WATER SOFTENERS: Hard water areas in the United Kingdom
Generally speaking, hard water is present in 60% of the United Kingdom and to varying degrees in the rest of the country.
The exact degree of water hardness can be obtained from your local water company. They will be able to advise you for your individual postcode address.
However for guidance, the map shows areas of water supply systems with known water hardness.
Soft to moderately soft:
0-100 mg/l as calcium carbonate.
Slightly hard to moderately hard:
100-200 mg/l as calcium carbonate.
Hard to very hard:
above 200 mg/l as calcium carbonate.
For comparison: Your Ensign water softener will reduce water hardness right down to less than 14.3 mg/l.
