Tap water in the Anglian Water region is classed as being hard to very hard.
The ground in this area contains rocks which have high chalk (calcium carbonate) content. As water moves through these rocks it dissolves some of the chalk and this makes the water hard.
Hard water is perfectly safe and there's lots of evidence that it can even be good for our health.
Take a look at our drinking water quality pages for tips on keeping your water healthy and use the postcode search for details of the drinking water quality in your area, including the hardness, to help set up your domestic appliances,.