How hard is the water in Leonding, Wilhering?

Stadt Leonding / Linz AG Wasser publishes a total hardness of 16.2 °dH for the supply zone Leonding (hardness range hard). 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: Publication by the water supplier, retrieved on 14/08/2026.

How much nitrate is in the drinking water in Leonding, Wilhering?

Stadt Leonding / Linz AG Wasser publishes a nitrate value of 18,9 mg/l for the supply zone Leonding. The statutory parametric value is 50 mg/l; the measured value represents 38 % of the parametric value. Basis: Publication by the water supplier, retrieved on 14/08/2026.

Who supplies the drinking water in Leonding, Wilhering?

Stadt Leonding / Linz AG Wasser. The values shown here come from the supply zone Leonding 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 Leonding, Wilhering

One supply zone, water supplier: Stadt Leonding / Linz AG Wasser.

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.

Leonding

Stadt Leonding / Linz AG Wasser

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

Water hardness

16.2 °dH

Hardness range hard

Key values Leonding
Parameter	Value	Parametric value	Share of the parametric value	Reference
Nitrate	18,9 mg/l	50 mg/l	38 %	Maximum
Sulphate	28,2 mg/l	250 mg/l	11 %	Maximum
Sodium	12,4 mg/l	200 mg/l	6 %	Maximum

Show all recorded parameters (15 — most recent value per parameter)

Chemical parameters (2)

Chemical parameters – Leonding
Parameter	Value	Parametric value	Share of the parametric value	Reference
Nitrate	18,9 mg/l	50 mg/l	38 %	Maximum
Nitrite	n.n. mg/l not detectable	0.1 mg/l	—	Maximum

Indicator parameters (8)

Indicator parameters – Leonding
Parameter	Value	Parametric value	Share of the parametric value	Reference
Ammonium	n.n mg/l not detectable	0.5 mg/l	—	Maximum
Chloride	24,6 mg/l	200 mg/l	12 %	Maximum
Conductivity (25 °C)	502 µS/cm	2,500 µS/cm	—	Maximum
Iron	n.n mg/l not detectable	0.2 mg/l	—	Maximum
Manganese	n.n. mg/l not detectable	50 µg/l	—	Maximum
pH	7,3	6,5–9,5	—	Maximum
Sodium	12,4 mg/l	200 mg/l	6 %	Maximum
Sulphate	28,2 mg/l	250 mg/l	11 %	Maximum

Further parameters (5)

Further parameters – Leonding
Parameter	Value	Parametric value	Share of the parametric value	Reference
Calcium	85 mg/l	400 mg/l	21 %	Maximum
Carbonate hardness	13,7 °dH	—	—	Maximum
Magnesium	18,7 mg/l	150 mg/l	12 %	Maximum
Potassium	2,7 mg/l	50 mg/l	5 %	Maximum
Total hardness	16,2 °dH	—	—	Maximum

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.leonding.at/bauen-umwelt/umwelt-abfall/trink-wasserversorgung/wasserguete · 2025 · retrieved on 14/08/2026

Postcodes in this zone: 4060

Frequently asked questions about drinking water in Leonding, Wilhering

How hard is the water in Leonding, Wilhering?: Stadt Leonding / Linz AG Wasser publishes a total hardness of 16.2 °dH for the supply zone Leonding (hardness range hard). 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: Publication by the water supplier, retrieved on 14/08/2026.
How much nitrate is in the drinking water in Leonding, Wilhering?: Stadt Leonding / Linz AG Wasser publishes a nitrate value of 18,9 mg/l for the supply zone Leonding. The statutory parametric value is 50 mg/l; the measured value represents 38 % of the parametric value. Basis: Publication by the water supplier, retrieved on 14/08/2026.
Who supplies the drinking water in Leonding, Wilhering?: Stadt Leonding / Linz AG Wasser. The values shown here come from the supply zone Leonding 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.