Tap water hardness in Rheinland-Pfalz
We have published hardness data for 25 cities in Rheinland-Pfalz. The median is 9.9 °dH; the hardest water is in Bitburg (22.5 °dH), the softest in Annweiler am Trifels (2.9 °dH).
64 % 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 Rheinland-Pfalz, hardest first
| °dH | mg/L | ||
|---|---|---|---|
| Bitburg | 22.5 | 402 | very hard |
| Mainz | 19.3 | 345 | very hard |
| Bendorf | 17 | 304 | very hard |
| Wittlich | 16.2 | 289 | very hard |
| Bobenheim-Roxheim | 15.3 | 273 | very hard |
| Frankenthal (Pfalz) | 15.3 | 273 | very hard |
| Lahnstein | 14.5 | 259 | very hard |
| Speyer | 14.5 | 259 | very hard |
| Andernach | 14.3 | 255 | very hard |
| Konz | 13.6 | 243 | very hard |
| Neuhofen | 13.5 | 241 | very hard |
| Ludwigshafen am Rhein | 12.6 | 226 | very hard |
| Mendig | 9.9 | 177 | hard |
| Schweich | 9.8 | 175 | hard |
| Montabaur | 8.9 | 159 | hard |
| Schönenberg-Kübelberg | 8.3 | 148 | hard |
| Bruchmühlbach-Miesau | 6.6 | 118 | moderately hard |
| Kaiserslautern | 5.4 | 96 | moderately hard |
| Herdorf | 4.4 | 79 | moderately hard |
| Ransbach-Baumbach | 4.3 | 78 | moderately hard |
| Westerburg | 4.2 | 76 | moderately hard |
| Pirmasens | 3.9 | 70 | moderately hard |
| Idar-Oberstein | 3.4 | 61 | moderately hard |
| Hermeskeil | 3 | 53 | soft |
| Annweiler am Trifels | 2.9 | 52 | soft |