Tap water hardness in Overijssel
We have published hardness data for 58 cities in Overijssel. The median is 7.5 °dH; the hardest water is in Vriezenveen (10.6 °dH), the softest in Nijverdal (5.4 °dH).
74 % of these cities have hard or very hard water (over 120 mg/L).
Dutch suppliers report °dH; most networks are softened centrally to 5.6–8.4 °dH.
Cities in Overijssel, hardest first
| °dH | mg/L | ||
|---|---|---|---|
| Vriezenveen | 10.6 | 189 | very hard |
| Wierden | 10.2 | 182 | very hard |
| Almelo | 10.1 | 180 | very hard |
| Westerhaar-Vriezenveensewijk | 9.7 | 173 | hard |
| Nieuwoord | 9.5 | 170 | hard |
| Vroomshoop | 9.5 | 170 | hard |
| Hardenberg | 9.4 | 168 | hard |
| Lonneker | 9.2 | 164 | hard |
| Den Ham | 8.8 | 157 | hard |
| Magele | 8.8 | 157 | hard |
| Ommen | 8.7 | 155 | hard |
| Tubbergen | 8.6 | 154 | hard |
| Enschede | 8.5 | 152 | hard |
| Dedemsvaart | 8.4 | 150 | hard |
| Blokzijl | 8.3 | 148 | hard |
| Glanerbrug | 8.2 | 146 | hard |
| Sint Jansklooster | 8.1 | 145 | hard |
| Vollenhove | 8 | 143 | hard |
| Heino | 7.9 | 141 | hard |
| Genemuiden | 7.8 | 139 | hard |
| Zwartsluis | 7.8 | 139 | hard |
| Oldenzaal | 7.7 | 137 | hard |
| Zwolle | 7.7 | 137 | hard |
| Zuid-Berghuizen | 7.6 | 137 | hard |
| Hasselt | 7.6 | 136 | hard |
| Losser | 7.6 | 135 | hard |
| Giethoorn | 7.5 | 134 | hard |
| Oldemarkt | 7.5 | 134 | hard |
| Steenwijkerwold | 7.5 | 134 | hard |
| Staphorst | 7.5 | 133 | hard |
| Dalfsen | 7.4 | 132 | hard |
| Denekamp | 7.4 | 132 | hard |
| Het Oostrik | 7.4 | 132 | hard |
| Steenwijk | 7.4 | 132 | hard |
| Tuk | 7.4 | 132 | hard |
| Bathmen | 7.3 | 130 | hard |
| Schalkhaar | 7.3 | 130 | hard |
| Ootmarsum | 7.2 | 129 | hard |
| Haaksbergen | 7.1 | 127 | hard |
| IJsselmuiden | 7 | 126 | hard |
| Delden | 6.9 | 123 | hard |
| Raalte | 6.8 | 121 | hard |
| Hengelo | 6.8 | 121 | hard |
| Borne | 6.7 | 120 | moderately hard |
| Goor | 6.6 | 119 | moderately hard |
| Enter | 6.5 | 116 | moderately hard |
| Kampen | 6.5 | 116 | moderately hard |
| Wijhe | 6.5 | 116 | moderately hard |
| Oosterholt | 6.4 | 114 | moderately hard |
| Woolde | 6.4 | 114 | moderately hard |
| Boskamp | 6.3 | 112 | moderately hard |
| Hengevelde | 6.3 | 112 | moderately hard |
| Markelo | 6.3 | 112 | moderately hard |
| Diepenheim | 6.2 | 111 | moderately hard |
| Rijssen | 6.1 | 109 | moderately hard |
| Olst | 5.9 | 105 | moderately hard |
| Haarle | 5.7 | 102 | moderately hard |
| Nijverdal | 5.4 | 96 | moderately hard |