Average 73 ppm across 40 postcodes and 1 towns.
The average water hardness in Merseyside is 73 ppm, classified as slightly hard. Across 40 postcode districts in the North West region, hardness ranges from 34 ppm to 131 ppm.
Merseyside is served by United Utilities. With slightly hard water, limescale is unlikely to be a major concern in most homes.
Sorted by hardness — tap a town for full details.
Companies supplying water to this county.
Every postcode district in the county, sorted by hardness.
Learn more about water hardness and how to manage it.
Be notified when water companies in Merseyside report changes to hardness levels.