Tap water hardness in SZ
We have published hardness data for 12 cities in SZ. The median is 19.2 °fH; the hardest water is in Arth (26.1 °fH), the softest in Innerthal (12.2 °fH).
100 % of these cities have hard or very hard water (over 120 mg/L).
Cities in SZ, hardest first
| °fH | mg/L | ||
|---|---|---|---|
| Arth | 26.1 | 261 | very hard |
| Altendorf | 24 | 240 | very hard |
| Rothenthurm | 22 | 220 | very hard |
| Sattel | 20.8 | 208 | very hard |
| Freienbach | 19.2 | 192 | very hard |
| Wollerau | 19.2 | 192 | very hard |
| Küssnacht | 19.1 | 191 | very hard |
| Unteriberg | 17.6 | 176 | hard |
| Schwyz | 17.4 | 174 | hard |
| Vorderthal | 15.4 | 154 | hard |
| Lachen | 15 | 150 | hard |
| Innerthal | 12.2 | 122 | hard |