Icosa Water water hardness
Ranges from hard to very hard across the supply area.
Icosa Water supplies water ranging from hard to very hard across its area, so the figure for your own postcode is worth checking.
A NAV (new appointment and variation) supplier serving specific new developments. Water is bought in bulk from the incumbent, so hardness follows whoever supplies the area — usually Thames or Affinity.
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 Icosa Water supplies
Regions: South East England, London
Counties and areas: Greater London, Essex, Kent
Supply boundaries do not follow county boundaries, and several companies may supply parts of the same county. Always check your own postcode.