54,487 places · 38 countries
Water hardness by city
Find your city or enter your ZIP / postcode: is the water soft or hard, what it means at home and which filter fits.
soft< 60mg/L CaCO₃
moderately hard60–120mg/L CaCO₃
hard120–180mg/L CaCO₃
very hard> 180mg/L CaCO₃
Countries
- United States1,372 · 9.1 gpg
- United Kingdom471 · 185 mg/L
- Germany809 · 11.5 °dH
- Austria159 · 14 °dH
- Switzerland650 · 26.7 °fH
- France33,641 · 23.9 °fH
- Canada254 · 101 mg/L
- Australia307 · 85 mg/L
- Ireland1 · 138 mg/L
- Netherlands654 · 7.5 °dH
- Spain4,988 · 20.1 °fH
- Italy629 · 21.2 °fH
- Belgium1,091 · 31.6 °fH
- Denmark388 · 14.9 °dH
- Sweden33 · 4.7 °dH
- Estonia28 · 2.32 mmol/L
- Brazil1,915 · 43 mg/L
- Ukraine8 · 2.26 mmol/L
- Poland91 · 245 mg/L
- Czechia1,516 · 1.2 mmol/L
- Slovakia1,113 · 1.9 mmol/L
- Hungary3,053 · 16.1 °dH
- Portugal77 · 83 mg/L
- Finland76 · 3.5 °dH
- Norway89 · 2 °dH
- Greece134 · 237 mg/L
- Romania115 · 16.3 °dH
- Slovenia15 · 11 °dH
- Croatia13 · 339 mg/L
- Bulgaria26 · 1.26 mmol/L
- Luxembourg101 · 18.2 °fH
- Lithuania15 · 2.83 mmol/L
- Latvia3 · 2.22 mmol/L
- South Korea127 · 57 mg/L
- Taiwan265 · 126 mg/L
- Japan228 · 50 mg/L
- Mexico9 · 292 mg/L
- Malta23 · 158 mg/L
Places with data · median hardness