Water hardness in Denmark
388 cities with published hardness data, sorted by population. Median: 14.9 °dH.
Median
14.9 °dH
266 mg/L CaCO₃ · very hard
- 14 moderately hard
- 67 hard
- 307 very hard
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.
Water hardness by postcode in Denmark
Ranking of the hardest and softest water in Denmark →
Regions
- Capital Region75 · 18.8 °dH
- Central Jutland90 · 11.7 °dH
- North Denmark49 · 10.8 °dH
- South Denmark102 · 13.2 °dH
- Zealand72 · 18 °dH
Largest places, hardest first
Every place is listed on its region page.
| °dH | mg/L | ||
|---|---|---|---|
| Dragør · Capital Region | 24.7 | 442 | very hard |
| Hedehusene · Capital Region | 23.7 | 424 | very hard |
| Fløng · Capital Region | 23.7 | 424 | very hard |
| Taastrup · Capital Region | 23.6 | 421 | very hard |
| Albertslund · Capital Region | 22.4 | 400 | very hard |
| Brøndby Strand · Capital Region | 22.4 | 400 | very hard |
| Stenløse · Capital Region | 21.9 | 392 | very hard |
| Greve · Zealand | 21.5 | 384 | very hard |
| Birkerød · Capital Region | 21.5 | 384 | very hard |
| Ishøj · Capital Region | 21.5 | 384 | very hard |
| Rødovre · Capital Region | 21 | 375 | very hard |
| Middelfart · South Denmark | 21 | 375 | very hard |
| Vallensbæk · Capital Region | 20.9 | 374 | very hard |
| Roskilde · Zealand | 20.7 | 370 | very hard |
| Køge · Zealand | 20.4 | 364 | very hard |
| Tranekær · South Denmark | 20.3 | 363 | very hard |
| Virum · Capital Region | 20.3 | 362 | very hard |
| Ballerup · Capital Region | 20.2 | 361 | very hard |
| Skovlunde · Capital Region | 20.2 | 361 | very hard |
| Glostrup · Capital Region | 20.1 | 360 | very hard |
| Hvidovre · Capital Region | 20 | 357 | very hard |
| Tårnby · Capital Region | 19.8 | 354 | very hard |
| Nakskov · Zealand | 19.7 | 352 | very hard |
| Charlottenlund · Capital Region | 19.6 | 350 | very hard |
| Frederikssund · Capital Region | 19.5 | 348 | very hard |
| Værløse · Capital Region | 19.5 | 348 | very hard |
| Nyborg · South Denmark | 19.2 | 343 | very hard |
| Kalundborg · Zealand | 19.1 | 342 | very hard |
| Frederiksværk · Capital Region | 19.1 | 341 | very hard |
| Hørsholm · Capital Region | 19 | 340 | very hard |
| Vordingborg · Zealand | 18.9 | 337 | very hard |
| Farum · Capital Region | 18.8 | 336 | very hard |
| Kongens Lyngby · Capital Region | 18.3 | 327 | very hard |
| Tilst · Central Jutland | 17.9 | 320 | very hard |
| Lillerød · Capital Region | 17.8 | 318 | very hard |
| Ringsted · Zealand | 17.7 | 316 | very hard |
| Copenhagen · Capital Region | 17.6 | 314 | very hard |
| Århus · Central Jutland | 17.6 | 314 | very hard |
| Gjellerup · Central Jutland | 17.6 | 314 | very hard |
| Viby · Central Jutland | 17.3 | 309 | very hard |
| Allerød · Capital Region | 17.1 | 305 | very hard |
| Frederiksberg · Capital Region | 17 | 303 | very hard |
| Svendborg · South Denmark | 16.7 | 298 | very hard |
| Brøndbyvester · Capital Region | 16.6 | 296 | very hard |
| Haslev · Zealand | 16.4 | 293 | very hard |
| Jyllinge · Zealand | 16.4 | 293 | very hard |
| Næstved · Zealand | 16.3 | 292 | very hard |
| Slagelse · Zealand | 16.1 | 287 | very hard |
| Grenaa · Central Jutland | 16.1 | 287 | very hard |
| Skanderborg · Central Jutland | 16 | 286 | very hard |
| Sønderborg · South Denmark | 15.8 | 282 | very hard |
| Nykøbing Falster · Zealand | 15.6 | 278 | very hard |
| Holbæk · Zealand | 15.5 | 277 | very hard |
| Horsens · Central Jutland | 15.4 | 275 | very hard |
| Odense · South Denmark | 15.3 | 273 | very hard |
| Korsør · Zealand | 14.9 | 266 | very hard |
| Helsingør · Capital Region | 14.7 | 262 | very hard |
| Karlebo · Capital Region | 14.7 | 262 | very hard |
| Espergærde · Capital Region | 14.7 | 262 | very hard |
| Hillerød · Capital Region | 14.6 | 261 | very hard |
| Thisted · North Denmark | 13.9 | 248 | very hard |
| Tønder · South Denmark | 13.7 | 245 | very hard |
| Aalborg · North Denmark | 13.5 | 241 | very hard |
| Odder · Central Jutland | 13.5 | 241 | very hard |
| Vejle · South Denmark | 13.4 | 239 | very hard |
| Hjørring · North Denmark | 13 | 232 | very hard |
| Nørresundby · North Denmark | 12.8 | 229 | very hard |
| Haderslev · South Denmark | 12.6 | 225 | very hard |
| Randers · Central Jutland | 12.3 | 220 | very hard |
| Fredericia · South Denmark | 11.9 | 212 | very hard |
| Hedensted · Central Jutland | 11.7 | 209 | very hard |
| Brønderslev · North Denmark | 11.5 | 205 | very hard |
| Rønne · Capital Region | 11.1 | 198 | very hard |
| Løsning · Central Jutland | 11.1 | 198 | very hard |
| Kolding · South Denmark | 10.9 | 195 | very hard |
| Aabenraa · South Denmark | 10.7 | 191 | very hard |
| Holstebro · Central Jutland | 10.3 | 184 | very hard |
| Skive · Central Jutland | 9.3 | 166 | hard |
| Frederikshavn · North Denmark | 9 | 161 | hard |
| Herning · Central Jutland | 8.1 | 145 | hard |
| Viborg · Central Jutland | 8.1 | 145 | hard |
| Ikast · Central Jutland | 8 | 143 | hard |
| Hobro · North Denmark | 7.8 | 139 | hard |
| Esbjerg · South Denmark | 6.8 | 121 | hard |
| Varde · South Denmark | 6.5 | 116 | moderately hard |
| Struer · Central Jutland | 6.1 | 109 | moderately hard |
| Silkeborg · Central Jutland | 3.6 | 64 | moderately hard |