Serving parts of North West London and the Home Counties.

Check your water hardness


Our supply area has, in general, ‘hard’ or ‘very hard’ water. The hardness occurs naturally and is characterised by the presence of higher levels of calcium and magnesium. These minerals are beneficial for healthy teeth and bones.

Use our search below to find out the water hardness levels for your area:


Dishwasher and Washing machine settings

As a guide the information may help you to set your dishwasher and washing machine. We recommend you seek specialist advice when doing this and always follow the appliance instructions.



This information is taken from historic results of monitoring and may be subject to change. This information is provided as a guide only and is subject to our terms and conditions.