Hardest and softest tap water in Denmark
All 388 cities in Denmark with published data, ranked by total hardness. The national median is 14.9 °dH.
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.
25 cities with the hardest water
| # | °dH | mg/L | ||
|---|---|---|---|---|
| 1 | Rudkøbing · South Denmark | 27.9 | 498 | very hard |
| 2 | Stege · Zealand | 26.7 | 477 | very hard |
| 3 | Dragør · Capital Region | 24.7 | 442 | very hard |
| 4 | Fløng · Capital Region | 23.7 | 424 | very hard |
| 5 | Hedehusene · Capital Region | 23.7 | 424 | very hard |
| 6 | Taastrup · Capital Region | 23.6 | 421 | very hard |
| 7 | Marstal · South Denmark | 22.8 | 407 | very hard |
| 8 | Ølstykke · Capital Region | 22.5 | 402 | very hard |
| 9 | Albertslund · Capital Region | 22.4 | 400 | very hard |
| 10 | Brøndby Strand · Capital Region | 22.4 | 400 | very hard |
| 11 | Trørød · Capital Region | 22.3 | 398 | very hard |
| 12 | Søllested · Zealand | 22.1 | 394 | very hard |
| 13 | Stenløse · Capital Region | 21.9 | 392 | very hard |
| 14 | Søvang · Capital Region | 21.8 | 389 | very hard |
| 15 | Birkerød · Capital Region | 21.5 | 384 | very hard |
| 16 | Greve · Zealand | 21.5 | 384 | very hard |
| 17 | Ishøj · Capital Region | 21.5 | 384 | very hard |
| 18 | Veksø · Capital Region | 21.4 | 382 | very hard |
| 19 | Ærøskøbing · South Denmark | 21.4 | 381 | very hard |
| 20 | Holte · Capital Region | 21 | 376 | very hard |
| 21 | Middelfart · South Denmark | 21 | 375 | very hard |
| 22 | Rødovre · Capital Region | 21 | 375 | very hard |
| 23 | Skælskør · Zealand | 21 | 375 | very hard |
| 24 | Vallensbæk · Capital Region | 20.9 | 374 | very hard |
| 25 | Smørumnedre · Capital Region | 20.9 | 373 | very hard |
25 cities with the softest water
| # | °dH | mg/L | ||
|---|---|---|---|---|
| 1 | Silkeborg · Central Jutland | 3.6 | 64 | moderately hard |
| 2 | Brande · Central Jutland | 4.7 | 84 | moderately hard |
| 3 | Karup · Central Jutland | 5.3 | 95 | moderately hard |
| 4 | Byrum · North Denmark | 5.3 | 95 | moderately hard |
| 5 | Videbæk · Central Jutland | 5.5 | 98 | moderately hard |
| 6 | Virklund · Central Jutland | 5.9 | 105 | moderately hard |
| 7 | Struer · Central Jutland | 6.1 | 109 | moderately hard |
| 8 | Oksbøl · South Denmark | 6.1 | 109 | moderately hard |
| 9 | Kibæk · Central Jutland | 6.2 | 111 | moderately hard |
| 10 | Grindsted · South Denmark | 6.3 | 112 | moderately hard |
| 11 | Nørre Nebel · South Denmark | 6.4 | 114 | moderately hard |
| 12 | Hammerum · Central Jutland | 6.4 | 115 | moderately hard |
| 13 | Varde · South Denmark | 6.5 | 116 | moderately hard |
| 14 | Vojens · South Denmark | 6.6 | 118 | moderately hard |
| 15 | Tjæreborg · South Denmark | 6.8 | 121 | hard |
| 16 | Esbjerg · South Denmark | 6.8 | 121 | hard |
| 17 | Vorbasse · South Denmark | 6.9 | 123 | hard |
| 18 | Vejen · South Denmark | 6.9 | 123 | hard |
| 19 | Skjern · Central Jutland | 7.1 | 127 | hard |
| 20 | Vemb · Central Jutland | 7.3 | 130 | hard |
| 21 | Nordby · South Denmark | 7.3 | 130 | hard |
| 22 | Ulfborg · Central Jutland | 7.4 | 132 | hard |
| 23 | Tarm · Central Jutland | 7.4 | 132 | hard |
| 24 | Skaerbaek · South Denmark | 7.4 | 132 | hard |
| 25 | Holsted · South Denmark | 7.4 | 132 | hard |