Tap water hardness in Thüringen
We have published hardness data for 8 cities in Thüringen. The median is 16.5 °dH; the hardest water is in Creuzburg (25.5 °dH), the softest in Ruhla (4.5 °dH).
88 % of these cities have hard or very hard water (over 120 mg/L).
German law (WRMG) uses 3 bands: soft < 8.4 °dH, medium 8.4–14 °dH, hard > 14 °dH.
Cities in Thüringen, hardest first
| °dH | mg/L | ||
|---|---|---|---|
| Creuzburg | 25.5 | 455 | very hard |
| Treffurt | 21.7 | 388 | very hard |
| Eisenach | 18 | 321 | very hard |
| Krauthausen | 17 | 304 | very hard |
| Jena | 16 | 286 | very hard |
| Seebach | 14 | 250 | very hard |
| Altenburg | 9 | 161 | hard |
| Ruhla | 4.5 | 80 | moderately hard |