The Water Dictionary

What’s in your tap water?

Enter your UK postcode to see the mineral profile of your local water supply.

Water hardness across the UK

Colour shows average water hardness by postcode area. Click an area to see individual districts.

060120180300
No data

Hardness in mg/L as calcium carbonate

ABALBBABBBDBHBLBNBRBSCACBCFCHCMCOCRCTCVCWDADDDEDGDHDLDNDTDYEECEHENEXFKFYGGLGUHAHDHGHPHRHSHUHXIGIPIVKAKTKWKYLLALDLELLLNLSLUMMEMKMLNNENGNNNPNRNWOLOXPAPEPHPLPOPRRGRHRMSSASESGSKSLSMSNSOSPSRSSSTSWSYTATDTFTNTQTRTSTWUBWWAWCWDWFWNWRWSWVYOZE

Covering 1,292 zones across 19 companies with LSOA-level fallback data across England, Wales and Scotland.