My water supply

Water hardness

When water falls as rain, it's "soft" and free of minerals.

It picks up naturally occurring minerals, such as calcium and magnesium, as it passes through rock, sand and soil. This causes the water to become ‘hard.’

All the water we supply is ‘hard’ together with more than 60% of homes in the UK.

The picture shows a comparison with other areas in the UK.

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Find out how hard water is in your area

Our area is divided into 19 water quality zones. To access the correct hard water reading:

1.  Find the water quality zone for your area

2. Use the water quality zone to read the table below

Zone Zone Name mg/l or ppm CaCO3 Degrees Clark Degrees French Degrees German
BB Barr Beacon 206.3 14.4 20.6 11.6
BB1 Barr Beacon 1 207.5 14.5 20.8 11.6
BUR Burton 228.6 16.0 22.9 12.8
CH Cannock High 190.4 13.3 19.0 10.7
CW Cawney Hill 163.6 11.5 16.4 9.2
GLA Glascote 236.5 16.6 23.7 13.2
HG Hayley Green 167.6 11.7 16.8 9.4
HW Hopwas 224.8 15.7 22.5 12.6
RCL Rugeley Cannock Low 165.7 11.6 16.6 9.3
SGD Sedgely Darlaston 157.1 11.0 15.7 8.8
SP Springsmire 217.3 15.2 21.7 12.2
SU Sutton Coldfield 203.3 14.2 20.3 11.4
SV Shavers End 173.8 12.2 17.4 9.7
SV2 Shavers End 2 171.1 12.0 17.1 9.6
UTT Uttoxeter 262.2 18.4 26.2 14.7
WA Walsall 172.6 12.1 17.3 9.7
WA1 Walsall 1 171.0 12.0 17.1 9.6
WB West Bromwich 161.7 11.3 16.2 9.1
WIN Winshill 352.5 24.7 35.2 19.7