Tap water hardness in AR
We have published hardness data for 7 cities in AR. The median is 23 °fH; the hardest water is in Herisau (31.9 °fH), the softest in Walzenhausen (16.3 °fH).
100 % of these cities have hard or very hard water (over 120 mg/L).
Cities in AR, hardest first
| °fH | mg/L | ||
|---|---|---|---|
| Herisau | 31.9 | 319 | very hard |
| Teufen | 29.7 | 297 | very hard |
| Gais | 25.4 | 254 | very hard |
| Heiden | 23 | 230 | very hard |
| Trogen | 22.4 | 224 | very hard |
| Speicher | 22 | 220 | very hard |
| Walzenhausen | 16.3 | 163 | hard |