen_inst.pdf · Median 2025 (Jahresmittelwert) · retrieved on 13/07/2026

Wasserwerk Haltern

Gelsenwasser

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

Water hardness

Hardness range 2,02

Key values Wasserwerk Haltern
Parameter	Value	Parametric value	Share of the parametric value	Reference
Nitrate	12 mg/l	50 mg/l	24 %	Median
Sulphate	48 mg/l	250 mg/l	19 %	Median
Sodium	19 mg/l	200 mg/l	9 %	Median

Show all recorded parameters (17 — most recent value per parameter)

Chemical parameters (1)

Chemical parameters – Wasserwerk Haltern
Parameter	Value	Parametric value	Share of the parametric value	Reference
Nitrate	12 mg/l	50 mg/l	24 %	Median

Indicator parameters (8)

Indicator parameters – Wasserwerk Haltern
Parameter	Value	Parametric value	Share of the parametric value	Reference
Calcite dissolution capacity	0,2 mg/l	5 mg/l CaCO3	—	Median
Chloride	26 mg/l	250 mg/l	10 %	Median
Conductivity (25 °C)	487 µS/cm	2,790 µS/cm	—	Median
pH	7,55	6,5–9,5	—	Median
Sodium	19 mg/l	200 mg/l	9 %	Median
Sulphate	48 mg/l	250 mg/l	19 %	Median
Temperature	13,3 °C	—	—	Median
Total organic carbon (TOC)	3,0 mg/l	ohne anormale Veränderung	—	Median

Further parameters (8)

Further parameters – Wasserwerk Haltern
Parameter	Value	Parametric value	Share of the parametric value	Reference
Acid capacity to pH 4.3	2,97 mmol/l	—	—	Median
Base capacity to pH 8.2	0,21 mmol/l	—	—	Median
Calcium	73 mg/l	—	—	Median
Hardness range (WRMG)	2,02 mmol/l	—	—	Median
Magnesium	4,8 mg/l	—	—	Median
Oxygen	6,9 mg/l	—	—	Median
Potassium	5,3 mg/l	—	—	Median
Silicate / silicic acid	4,0 mg/l	—	—	Median

Source: https://www.gelsenwasser.de/fileadmin/Gelsenwasser/80_footer/8.1-tw_parameter/haltern_inst.pdf · 2025 · retrieved on 25/07/2026

Wasserwerk Haltern, Gelsenwasser AG

Gelsenwasser

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

Water hardness

Hardness range 2,02

Key values Wasserwerk Haltern, Gelsenwasser AG
Parameter	Value	Parametric value	Share of the parametric value	Reference
Nitrate	12 mg/l	50 mg/l	24 %	Median
Sulphate	48 mg/l	250 mg/l	19 %	Median
Sodium	19 mg/l	200 mg/l	9 %	Median

Show all recorded parameters (17 — most recent value per parameter)

Chemical parameters (1)

Chemical parameters – Wasserwerk Haltern, Gelsenwasser AG
Parameter	Value	Parametric value	Share of the parametric value	Reference
Nitrate	12 mg/l	50 mg/l	24 %	Median

Indicator parameters (8)

Indicator parameters – Wasserwerk Haltern, Gelsenwasser AG
Parameter	Value	Parametric value	Share of the parametric value	Reference
Calcite dissolution capacity	0,2 mg/l	5 mg/l CaCO3	—	Median
Chloride	26 mg/l	250 mg/l	10 %	Median
Conductivity (25 °C)	487 µS/cm	2,790 µS/cm	—	Median
pH	7,55	6,5–9,5	—	Median
Sodium	19 mg/l	200 mg/l	9 %	Median
Sulphate	48 mg/l	250 mg/l	19 %	Median
Temperature	13,3 °C	—	—	Median
Total organic carbon (TOC)	3,0 mg/l	ohne anormale Veränderung	—	Median

Further parameters (8)

Further parameters – Wasserwerk Haltern, Gelsenwasser AG
Parameter	Value	Parametric value	Share of the parametric value	Reference
Acid capacity to pH 4.3	2,97 mmol/l	—	—	Median
Base capacity to pH 8.2	0,21 mmol/l	—	—	Median
Calcium	73 mg/l	—	—	Median
Hardness range (WRMG)	2,02 mmol/l	—	—	Median
Magnesium	4,8 mg/l	—	—	Median
Oxygen	6,9 mg/l	—	—	Median
Potassium	5,3 mg/l	—	—	Median
Silicate / silicic acid	4,0 mg/l	—	—	Median

Source: https://www.gelsenwasser.de/fileadmin/Gelsenwasser/80_footer/8.1-tw_parameter/haltern_inst.pdf · 2025 · retrieved on 25/07/2026

Wasserwerk Echthausen Ortsteile Hemmerde, Lünern, Siddinghausen, Westhemmerde (Mischwasser)

Gelsenwasser

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

No date is given for these values. The water supplier publishes the analysis without a sampling date and without a report date. When the water was examined is not apparent from the source — we do not add a date and we do not estimate one. What is stated is therefore only when we retrieved the document.

Water hardness

Hardness range weich

No core values are available for this zone yet.

Show all recorded parameters (1 — most recent value per parameter)

Further parameters (1)

Further parameters – Wasserwerk Echthausen Ortsteile Hemmerde, Lünern, Siddinghausen, Westhemmerde (Mischwasser)
Parameter	Value	Parametric value	Share of the parametric value	Reference
Hardness range (WRMG)	weich	—	—	Single value · Wasserwerk Echthausen – Ortsteile Hemmerde, Lünern, Siddinghausen, Westhemmerde (Mischwasser)

Source: https://www.gelsenwasser.de/wasser/wasserhaerte/unna · retrieved on 11/07/2026

Wasserwerk Halingen/Fröndenberg Ortsteile Hemmerde, Lünern, Siddinghausen, Westhemmerde (Mischwasser)

Gelsenwasser

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

Water hardness

Hardness range weich

No core values are available for this zone yet.

Show all recorded parameters (1 — most recent value per parameter)

Further parameters (1)

Further parameters – Wasserwerk Halingen/Fröndenberg Ortsteile Hemmerde, Lünern, Siddinghausen, Westhemmerde (Mischwasser)
Parameter	Value	Parametric value	Share of the parametric value	Reference
Hardness range (WRMG)	weich	—	—	Single value · Wasserwerk Halingen/Fröndenberg – Ortsteile Hemmerde, Lünern, Siddinghausen, Westhemmerde (Mischwasser)

Source: https://www.gelsenwasser.de/wasser/wasserhaerte/unna · retrieved on 11/07/2026

Wasserwerk Halingen/Fröndenberg Übriges Stadtgebiet Unna

Gelsenwasser

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

Water hardness

Hardness range weich

No core values are available for this zone yet.

Show all recorded parameters (1 — most recent value per parameter)

Further parameters (1)

Further parameters – Wasserwerk Halingen/Fröndenberg Übriges Stadtgebiet Unna
Parameter	Value	Parametric value	Share of the parametric value	Reference
Hardness range (WRMG)	weich	—	—	Single value · Wasserwerk Halingen/Fröndenberg – Übriges Stadtgebiet Unna

Source: https://www.gelsenwasser.de/wasser/wasserhaerte/unna · retrieved on 11/07/2026

Frequent questions about postcode 45527

How hard is the water in Postcode 45527?: Gelsenwasser publishes a total hardness of 7.7 °dH for the supply zone Verbundwasserwerk Essen; Entnahmestelle: Trinkwasser Essen nach UV Ltg. Überruhr, WAA 2 (00-0350) (hardness range weich). 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 45527?: Gelsenwasser publishes a nitrate value of 9,2 mg/l for the supply zone Verbundwasserwerk Essen; Entnahmestelle: Trinkwasser Essen nach UV Ltg. Überruhr, WAA 2 (00-0350). The statutory parametric value is 50 mg/l; the measured value represents 18 % of the parametric value. Basis: Publication by the water supplier, retrieved on 11/07/2026.
Who supplies the drinking water in Postcode 45527?: Gelsenwasser. The values shown here come from the supply zone Verbundwasserwerk Essen; Entnahmestelle: Trinkwasser Essen nach UV Ltg. Überruhr, WAA 2 (00-0350) 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.