Water hardness in Belgium
1091 cities with published hardness data, sorted by population. Median: 31.6 °fH.
Median
31.6 °fH
316 mg/L CaCO₃ · very hard
- 27 soft
- 110 moderately hard
- 135 hard
- 819 very hard
Belgian suppliers report hardness in °f (French degrees); 1 °f = 10 mg/L CaCO₃.
Water hardness by postcode in Belgium
Ranking of the hardest and softest water in Belgium →
Regions
- Antwerpen65 · 17.4 °fH
- Brabant wallon82 · 36.6 °fH
- Hainaut271 · 38 °fH
- Liège237 · 27.3 °fH
- Limburg33 · 16.5 °fH
- Luxembourg94 · 12 °fH
- Namur137 · 32.3 °fH
- Oost-Vlaanderen54 · 19.7 °fH
- Vlaams-Brabant59 · 26.6 °fH
- West-Vlaanderen58 · 24.5 °fH
Largest places, hardest first
Every place is listed on its region page.
| °fH | mg/L | ||
|---|---|---|---|
| Soignies · Hainaut | 52.3 | 523 | very hard |
| Saint-Ghislain · Hainaut | 47.2 | 472 | very hard |
| Binche · Hainaut | 46 | 460 | very hard |
| Ronse · Oost-Vlaanderen | 45.5 | 455 | very hard |
| Mons · Hainaut | 44.9 | 449 | very hard |
| Oupeye · Liège | 44.5 | 445 | very hard |
| Ath · Hainaut | 42.8 | 428 | very hard |
| Ans · Liège | 42.4 | 424 | very hard |
| Oudenaarde · Oost-Vlaanderen | 42.1 | 421 | very hard |
| Geraardsbergen · Oost-Vlaanderen | 41.6 | 416 | very hard |
| Mouscron · Hainaut | 40.4 | 404 | very hard |
| Braine-l'Alleud · Brabant wallon | 40 | 400 | very hard |
| Zottegem · Oost-Vlaanderen | 39.9 | 399 | very hard |
| Overijse · Vlaams-Brabant | 39.9 | 399 | very hard |
| Halle · Vlaams-Brabant | 39.1 | 391 | very hard |
| Nivelles · Brabant wallon | 38.8 | 388 | very hard |
| La Louvière · Hainaut | 38.6 | 387 | very hard |
| Liège · Liège | 38.3 | 383 | very hard |
| Herstal · Liège | 38.3 | 383 | very hard |
| Andenne · Namur | 38.2 | 382 | very hard |
| Courcelles · Hainaut | 38.1 | 381 | very hard |
| Fleurus · Hainaut | 38 | 380 | very hard |
| Wavre · Brabant wallon | 37.8 | 378 | very hard |
| Jumet · Hainaut | 37.8 | 378 | very hard |
| Beersel · Vlaams-Brabant | 37.6 | 376 | very hard |
| Tienen · Vlaams-Brabant | 37.1 | 371 | very hard |
| Brussels · Brussels-Capital | 37 | 370 | very hard |
| Châtelet · Hainaut | 37 | 370 | very hard |
| Tournai · Hainaut | 36.8 | 368 | very hard |
| Vilvoorde · Vlaams-Brabant | 36.3 | 363 | very hard |
| Louvain-la-Neuve · Brabant wallon | 36.1 | 362 | very hard |
| Ninove · Oost-Vlaanderen | 34.6 | 346 | very hard |
| Saint-Nicolas · Liège | 34.2 | 342 | very hard |
| Manage · Hainaut | 34.2 | 342 | very hard |
| Tongeren · Limburg | 33.9 | 339 | very hard |
| Charleroi · Hainaut | 33.9 | 339 | very hard |
| Menen · West-Vlaanderen | 33.5 | 335 | very hard |
| Roeselare · West-Vlaanderen | 33.2 | 332 | very hard |
| Marcinelle · Hainaut | 32.4 | 324 | very hard |
| Grimbergen · Vlaams-Brabant | 31 | 310 | very hard |
| Zaventem · Vlaams-Brabant | 31 | 310 | very hard |
| Gent · Oost-Vlaanderen | 30.3 | 303 | very hard |
| Brugge · West-Vlaanderen | 30.3 | 303 | very hard |
| Deinze · Oost-Vlaanderen | 30.3 | 303 | very hard |
| Waregem · West-Vlaanderen | 27.4 | 274 | very hard |
| Izegem · West-Vlaanderen | 27.1 | 271 | very hard |
| Harelbeke · West-Vlaanderen | 27.1 | 271 | very hard |
| Sint-Truiden · Limburg | 27 | 270 | very hard |
| Wevelgem · West-Vlaanderen | 26.8 | 268 | very hard |
| Kortrijk · West-Vlaanderen | 26 | 260 | very hard |
| Waterloo · Brabant wallon | 25.6 | 256 | very hard |
| Lokeren · Oost-Vlaanderen | 25.4 | 254 | very hard |
| Zwevegem · West-Vlaanderen | 25.2 | 252 | very hard |
| Namur · Namur | 24.7 | 247 | very hard |
| Zedelgem · West-Vlaanderen | 24.4 | 244 | very hard |
| Heist-op-den-Berg · Antwerpen | 23.9 | 239 | very hard |
| Brasschaat · Antwerpen | 23.7 | 237 | very hard |
| Schoten · Antwerpen | 23.7 | 237 | very hard |
| Ieper · West-Vlaanderen | 22.9 | 229 | very hard |
| Seraing · Liège | 21.1 | 211 | very hard |
| Evergem · Oost-Vlaanderen | 21 | 210 | very hard |
| Flémalle-Haute · Liège | 20.8 | 208 | very hard |
| Ostend · West-Vlaanderen | 20.7 | 207 | very hard |
| Kapellen · Antwerpen | 20.3 | 203 | very hard |
| Leuven · Vlaams-Brabant | 19.9 | 199 | very hard |
| Hasselt · Limburg | 19.8 | 198 | very hard |
| Knokke-Heist · West-Vlaanderen | 19.8 | 198 | very hard |
| Westerlo · Antwerpen | 18.9 | 189 | very hard |
| Maldegem · Oost-Vlaanderen | 18.6 | 186 | very hard |
| Sint-Niklaas · Oost-Vlaanderen | 18.4 | 184 | very hard |
| Lier · Antwerpen | 18.2 | 182 | very hard |
| Temse · Oost-Vlaanderen | 18.2 | 182 | very hard |
| Aarschot · Vlaams-Brabant | 17.9 | 179 | hard |
| Koksijde · West-Vlaanderen | 17.6 | 176 | hard |
| Beveren · Oost-Vlaanderen | 17.6 | 176 | hard |
| Antwerp · Antwerpen | 17.1 | 171 | hard |
| Mortsel · Antwerpen | 17.1 | 171 | hard |
| Edegem · Antwerpen | 17.1 | 171 | hard |
| Lanaken · Limburg | 17 | 170 | hard |
| Dilbeek · Vlaams-Brabant | 16.9 | 169 | hard |
| Aalst · Oost-Vlaanderen | 16.8 | 168 | hard |
| Dendermonde · Oost-Vlaanderen | 16.8 | 168 | hard |
| Asse · Vlaams-Brabant | 16.8 | 168 | hard |
| Wetteren · Oost-Vlaanderen | 16.8 | 168 | hard |
| Hamme · Oost-Vlaanderen | 16.8 | 168 | hard |
| Herentals · Antwerpen | 16.7 | 167 | hard |
| Sint-Pieters-Leeuw · Vlaams-Brabant | 16.5 | 165 | hard |
| Genk · Limburg | 16.5 | 165 | hard |
| Bilzen · Limburg | 16.5 | 165 | hard |
| Willebroek · Antwerpen | 16.4 | 164 | hard |
| Turnhout · Antwerpen | 16.1 | 161 | hard |
| Geel · Antwerpen | 16.1 | 161 | hard |
| Maasmechelen · Limburg | 15.8 | 158 | hard |
| Arlon · Luxembourg | 14.1 | 141 | hard |
| Diest · Vlaams-Brabant | 14 | 140 | hard |
| Beringen · Limburg | 11.4 | 114 | moderately hard |
| Maaseik · Limburg | 11.2 | 112 | moderately hard |
| Mol · Antwerpen | 11 | 110 | moderately hard |
| Lommel · Limburg | 8.4 | 84 | moderately hard |
| Verviers · Liège | 7.9 | 79 | moderately hard |