What is Water Hardness?

Rainwater is naturally soft but becomes hard by soaking through the geological layers of clay, chalk and limestone that make up a large proportion of southern England. The water companies extract the water from underground aquifers and in doing so draw up these dissolved minerals into the water supply.

Hard water is that which is designated as having Calcium Carbonate and Magnesium at quantities over 120 parts per million. In Norfolk we typically have around 300ppm or higher so it is classified as very hard or hard water.

The map below is part of the What is Water Hardness leaflet, please click here for the hardness leaflet

Click on the Anglian Water link below and enter your postcode to find out how hard the water is in your area: