South East Water water hardness
Ranges from hard to very hard across the supply area.
South East Water supplies water ranging from hard to very hard across its area, so the figure for your own postcode is worth checking.
Chalk and greensand across the South East. Consistently hard to very hard.
What this means for your home
You have very hard water — among the hardest in the UK.
Limescale will be a constant in your home and a real cost in appliance life. A water softener is genuinely worth the investment here and most households who fit one notice the difference within days. At the very least, protect the boiler.
Where South East Water supplies
Regions: South East England
Counties and areas: Kent, Sussex, Surrey, Hampshire, Berkshire
Supply boundaries do not follow county boundaries, and several companies may supply parts of the same county. Always check your own postcode.