Water hardness in the Netherlands
654 cities with published hardness data, sorted by population. Median: 7.5 °dH.
Median
7.5 °dH
134 mg/L CaCO₃ · hard
- 5 soft
- 171 moderately hard
- 447 hard
- 31 very hard
Dutch suppliers report °dH; most networks are softened centrally to 5.6–8.4 °dH.
Water hardness by postcode in the Netherlands
Separate page: water hardness by postcode in the Netherlands →
Ranking of the hardest and softest water in the Netherlands →
Regions
- Drenthe5 · 7.6 °dH
- Flevoland19 · 7.7 °dH
- Friesland103 · 7.2 °dH
- Gelderland184 · 6.7 °dH
- Limburg6 · 8.3 °dH
- Noord-Holland5 · 7.8 °dH
- North Brabant181 · 7.9 °dH
- North Holland13 · 7.9 °dH
- Overijssel58 · 7.5 °dH
- South Holland12 · 7.8 °dH
- Utrecht59 · 6.8 °dH
- Zeeland4 · 8.9 °dH
- Zuid-Holland5 · 8 °dH
Largest places, hardest first
Every place is listed on its region page.
| °dH | mg/L | ||
|---|---|---|---|
| Helmond · North Brabant | 11.3 | 202 | very hard |
| Tiel · Gelderland | 11 | 196 | very hard |
| Roermond · Limburg | 10.8 | 193 | very hard |
| Almelo · Overijssel | 10.1 | 180 | very hard |
| Venray · Limburg | 9.9 | 178 | hard |
| Roosendaal · North Brabant | 9.9 | 176 | hard |
| Hardenberg · Overijssel | 9.4 | 168 | hard |
| Best · North Brabant | 9.2 | 163 | hard |
| 's-Hertogenbosch · North Brabant | 9 | 161 | hard |
| Breda · North Brabant | 9 | 160 | hard |
| Middelburg · Zeeland | 8.9 | 159 | hard |
| Vlissingen · Zeeland | 8.9 | 159 | hard |
| Goes · Zeeland | 8.9 | 159 | hard |
| Bergen op Zoom · North Brabant | 8.9 | 158 | hard |
| Sittard · Limburg | 8.7 | 155 | hard |
| Maarssen · Utrecht | 8.6 | 154 | hard |
| Nijmegen · Gelderland | 8.5 | 153 | hard |
| Enschede · Overijssel | 8.5 | 152 | hard |
| Dordrecht · South Holland | 8.1 | 145 | hard |
| Emmeloord · Flevoland | 8.1 | 145 | hard |
| The Hague · South Holland | 8.1 | 144 | hard |
| Scheveningen · Zuid-Holland | 8.1 | 144 | hard |
| Hoofddorp · North Holland | 8 | 143 | hard |
| Oss · North Brabant | 8 | 143 | hard |
| Assen · Drenthe | 8 | 143 | hard |
| Emmen · Drenthe | 8 | 143 | hard |
| Doetinchem · Gelderland | 8 | 143 | hard |
| Woerden · Utrecht | 8 | 143 | hard |
| Terneuzen · Zeeland | 8 | 143 | hard |
| Leiden · South Holland | 8 | 142 | hard |
| Zoetermeer · South Holland | 8 | 142 | hard |
| Leeuwarden · Friesland | 7.9 | 142 | hard |
| Haarlem · North Holland | 7.9 | 141 | hard |
| Zaanstad · North Holland | 7.9 | 141 | hard |
| Alkmaar · North Holland | 7.9 | 141 | hard |
| Zaandam · North Holland | 7.9 | 141 | hard |
| Hoorn · North Holland | 7.9 | 141 | hard |
| Velsen-Zuid · North Holland | 7.9 | 141 | hard |
| Den Helder · North Holland | 7.9 | 141 | hard |
| Weert · Limburg | 7.9 | 141 | hard |
| Uden · North Brabant | 7.8 | 140 | hard |
| Amsterdam · Noord-Holland | 7.8 | 139 | hard |
| Delft · South Holland | 7.8 | 139 | hard |
| Amstelveen · North Holland | 7.8 | 139 | hard |
| Spijkenisse · South Holland | 7.8 | 139 | hard |
| Vlaardingen · South Holland | 7.8 | 139 | hard |
| Barendrecht · South Holland | 7.8 | 139 | hard |
| Hoogvliet · South Holland | 7.8 | 139 | hard |
| Maassluis · South Holland | 7.8 | 139 | hard |
| Wijchen · Gelderland | 7.8 | 139 | hard |
| Dronten · Flevoland | 7.8 | 139 | hard |
| Beuningen · Gelderland | 7.8 | 139 | hard |
| Tilburg · North Brabant | 7.8 | 139 | hard |
| Oosterhout · North Brabant | 7.8 | 139 | hard |
| Zwolle · Overijssel | 7.7 | 137 | hard |
| Oldenzaal · Overijssel | 7.7 | 137 | hard |
| Rotterdam · Zuid-Holland | 7.6 | 136 | hard |
| Schiedam · South Holland | 7.6 | 136 | hard |
| Capelle aan den IJssel · South Holland | 7.6 | 136 | hard |
| Winterswijk · Gelderland | 7.6 | 136 | hard |
| Meppel · Drenthe | 7.5 | 134 | hard |
| Drachten · Friesland | 7.4 | 132 | hard |
| Dalfsen · Overijssel | 7.4 | 132 | hard |
| Boxtel · North Brabant | 7.4 | 132 | hard |
| Hilversum · North Holland | 7.2 | 129 | hard |
| Culemborg · Gelderland | 7.2 | 129 | hard |
| Nieuwegein · Utrecht | 7.1 | 128 | hard |
| Waalwijk · North Brabant | 7.1 | 127 | hard |
| Veenendaal · Utrecht | 7 | 125 | hard |
| Heerenveen · Friesland | 6.9 | 124 | hard |
| IJsselstein · Utrecht | 6.9 | 124 | hard |
| Zevenaar · Gelderland | 6.9 | 123 | hard |
| Soest · Utrecht | 6.9 | 122 | hard |
| Sneek · Friesland | 6.8 | 121 | hard |
| Hengelo · Overijssel | 6.8 | 121 | hard |
| Kampen · Overijssel | 6.5 | 116 | moderately hard |
| Geldermalsen · Gelderland | 6.4 | 115 | moderately hard |
| Utrecht · Utrecht | 6.4 | 114 | moderately hard |
| Zaltbommel · Gelderland | 6.3 | 112 | moderately hard |
| Arnhem · Gelderland | 6.2 | 111 | moderately hard |
| Ede · Gelderland | 6.2 | 111 | moderately hard |
| Nijkerk · Gelderland | 6.2 | 111 | moderately hard |
| Barneveld · Gelderland | 6.2 | 111 | moderately hard |
| Rijssen · Overijssel | 6.1 | 109 | moderately hard |
| Oisterwijk · North Brabant | 6.1 | 108 | moderately hard |
| Amersfoort · Utrecht | 6 | 107 | moderately hard |
| Eindhoven · North Brabant | 5.9 | 106 | moderately hard |
| Zeist · Utrecht | 5.8 | 104 | moderately hard |
| Leusden · Utrecht | 5.7 | 103 | moderately hard |
| Valkenswaard · North Brabant | 5.7 | 102 | moderately hard |
| Geldrop · North Brabant | 5.7 | 102 | moderately hard |
| Apeldoorn · Gelderland | 5.7 | 102 | moderately hard |
| Harderwijk · Gelderland | 5.7 | 102 | moderately hard |
| Brunssum · Limburg | 5.6 | 100 | moderately hard |
| Lelystad · Flevoland | 5.2 | 93 | moderately hard |
| Wageningen · Gelderland | 4.9 | 88 | moderately hard |
| Almere Stad · Flevoland | 4.6 | 83 | moderately hard |
| Zutphen · Gelderland | 4.3 | 76 | moderately hard |
| Kerkrade · Limburg | 3.5 | 63 | moderately hard |
| Epe · Gelderland | 3.2 | 58 | soft |