WaterHard.uk

Water Hardness in South West

278 postcode districts • 7 counties

161 PPM 0 200 400
Moderately Hard
161
Average ppm
27
Minimum ppm
291
Maximum ppm
278
Postcodes

Water Hardness Across South West

The average water hardness in the South West region is 161 ppm, classified as moderately hard. Across 278 postcode districts, hardness ranges from 27 ppm to 291 ppm.

The region is served by Severn Trent Water, South West Water, Wessex Water. Water hardness varies by county — see the breakdown below or check your specific postcode.

Counties in South West

County Avg Hardness PPM Level Postcodes
Bristol
238 ppm
238 ppm Hard 37
Gloucestershire
233 ppm
233 ppm Hard 27
Dorset
225 ppm
225 ppm Hard 37
Wiltshire
211 ppm
211 ppm Hard 29
Somerset
139 ppm
139 ppm Moderately Hard 43
Cornwall
91 ppm
91 ppm Slightly Hard 23
Devon
86 ppm
86 ppm Slightly Hard 82

Water Companies in South West

Severn Trent Water

Avg: 222 ppm Hard

South West Water

Avg: 80 ppm Slightly Hard

Wessex Water

Avg: 231 ppm Hard

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