Tap water hardness in SO
We have published hardness data for 33 cities in SO. The median is 25.7 °fH; the hardest water is in Däniken (33.7 °fH), the softest in Grenchen (18 °fH).
100 % of these cities have hard or very hard water (over 120 mg/L).
Cities in SO, hardest first
| °fH | mg/L | ||
|---|---|---|---|
| Däniken | 33.7 | 337 | very hard |
| Wangen bei Olten | 33.3 | 333 | very hard |
| Witterswil | 33.1 | 331 | very hard |
| Lüsslingen-Nennigkofen | 32.9 | 329 | very hard |
| Schnottwil | 32.2 | 322 | very hard |
| Biezwil | 31.3 | 313 | very hard |
| Olten | 31 | 310 | very hard |
| Unterramsern | 30 | 300 | very hard |
| Langendorf | 29.7 | 297 | very hard |
| Rodersdorf | 28.9 | 289 | very hard |
| Büren | 27.8 | 278 | very hard |
| Gerlafingen | 27 | 270 | very hard |
| Bellach | 26.1 | 261 | very hard |
| Buchegg | 26 | 260 | very hard |
| Bettlach | 25.7 | 257 | very hard |
| Biberist | 25.7 | 257 | very hard |
| Lüterkofen-Ichertswil | 25.7 | 257 | very hard |
| Obergerlafingen | 25.7 | 257 | very hard |
| Recherswil | 25.7 | 257 | very hard |
| Selzach | 25.7 | 257 | very hard |
| Derendingen | 25.6 | 257 | very hard |
| Günsberg | 25.6 | 256 | very hard |
| Solothurn | 25.5 | 255 | very hard |
| Fehren | 25.3 | 253 | very hard |
| Breitenbach | 25.3 | 253 | very hard |
| Zuchwil | 25.1 | 251 | very hard |
| Seewen | 25 | 250 | very hard |
| Dornach | 24.9 | 249 | very hard |
| Balsthal | 23.8 | 238 | very hard |
| Luterbach | 23.8 | 238 | very hard |
| Oberdorf | 23 | 230 | very hard |
| Welschenrohr-Gänsbrunnen | 19.5 | 195 | very hard |
| Grenchen | 18 | 180 | very hard |