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 Alkalinty (Average mg/l) Calcium (Average mg/l) Magnesium (Average mg/l) mg/l or ppm CaCO3 Degrees Clark  Degrees French  Degrees German 
BB Barr Beacon  132.0 56.98 10.10 183.9 12.9 18.4 10.3
BB1 Barr Beacon 1 133.3 60.00 14.30 208.7 14.6 20.9 11.7
BUR1 Burton 1 138.3 60.30 14.72 211.2 14.8 21.1 11.8
BUR2 Burton 2 138.3 61.46 14.90 214.8 15.0 21.5 12.0
CH Cannock High 144.9 69.19 5.02 193.4 13.5 19.3 10.8
CW Cawney Hill  108.9 47.96 7.34 150.0 10.5 15.0 8.4
GLA Glascote  154.6 74.70 11.20 232.6 16.3 23.3 13.0
HG Hayley Green 102.4 49.24 8.30 157.1 11.0 15.7 8.8
HW Hopwas 149.9 73.61 13.40 239.0 16.7 23.9 13.4
RCL Rugeley Cannock Low 93.89 38.50 6.43 122.6 8.6 12.3 6.9
SGD Sedgely Darlaston 100.2 41.36 6.76 131.1 9.2 13.1 7.3
SP Springsmire  153.7 71.93 8.21 213.4 14.9 21.3 12.0
SU Sutton Coldfield  138.4 62.00 10.82 199.4 14.0 19.9 11.2
SV Shavers End  119.8 59.19 7.49 178.6 12.5 17.9 10.0
SV2 Shavers End 2 121.1 59.53 7.84 180.9 12.7 18.1 10.1
UTT Uttoxeter 220.9 80.63 14.46 260.8 18.3 26.1 14.6
WA Walsall  95.7 38.98 6.80 125.3 8.8 12.5 7.0
WA1 Walsall 1 108.2 38.87 6.57 124.1 8.7 12.4 6.9
WB West Bromwich  98.0 40.26 6.76 128.4 9.0 12.8 7.2
WIN Winshill 252.5 94.97 31.82 368.1 25.8 36.8 20.6