Compare tap water hardness in 31 cities in Hainaut, Belgium. Average: 42°fH (Average quality).
In Hainaut province, tap water hardness averages 42°fH, corresponding to very hard water. The softest water is found in Beloeil (37°fH, score 5/10) and the hardest in Tongre-Saint-Martin (48°fH, score 2/10). The Belgian national average is 30°fH. All 31 cities in our database have water that complies with European potability standards (Directive 2020/2184).
The average tap water hardness in Hainaut province is 42°fH, corresponding to very hard water. Among the 31 cities covered, the softest water is found in Beloeil (37°fH) and the hardest in Tongre-Saint-Martin (48°fH). The Belgian national average is 30°fH.
Yes. Tap water in Hainaut province meets European potability standards (Directive 2020/2184). The hardness of 42°fH does not affect sanitary safety, only appliance maintenance and taste. All 31 cities in our database show compliant water.
With an average of 42°fH, a water softener or anti-scale filter is a worthwhile investment in Hainaut. 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 Tongre-Saint-Martin (48°fH).
Water in Hainaut 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 31 cities in Hainaut 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).