Skip to content

If you would like to know about water hardness, please take a look at the below factsheet.

This will tell you about how water hardness is measured, the Regulatory Limits and what affects hard water has on your household.

To find out about the water hardness in your area, please see the map of England and Wales, which details this variation.

UK Hard Water Map

UK Hard Water Map

If you would like to talk to IWNL about any of the issues covered in the below factsheet, please contact us on 02920 028 711 or , or e-mail us at enquiries@iwnl.co.uk.