How hard is the water in Nottuln?

Gemeindewerke Nottuln publishes a total hardness of 10.5 °dH for the supply zone Vorjahr (hardness range medium). 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: Nottuln, 26. Februar 2026, retrieved on 11/07/2026.

How much nitrate is in the drinking water in Nottuln?

Gemeindewerke Nottuln publishes a nitrate value of 4,0 mg/l for the supply zone Vorjahr. The statutory parametric value is 50 mg/l; the measured value represents 8 % of the parametric value. Basis: Nottuln, 26. Februar 2026, retrieved on 11/07/2026.

Who supplies the drinking water in Nottuln?

Gemeindewerke Nottuln. The values shown here come from the supply zone Vorjahr 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 Nottuln

2 supply zones — values can differ depending on the district. Below is the zone with the most documented parameters, the others collapsed underneath. To determine the exact match, look up the postcode.

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.

Vorjahr

Gemeindewerke Nottuln

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

Water hardness

10.5 °dH

Hardness range medium

Key values Vorjahr
Parameter	Value	Parametric value	Share of the parametric value	Reference
Sum of PFAS	13 ng/l	—	—	Mean · Vorjahr
Nitrate	4,0 mg/l	50 mg/l	8 %	Mean · Vorjahr
Escherichia coli (E. coli)	0 KBE/100 ml	0/100 ml	—	Mean · Vorjahr
Sulphate	49,5 mg/l	250 mg/l	20 %	Mean · Vorjahr
Sodium	25 mg/l	200 mg/l	13 %	Mean · Vorjahr

Show all recorded parameters (25 — most recent value per parameter)

Microbiology (1)

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

Chemical parameters (3)

Chemical parameters – Vorjahr
Parameter	Value	Parametric value	Share of the parametric value	Reference
Fluoride	<0,2 mg/l below limit of quantification	1.5 mg/l	< 13 % *	Mean · Vorjahr
Nitrate	4,0 mg/l	50 mg/l	8 %	Mean · Vorjahr
Nitrite	<0,05 mg/l below limit of quantification	0.5 mg/l	< 10 % *	Mean · Vorjahr

* 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 (2)

PFAS – Vorjahr
Parameter	Value	Parametric value	Share of the parametric value	Reference
Sum of 4 PFAS	5 ng/l	—	—	Mean · Vorjahr
Sum of PFAS	13 ng/l	—	—	Mean · Vorjahr

Indicator parameters (15)

Indicator parameters – Vorjahr
Parameter	Value	Parametric value	Share of the parametric value	Reference
Aluminium	<0,05 mg/l below limit of quantification	0.2 mg/l	< 25 % *	Mean · Vorjahr
Chloride	21,5 mg/l	250 mg/l	9 %	Mean · Vorjahr
Clostridium perfringens (including spores)	0 KBE/100 ml	0/100 ml	—	Mean · Vorjahr
Coliform bacteria	0 KBE/100 ml	0/100 ml	—	Mean · Vorjahr
Colony count 22 °C	0 KBE/ml	ohne anormale Veränderung	—	Mean · Vorjahr
Colony count 36 °C	0 KBE/ml	ohne anormale Veränderung	—	Mean · Vorjahr
Iron	<0,05 mg/l below limit of quantification	0.2 mg/l	< 25 % *	Mean · Vorjahr
Manganese	<0,01 mg/l below limit of quantification	50 µg/l	< 20 % *	Mean · Vorjahr
Odour	geruchlos -	für den Verbraucher annehmbar	—	Mean · Vorjahr
pH	7,9 -	6,5–9,5	—	Mean · Vorjahr
Sodium	25 mg/l	200 mg/l	13 %	Mean · Vorjahr
Sulphate	49,5 mg/l	250 mg/l	20 %	Mean · Vorjahr
Temperature	11,5 °C	—	—	Mean · Vorjahr
Total organic carbon (TOC)	1,3 mg/l	ohne anormale Veränderung	—	Mean · Vorjahr
Turbidity	keine FNU	1 NTU	—	Mean · Vorjahr

Further parameters (4)

Further parameters – Vorjahr
Parameter	Value	Parametric value	Share of the parametric value	Reference
Calcium	51 mg/l	—	—	Mean · Vorjahr
Magnesium	16 mg/l	—	—	Mean · Vorjahr
Potassium	5,9 mg/l	—	—	Mean · Vorjahr
Total hardness	10,5 °dH	—	—	Mean · Vorjahr

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.nottuln.de/fileadmin/media/PDF/Fachbereich_4/Wasserwerk/Durchschnittsanalyse_2025.pdf · Nottuln, 26. Februar 2026 · Jahresmittelwerte 2025 (mit Vorjahresvergleich) · retrieved on 11/07/2026

Postcodes in this zone: 48301

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Wasserwerk Nottuln