Tap water hardness in South Denmark
We have published hardness data for 102 cities in South Denmark. The median is 13.2 °dH; the hardest water is in Rudkøbing (27.9 °dH), the softest in Oksbøl (6.1 °dH).
95 % of these cities have hard or very hard water (over 120 mg/L).
Danish waterworks report hardness in °dH; GEUS classes: soft < 8, medium hard 8–12, fairly hard 12–18, hard 18–30, very hard > 30 °dH. Most Danish tap water is groundwater and hard.
Cities in South Denmark, hardest first
| °dH | mg/L | ||
|---|---|---|---|
| Rudkøbing | 27.9 | 498 | very hard |
| Marstal | 22.8 | 407 | very hard |
| Ærøskøbing | 21.4 | 381 | very hard |
| Middelfart | 21 | 375 | very hard |
| Tranekær | 20.3 | 363 | very hard |
| Nyborg | 19.2 | 343 | very hard |
| Nordborg | 19.1 | 341 | very hard |
| Over Holluf | 18.9 | 337 | very hard |
| Skårup | 18.7 | 334 | very hard |
| Ørbæk | 18.2 | 326 | very hard |
| Kværndrup | 18.1 | 323 | very hard |
| Thurø By | 18.1 | 323 | very hard |
| Assens | 17.5 | 312 | very hard |
| Strib | 17.5 | 312 | very hard |
| Guderup | 17.3 | 309 | very hard |
| Ryslinge | 17.2 | 307 | very hard |
| Vissenbjerg | 16.9 | 302 | very hard |
| Faaborg | 16.8 | 301 | very hard |
| Gråsten | 16.7 | 298 | very hard |
| Svendborg | 16.7 | 298 | very hard |
| Ullerslev | 16.7 | 298 | very hard |
| Vindeby | 16.7 | 298 | very hard |
| Broager | 16.6 | 297 | very hard |
| Vester-Skerninge | 16.6 | 297 | very hard |
| Snoghøj | 16.5 | 295 | very hard |
| Tommerup | 16.4 | 294 | very hard |
| Høruphav | 16.4 | 293 | very hard |
| Morud | 16.4 | 293 | very hard |
| Bellinge | 16.1 | 287 | very hard |
| Højby | 16 | 286 | very hard |
| Ringe | 16 | 286 | very hard |
| Søndersø | 15.9 | 284 | very hard |
| Sønderborg | 15.8 | 282 | very hard |
| Dybbøl | 15.6 | 278 | very hard |
| Langeskov | 15.6 | 278 | very hard |
| Nørre Åby | 15.6 | 278 | very hard |
| Bullerup | 15.5 | 276 | very hard |
| Brenderup | 15.4 | 275 | very hard |
| Neder Holluf | 15.3 | 273 | very hard |
| Odense | 15.3 | 273 | very hard |
| Stige | 15.3 | 273 | very hard |
| Augustenborg | 15.2 | 271 | very hard |
| Gelsted | 14.7 | 262 | very hard |
| Børkop | 14.6 | 262 | very hard |
| Bredebro | 14.4 | 258 | very hard |
| Årslev | 14.3 | 256 | very hard |
| Vamdrup | 14.2 | 253 | very hard |
| Otterup | 13.8 | 247 | very hard |
| Årup | 13.8 | 246 | very hard |
| Tønder | 13.7 | 245 | very hard |
| Vejle | 13.4 | 239 | very hard |
| Brejning | 13.1 | 234 | very hard |
| Glamsbjerg | 12.9 | 230 | very hard |
| Taulov | 12.6 | 226 | very hard |
| Haarby | 12.6 | 225 | very hard |
| Haderslev | 12.6 | 225 | very hard |
| Padborg | 12.6 | 225 | very hard |
| Starup | 12.6 | 225 | very hard |
| Gredstedbro | 12.3 | 220 | very hard |
| Rødding | 12.3 | 220 | very hard |
| Kruså | 12.1 | 215 | very hard |
| Christiansfeld | 12 | 214 | very hard |
| Egtved | 11.9 | 212 | very hard |
| Fredericia | 11.9 | 212 | very hard |
| Bogense | 11.8 | 211 | very hard |
| Kerteminde | 11.5 | 205 | very hard |
| Løjt Kirkeby | 11.5 | 205 | very hard |
| Munkebo | 11.5 | 205 | very hard |
| Højer | 11.3 | 202 | very hard |
| Jelling | 11 | 197 | very hard |
| Rødekro | 11 | 196 | very hard |
| Kolding | 10.9 | 195 | very hard |
| Tinglev | 10.9 | 195 | very hard |
| Aabenraa | 10.7 | 191 | very hard |
| Lunderskov | 10.3 | 184 | very hard |
| Gram | 9.8 | 176 | hard |
| Ribe | 9.8 | 175 | hard |
| Bramming | 9.6 | 171 | hard |
| Gørding | 9.5 | 170 | hard |
| Outrup | 9.5 | 170 | hard |
| Ølgod | 9.3 | 166 | hard |
| Bække | 9.2 | 164 | hard |
| Hjordkær | 9.2 | 164 | hard |
| Brørup | 9 | 161 | hard |
| Løgumkloster | 8.8 | 157 | hard |
| Toftlund | 8.6 | 154 | hard |
| Billund | 8.3 | 148 | hard |
| Ålbæk | 8.2 | 146 | hard |
| Tistrup | 8 | 143 | hard |
| Give | 7.7 | 137 | hard |
| Holsted | 7.4 | 132 | hard |
| Skaerbaek | 7.4 | 132 | hard |
| Nordby | 7.3 | 130 | hard |
| Vejen | 6.9 | 123 | hard |
| Vorbasse | 6.9 | 123 | hard |
| Esbjerg | 6.8 | 121 | hard |
| Tjæreborg | 6.8 | 121 | hard |
| Vojens | 6.6 | 118 | moderately hard |
| Varde | 6.5 | 116 | moderately hard |
| Nørre Nebel | 6.4 | 114 | moderately hard |
| Grindsted | 6.3 | 112 | moderately hard |
| Oksbøl | 6.1 | 109 | moderately hard |