Compare tap water hardness in 21 cities in Bruxelles, Belgium. Average: 35°fH (Average quality).
In Bruxelles province, tap water hardness averages 35°fH, corresponding to hard water. The softest water is found in Berchem-Sainte-Agathe (25°fH, score 7/10) and the hardest in Sint-Gillis (39°fH, score 4/10). The Belgian national average is 30°fH. All 21 cities in our database have water that complies with European potability standards (Directive 2020/2184).
The average tap water hardness in Bruxelles province is 35°fH, corresponding to hard water. Among the 21 cities covered, the softest water is found in Berchem-Sainte-Agathe (25°fH) and the hardest in Sint-Gillis (39°fH). The Belgian national average is 30°fH.
Yes. Tap water in Bruxelles province meets European potability standards (Directive 2020/2184). The hardness of 35°fH does not affect sanitary safety, only appliance maintenance and taste. All 21 cities in our database show compliant water.
With an average of 35°fH, a water softener or anti-scale filter is a worthwhile investment in Bruxelles. Limescale visibly shortens the lifespan of boilers, washing machines and coffee makers. A softener is recommended in particular for cities above 35°fH such as Sint-Gillis (39°fH).
Water in Bruxelles province is distributed by SWDE (Wallonia), De Watergroep / VMM (Flanders) or VIVAQUA (Brussels), depending on the municipality. Data in our database comes from official analyses published by these utilities in 2024.
All 21 cities in Bruxelles province with their TH hardness values are listed on this page. Click on any city name to get full details: quality index, sanitary compliance, appliance impact and personalised recommendations.
Data: SWDE (Wallonia), De Watergroep / VMM (Flanders), VIVAQUA (Brussels) (2024).