How much nitrate is in the drinking water in Ratingen?

Stadtwerke Ratingen publishes a nitrate value of 6,5 mg/l for the supply zone Netz Homberg. The statutory parametric value is 50 mg/l; the measured value represents 13 % of the parametric value. Basis: Publication by the water supplier, retrieved on 11/07/2026.

Who supplies the drinking water in Ratingen?

Stadtwerke Ratingen. The values shown here come from the supply zone Netz Homberg 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 Ratingen

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.

Netz Homberg

Stadtwerke Ratingen

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

Key values Netz Homberg
Parameter	Value	Parametric value	Share of the parametric value	Reference
Nitrate	6,5 mg/l	50 mg/l	13 %	Single value · Netz Homberg
Sodium	10,5 mg/l	200 mg/l	5 %	Single value · Netz Homberg

Show all recorded parameters (8 — most recent value per parameter)

Chemical parameters (2)

Chemical parameters – Netz Homberg
Parameter	Value	Parametric value	Share of the parametric value	Reference
Nitrate	6,5 mg/l	50 mg/l	13 %	Single value · Netz Homberg
Nitrite	<0,020 mg/l below limit of quantification	0.5 mg/l	< 4 % *	Single value · Netz Homberg

* 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.

Indicator parameters (4)

Indicator parameters – Netz Homberg
Parameter	Value	Parametric value	Share of the parametric value	Reference
Ammonium	<0,020 mg/l below limit of quantification	0.5 mg/l	< 4 % *	Single value · Netz Homberg
Chloride	27,3 mg/l	250 mg/l	11 %	Single value · Netz Homberg
Iron	0,006 mg/l	0.2 mg/l	3 %	Single value · Netz Homberg
Sodium	10,5 mg/l	200 mg/l	5 %	Single value · Netz Homberg

Further parameters (2)

Further parameters – Netz Homberg
Parameter	Value	Parametric value	Share of the parametric value	Reference
Calcium	110,4 mg/l	—	—	Single value · Netz Homberg
Magnesium	28,0 mg/l	—	—	Single value · Netz Homberg

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: ratingen-ff3aa2a6.html · 2025 · retrieved on 11/07/2026

Postcodes in this zone: 40878 , 40880 , 40882 , 40883 , 40885

Show 1 more supply zone

Netz Ratingen