How Hard is My Water

hard water UK map

It's obvious from the scum deposits on surfaces and appliances when your water is hard, but just how hard is it? You can use the links on this page to find out.

Hard water contains dissolved minerals, Calcium and Magnesium salts. Water hardness is measured by the concentration of these elements and is quoted in milligrams per litre (mg/l). Here are the various water classifications:

  • Soft water 0 to 60 mg/l
  • Moderately hard water 60 to 120 mg/l
  • Hard water 120 to 200 mg/l
  • Very hard water above 200 mg/l

Find Out How Hard Your Water Is

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