Water hardness – Moderately Hard

The water hardness of where you live is Moderately Hard


  • Possible unsightly water marks or visible scale
  • Limescale could be damaging water using appliances
  • Heating system may not be work at full efficiency due to scale
  • Possible hair and skin issues related to water
  • Time spent cleaning increased
  • More money spent on expensive cleaning products

Around 60% of all UK homes live in a hard water area. Hardness in the UK is usually measured in parts per million (ppm) or milligrams per liter (mg). Calcium carbonate when heated creates limescale deposits around your home.

  • Soft water contains less than 100mg of calcium carbonate per litre.
  • Moderately hard water contains between 100 and 200mg of calcium carbonate per litre.
  • Hard water contains between 200+mg of calcium carbonate per litre.

The average UK household uses 349 litres of water each day. At 300mg per litre water hardness the average UK home will have over 38kg of calcium carbonate flowing through their home each year. This would cause serious limescale dameage to all water using appliances and heating systems.

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