Tap water hardness in Schleswig-Holstein
We have published hardness data for 26 cities in Schleswig-Holstein. The median is 12 °dH; the hardest water is in Stockelsdorf (18.6 °dH), the softest in Hohenlockstedt (6.3 °dH).
92 % 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 Schleswig-Holstein, hardest first
| °dH | mg/L | ||
|---|---|---|---|
| Stockelsdorf | 18.6 | 332 | very hard |
| Rellingen | 17.4 | 311 | very hard |
| Kiel | 16.9 | 301 | very hard |
| Neustadt in Holstein | 16.5 | 295 | very hard |
| Lübeck | 16.3 | 292 | very hard |
| Malente | 16 | 286 | very hard |
| Pinneberg | 15.9 | 284 | very hard |
| Eckernförde | 15.6 | 278 | very hard |
| Elmshorn | 14.5 | 259 | very hard |
| Uetersen | 13.2 | 236 | very hard |
| Großhansdorf | 12.5 | 224 | very hard |
| Neumünster | 12.3 | 220 | very hard |
| Itzehoe | 12.3 | 220 | very hard |
| Norderstedt | 11.6 | 208 | very hard |
| Bargteheide | 11.5 | 205 | very hard |
| Glucksburg | 11.1 | 198 | very hard |
| Kaltenkirchen | 10.7 | 191 | very hard |
| Rendsburg | 10.6 | 190 | very hard |
| Geesthacht | 10.4 | 186 | very hard |
| Glinde | 10.1 | 181 | very hard |
| Kellinghusen | 8.9 | 159 | hard |
| Nortorf | 8.7 | 155 | hard |
| Flensburg | 7.8 | 140 | hard |
| Glückstadt | 7.6 | 136 | hard |
| Büchen | 6.6 | 118 | moderately hard |
| Hohenlockstedt | 6.3 | 113 | moderately hard |