Drinking water quality
Supplying high quality drinking water at all times is a priority to us. Sometimes things can go wrong, so we've provided some information to help if your water doesn't seem right.
Over the course of a year some 300,000 water tests are taken and analysed, and of the water we supply, 99.96% meet drinking water quality standards at customer taps.
Your water can also be affected by work or incidents in your area. You can check for planned or emergency works near you with our In Your Area service below.
If you require further help or assistance, please call us on 0800 052 0130.
Water Supply
Information Sheets
Browse our leaflets around your water supply, including information on fluoride, iron, manganese and lead.
Check your water hardness and quality
Enter your postcode or find your area and check the top left corner of the map for your water quality.
Information about water quality
Discoloured water is usually caused by the disturbance of deposits in the water pipes. The disturbance of deposits can happen when a water main is shut off due to essential maintenance or in an emergency.
Discoloured water is unlikely to be harmful to health and often resolves within a few minutes once you run your taps, but it might need up to 45 minutes to clear completely.
With our In Your Area service, you can find out if there is any planned or emergency work near you that could affect your water supply.