How hard is the water in Altenberg bei Linz?

Wasserversorgung Grellingen publishes a total hardness of 26.6 °fH for the supply zone Grellingen — that corresponds to 14.9 °dH. 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: 2025, retrieved on 07/08/2026.

How much nitrate is in the drinking water in Altenberg bei Linz?

Wasserversorgung Grellingen publishes a nitrate value of 14.9 mg/l for the supply zone Grellingen. The statutory parametric value is 40 mg/l; the measured value represents 37 % of the parametric value. Basis: 2025, retrieved on 07/08/2026.

Who supplies the drinking water in Altenberg bei Linz?

Wasserversorgung Grellingen. The values shown here come from the supply zone Grellingen 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 Altenberg bei Linz

One supply zone, water supplier: Wasserversorgung Grellingen.

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.

Grellingen

Wasserversorgung Grellingen

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

Water hardness

14.9 °dH

Hardness range hard

Key values Grellingen
Parameter	Value	Parametric value	Share of the parametric value	Reference
Nitrate	14.9 mg/l	40 mg/l	37 %	Mean · Grellingen
Escherichia coli (E. coli)	nn not detectable Unit not stated in the document	0/100 ml	—	Maximum · Median nn · Grellingen
Sulphate	16.9 mg/l	—	—	Mean · Grellingen
Sodium	7.88 mg/l	200 mg/l	4 %	Mean · Grellingen

Show all recorded parameters (16 — most recent value per parameter)

Microbiology (3)

Microbiology – Grellingen
Parameter	Value	Parametric value	Share of the parametric value	Reference
Aerobic mesophilic bacteria	19.93 KBE/ml	300 1/ml	—	Mean · Grellingen
Escherichia coli (E. coli)	nn not detectable Unit not stated in the document	0/100 ml	—	Maximum · Median nn · Grellingen
Intestinal enterococci	nn not detectable Unit not stated in the document	0/100 ml	—	Maximum · Median nn · Grellingen

Chemical parameters (2)

Chemical parameters – Grellingen
Parameter	Value	Parametric value	Share of the parametric value	Reference
Fluoride	0.05 mg/l	1.5 mg/l	3 %	Mean · Grellingen
Nitrate	14.9 mg/l	40 mg/l	37 %	Mean · Grellingen

Indicator parameters (7)

Indicator parameters – Grellingen
Parameter	Value	Parametric value	Share of the parametric value	Reference
Chloride	11.7 mg/l	—	—	Mean · Grellingen
Conductivity (25 °C)	531 µS/cm	—	—	Mean · Grellingen
pH	7.45	—	—	Mean · Grellingen
Sodium	7.88 mg/l	200 mg/l	4 %	Mean · Grellingen
Sulphate	16.9 mg/l	—	—	Mean · Grellingen
Temperature	13.88 °C	—	—	Mean · Grellingen
Turbidity	0.05 TE/F	—	—	Mean · Grellingen

Further parameters (4)

Further parameters – Grellingen
Parameter	Value	Parametric value	Share of the parametric value	Reference
Calcium	99.1 mg/l	—	—	Mean · Grellingen
Magnesium	4.44 mg/l	—	—	Mean · Grellingen
Potassium	2.26 mg/l	—	—	Mean · Grellingen
Total hardness	26.6 °fH	—	—	Mean · Grellingen

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://trinkwasser.ch/de/versorger/956/wasserversorgung-grellingen/3453/grellingen · 2025 · 2025 · retrieved on 07/08/2026

Postcodes in this zone: 4203

Frequently asked questions about drinking water in Altenberg bei Linz

How hard is the water in Altenberg bei Linz?: Wasserversorgung Grellingen publishes a total hardness of 26.6 °fH for the supply zone Grellingen — that corresponds to 14.9 °dH. 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: 2025, retrieved on 07/08/2026.
How much nitrate is in the drinking water in Altenberg bei Linz?: Wasserversorgung Grellingen publishes a nitrate value of 14.9 mg/l for the supply zone Grellingen. The statutory parametric value is 40 mg/l; the measured value represents 37 % of the parametric value. Basis: 2025, retrieved on 07/08/2026.
Who supplies the drinking water in Altenberg bei Linz?: Wasserversorgung Grellingen. The values shown here come from the supply zone Grellingen 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.