How much nitrate is in the drinking water in Merzig?

Stadtwerke Merzig GmbH publishes a nitrate value of 17,42 mg/l for the supply zone Merzig. The statutory parametric value is 50 mg/l; the measured value represents 35 % of the parametric value. Basis: 12/2025, retrieved on 11/07/2026.

Who supplies the drinking water in Merzig?

Stadtwerke Merzig GmbH. The values shown here come from the supply zone Merzig 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 Merzig

One supply zone, water supplier: Stadtwerke Merzig 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.

Merzig

Stadtwerke Merzig GmbH

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

Key values Merzig
Parameter	Value	Parametric value	Share of the parametric value	Reference
Nitrate	17,42 mg/l	50 mg/l	35 %	Single value · Merzig
Sulphate	8,5 mg/l	250 mg/l	3 %	Single value · Merzig
Sodium	5,64 mg/l	200 mg/l	3 %	Single value · Merzig

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

Chemical parameters (2)

Chemical parameters – Merzig
Parameter	Value	Parametric value	Share of the parametric value	Reference
Nitrate	17,42 mg/l	50 mg/l	35 %	Single value · Merzig
Nitrite	< 0,005 mg/l below limit of quantification	0.5 mg/l	< 1 % *	Single value · Merzig

* 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 (3)

Indicator parameters – Merzig
Parameter	Value	Parametric value	Share of the parametric value	Reference
Chloride	16,42 mg/l	250 mg/l	7 %	Single value · Merzig
Sodium	5,64 mg/l	200 mg/l	3 %	Single value · Merzig
Sulphate	8,5 mg/l	250 mg/l	3 %	Single value · Merzig

Further parameters (3)

Further parameters – Merzig
Parameter	Value	Parametric value	Share of the parametric value	Reference
Calcium	28,12 mg/l	—	—	Single value · Merzig
Magnesium	13,52 mg/l	—	—	Single value · Merzig
Potassium	3,36 mg/l	—	—	Single value · Merzig

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.stadtwerke-merzig.de/privatkunden/wasser/wasserqualitaet.html · 12/2025 · retrieved on 11/07/2026

Postcodes in this zone: 66663

Frequently asked questions about drinking water in Merzig

How much nitrate is in the drinking water in Merzig?: Stadtwerke Merzig GmbH publishes a nitrate value of 17,42 mg/l for the supply zone Merzig. The statutory parametric value is 50 mg/l; the measured value represents 35 % of the parametric value. Basis: 12/2025, retrieved on 11/07/2026.
Who supplies the drinking water in Merzig?: Stadtwerke Merzig GmbH. The values shown here come from the supply zone Merzig 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.