What is Hard Water?


mapDefinition; Hard water is classified as water that contains high levels of minerals such as limestone and chalk


The hardness of your water will vary throughout the country due to the different combinations of ground minerals throughout the UK.  Hard water affects the majority of England and is especially hard in the southeast including Kent.  This is because of the high levels of chalk and magnesium that are found in the ground.  When the naturally soft rainwater falls here the minerals are absorbed into the water making it hard.



Why is hard water a problem?

Have you noticed the scale in your kettle? Around your taps and on your shower screen?  This is the minerals in your hard water being deposited throughout your house.  You may think the scale on your taps and in your kettle isn’t nice but isn’t necessarily a problem however if you consider the scale you can see think about the scale that is being built up in areas you cannot see! Limescale builds up in your boiler and throughout your heating systems as well as inside all of your kitchen appliances cutting their lifespan by a third.


money radiatorThe cost of hard water

The table below shows you just how much more you are spending on heating your home due to the build up of scale in your system.  For an average home the build up of scale will be 1mm per year in hard water areas, this means if you have been using hard water in your home for 5 years your heating system will use more than twice as much fuel to heat and with the rising cost of fuel that really does add up!

Thickness of the Scale Increase in fuel (%)
1/16” – 1/8” 15%
1/8” – 3/16” 25%
3/16” – 1/4″ 39%
1/4″ – 5mm 55%
3/8” – 1/2″ 70%

*Official Government Statistics


Installing a water softener could mean your boiler will be clear of scale in just 6 months and your whole heating system in 2 years!