Tap water hardness in SG
We have published hardness data for 51 cities in SG. The median is 25.3 °fH; the hardest water is in Zuzwil (39.6 °fH), the softest in Quarten (7.2 °fH).
96 % of these cities have hard or very hard water (over 120 mg/L).
Cities in SG, hardest first
| °fH | mg/L | ||
|---|---|---|---|
| Zuzwil | 39.6 | 396 | very hard |
| Kirchberg | 39.3 | 393 | very hard |
| Lütisburg | 39.3 | 393 | very hard |
| Oberbüren | 38.5 | 385 | very hard |
| Uzwil | 38.2 | 382 | very hard |
| Tübach | 37.8 | 378 | very hard |
| Oberuzwil | 37 | 370 | very hard |
| Gossau | 36.2 | 362 | very hard |
| Andwil | 35.3 | 353 | very hard |
| Flawil | 33.1 | 331 | very hard |
| Jona | 33 | 330 | very hard |
| Benken | 32 | 320 | very hard |
| Eggersriet | 32 | 320 | very hard |
| Waldkirch | 31.4 | 314 | very hard |
| Kaltbrunn | 31.1 | 311 | very hard |
| Gaiserwald | 31 | 310 | very hard |
| Rebstein | 31 | 310 | very hard |
| Rapperswil-Jona | 30.7 | 307 | very hard |
| Oberriet | 29.5 | 295 | very hard |
| Untereggen | 29 | 290 | very hard |
| Uznach | 28.1 | 281 | very hard |
| Degersheim | 27.4 | 274 | very hard |
| Lichtensteig | 26.7 | 267 | very hard |
| Bütschwil-Ganterschwil | 26.6 | 266 | very hard |
| Eschenbach | 26 | 260 | very hard |
| Wattwil | 25.3 | 253 | very hard |
| Neckertal | 23.6 | 236 | very hard |
| Rorschacherberg | 23.5 | 235 | very hard |
| Eichberg | 22.9 | 229 | very hard |
| Gommiswald | 22.9 | 229 | very hard |
| Rüthi | 22.4 | 224 | very hard |
| Altstätten | 22.1 | 221 | very hard |
| Ebnat-Kappel | 22 | 220 | very hard |
| Gams | 21.8 | 218 | very hard |
| Au | 21 | 210 | very hard |
| Schänis | 20.5 | 205 | very hard |
| Widnau | 20.5 | 205 | very hard |
| Rheineck | 19.9 | 199 | very hard |
| Thal | 16.6 | 167 | hard |
| St. Margrethen | 16.6 | 166 | hard |
| Goldach | 16.5 | 165 | hard |
| Rorschach | 16.5 | 165 | hard |
| St. Gallen | 16.2 | 162 | hard |
| Weesen | 15 | 150 | hard |
| Amden | 14.6 | 146 | hard |
| Bad Ragaz | 14.5 | 145 | hard |
| Mels | 14 | 140 | hard |
| Buchs | 13.2 | 132 | hard |
| Wartau | 12.5 | 125 | hard |
| Vilters-Wangs | 10.2 | 102 | moderately hard |
| Quarten | 7.2 | 72 | moderately hard |