Average 75 ppm across 29 postcodes and 1 towns.
The average water hardness in Teesside is 75 ppm, classified as slightly hard. Across 29 postcode districts in the North East region, hardness ranges from 54 ppm to 103 ppm.
Teesside is served by Northumbrian Water. 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 Teesside report changes to hardness levels.