Who supplies the drinking water in Postcode 58091?

Mark -E AG. The values shown here come from the supply zone Hengstey 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 58091

For this postcode Mark -E AG 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.

Hengstey

Mark -E AG

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

Key values Hengstey
Parameter	Value	Parametric value	Share of the parametric value	Reference
Nitrate	9,9 mg / I	50 mg/l	—	Mean
Lead	<0,001 mg / I below limit of quantification	10 µg/l	—	Mean
Sulphate	33 mg / I	250 mg/l	—	Mean
Sodium	29,6 mg / I	200 mg/l	—	Mean

Show all recorded parameters (41 — most recent value per parameter)

Microbiology (1)

Microbiology – Hengstey
Parameter	Value	Parametric value	Share of the parametric value	Reference
Intestinal enterococci	0 / 100 ml	0/100 ml	—	Mean

Chemical parameters (18)

Chemical parameters – Hengstey
Parameter	Value	Parametric value	Share of the parametric value	Reference
1,2-dichloroethane	<0,0005 mg / I below limit of quantification	3 µg/l	—	Mean
Antimony	<0,001 mg / I below limit of quantification	5 µg/l	—	Mean
Arsenic	<0,001 mg / I below limit of quantification	10 µg/l	—	Mean
Benzene	<0,0002 mg / I below limit of quantification	1 µg/l	—	Mean
Benzo(a)pyrene	<0,000001 mg / I below limit of quantification	10 ng/l	—	Mean
Boron	0,04 mg / I	1 mg/l	—	Mean
Cadmium	<0,0001 mg / I below limit of quantification	3 µg/l	—	Mean
Chromium	<0,001 mg / I below limit of quantification	25 µg/l	—	Mean
Copper	<0,001 mg / I below limit of quantification	2 mg/l	—	Mean
Cyanide	<0,01 mg / I below limit of quantification	50 µg/l	—	Mean
Fluoride	0,09 mg/l	1.5 mg/l	6 %	Mean
Lead	<0,001 mg / I below limit of quantification	10 µg/l	—	Mean
Mercury	<0,0001 mg / I below limit of quantification	1 µg/l	—	Mean
Nickel	<0,002 mg / I below limit of quantification	20 µg/l	—	Mean
Nitrate	9,9 mg / I	50 mg/l	—	Mean
Nitrite	<0,01 mg / I below limit of quantification	0.5 mg/l	—	Mean
Selenium	<0,0005 mg / I below limit of quantification	10 µg/l	—	Mean
Uranium	<0,001 mg / I below limit of quantification	10 µg/l	—	Mean

Indicator parameters (13)

Indicator parameters – Hengstey
Parameter	Value	Parametric value	Share of the parametric value	Reference
Aluminium	<0,01 mg / I below limit of quantification	0.2 mg/l	—	Mean
Ammonium	<0,01 mg / I below limit of quantification	0.5 mg/l	—	Mean
Chloride	36 mg / I	250 mg/l	—	Mean
Clostridium perfringens (including spores)	0 / 100 ml	0/100 ml	—	Mean
Iron	<0,01 mg / I below limit of quantification	0.2 mg/l	—	Mean
Manganese	<0,01 mg / I below limit of quantification	50 µg/l	—	Mean
Odour	0	für den Verbraucher annehmbar	—	Mean
Sodium	29,6 mg / I	200 mg/l	—	Mean
Sulphate	33 mg / I	250 mg/l	—	Mean
Taste	0	für den Verbraucher annehmbar	—	Mean
Temperature	13,8 °C	—	—	Mean
Total organic carbon (TOC)	0,7 mg/l	ohne anormale Veränderung	—	Mean
Turbidity	0,06 FNU	1 NTU	—	Mean

Further parameters (9)

Further parameters – Hengstey
Parameter	Value	Parametric value	Share of the parametric value	Reference
Acid capacity to pH 4.3	2,19 mmol / I	—	—	Mean
Base capacity to pH 8.2	0,07 mmol / I	—	—	Mean
Calcium	40,5 mg / I	—	—	Mean
Dissolved organic carbon (DOC)	0,7 mg/l	—	—	Mean
Magnesium	6,4 mg / I	—	—	Mean
Phosphate	1,25 mg / I	—	—	Mean
Potassium	3,1 mg / I	—	—	Mean
Silicate / silicic acid	4,82 mg / I	—	—	Mean
Sum of alkaline earth metals	1,27 mmol / I	—	—	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://a.storyblok.com/f/320707/x/21b19e87e2/trinkwasseranalyse-jahresmittelwerte-wasserwerk-hengstey-2025.pdf · Jahresmittelwert 2025 · retrieved on 11/07/2026

Show 1 more supply zone in this postcode

Haspe

Mark -E AG

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

Key values Haspe
Parameter	Value	Parametric value	Share of the parametric value	Reference
Nitrate	9,1 mg / I	50 mg/l	—	Mean
Lead	<0,001 mg / I below limit of quantification	10 µg/l	—	Mean
Sulphate	17 mg / I	250 mg/l	—	Mean
Sodium	6,9 mg / I	200 mg/l	—	Mean

Show all recorded parameters (41 — most recent value per parameter)

Microbiology (1)

Microbiology – Haspe
Parameter	Value	Parametric value	Share of the parametric value	Reference
Intestinal enterococci	0 / 100 ml	0/100 ml	—	Mean

Chemical parameters (18)

Chemical parameters – Haspe
Parameter	Value	Parametric value	Share of the parametric value	Reference
1,2-dichloroethane	<0,0005 mg / I below limit of quantification	3 µg/l	—	Mean
Antimony	<0,0005 mg / I below limit of quantification	5 µg/l	—	Mean
Arsenic	<0,0001 mg / I below limit of quantification	10 µg/l	—	Mean
Benzene	<0,0002 mg / I below limit of quantification	1 µg/l	—	Mean
Benzo(a)pyrene	<0,000001 mg / I below limit of quantification	10 ng/l	—	Mean
Boron	0,01 mg / I	1 mg/l	—	Mean
Cadmium	<0,0001 mg / I below limit of quantification	3 µg/l	—	Mean
Chromium	<0,0005 mg / I below limit of quantification	25 µg/l	—	Mean
Copper	<0,001 mg / I below limit of quantification	2 mg/l	—	Mean
Cyanide	<0,01 mg / I below limit of quantification	50 µg/l	—	Mean
Fluoride	0,08 mg/l	1.5 mg/l	5 %	Mean
Lead	<0,001 mg / I below limit of quantification	10 µg/l	—	Mean
Mercury	<0,0001 mg / I below limit of quantification	1 µg/l	—	Mean
Nickel	<0,002 mg / I below limit of quantification	20 µg/l	—	Mean
Nitrate	9,1 mg / I	50 mg/l	—	Mean
Nitrite	<0,01 mg / I below limit of quantification	0.5 mg/l	—	Mean
Selenium	<0,0005 mg / I below limit of quantification	10 µg/l	—	Mean
Uranium	<0,001 mg / I below limit of quantification	10 µg/l	—	Mean

Indicator parameters (13)

Indicator parameters – Haspe
Parameter	Value	Parametric value	Share of the parametric value	Reference
Aluminium	<0,01 mg / I below limit of quantification	0.2 mg/l	—	Mean
Ammonium	<0,01 mg / I below limit of quantification	0.5 mg/l	—	Mean
Chloride	14 mg / I	250 mg/l	—	Mean
Clostridium perfringens (including spores)	0 / 100 ml	0/100 ml	—	Mean
Iron	<0,01 mg / I below limit of quantification	0.2 mg/l	—	Mean
Manganese	<0,01 mg / I below limit of quantification	50 µg/l	—	Mean
Odour	0	für den Verbraucher annehmbar	—	Mean
Sodium	6,9 mg / I	200 mg/l	—	Mean
Sulphate	17 mg / I	250 mg/l	—	Mean
Taste	0	für den Verbraucher annehmbar	—	Mean
Temperature	11,7 °C	—	—	Mean
Total organic carbon (TOC)	1,1 mg/l	ohne anormale Veränderung	—	Mean
Turbidity	0,06 FNU	1 NTU	—	Mean

Treatment substances (1)

Treatment substances – Haspe
Parameter	Value	Parametric value	Share of the parametric value	Reference
Chlorine dioxide	0,13 mg / I	—	—	Mean

Further parameters (8)

Further parameters – Haspe
Parameter	Value	Parametric value	Share of the parametric value	Reference
Acid capacity to pH 4.3	1,0 mmol / I	—	—	Mean
Base capacity to pH 8.2	nicht untersucht mmol / I not determined	—	—	Mean
Calcium	0,8 mg / I	—	—	Mean
Dissolved organic carbon (DOC)	1,1 mg/l	—	—	Mean
Magnesium	3,6 mg / I	—	—	Mean
Phosphate	1,1 mg / I	—	—	Mean
Potassium	1,4 mg / I	—	—	Mean
Sum of alkaline earth metals	0,75 mmol / I	—	—	Mean

Source: https://a.storyblok.com/f/320707/x/1dd571504f/trinkwasseranalyse-jahresmittelwerte-wasserwerk-haspertalsperre-2025.pdf · Jahresmittelwert 2025 · retrieved on 11/07/2026

Frequent questions about postcode 58091

Who supplies the drinking water in Postcode 58091?: Mark -E AG. The values shown here come from the supply zone Hengstey 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.