Water quality

Providing our seven million customers with a constant supply of safe, high quality drinking water every day is thirsty work! We work around the clock, using our people, technology and the natural water cycle to make sure the North West's homes and businesses have the water they need to keep everything ticking along nicely.

In this section we’ve included some useful information on the tests we carry out on your water to keep it in tip top condition. You can also download a report about the quality of the water in your area by entering your postcode below.

Very occasionally, you may experience issues with your water such as discolouration, especially if we’re repairing a water main in your area following a burst. We’ve provided some advice to help you identify what could be causing a problem together with what you can do to help resolve any issues.  

Check your water quality

Enter your postcode to check water quality in your area

Frequently asked questions

  • You can find this out (along with lots of other interesting facts about your water) by entering your postcode in our water quality search above.

  • Fluoride occurs naturally in most water supplies, though the actual amount present varies depending on the source. Some water supplies can contain fluoride if they originate from sources underground where there are rocks that contain fluoride-rich minerals. In some parts of the North West we are required by Public Health England to raise the fluoridation levels.

    Water supplies in the North West are naturally low in fluoride - and normally contain less than 0.2mg fluoride per litre.

    Some water supplies have fluoride added to raise the concentration to 1.0mg per litre. This figure includes the fluoride that was already there naturally.

  • Changes in the colour of your water can happen if we're carrying out some improvements to the water pipes in your area, or there's been a pipe burst that we've repaired.

    In most cases, discoloured water is not harmful and can be cleared by running the first incoming cold water tap (usually in the kitchen) at a trickle until it clears. If there is no improvement to your water after doing this, please call us on 0345 672 3723 so we can investigate this further to see if there are any issues in your area.

    Click here to find out more about potential causes of discolouration and what to do.

  • Find out about the quality and composition of the water in your area by entering your postcode in our water quality checkbox above.

  • Please call us on 0345 672 3723 if you need further information about your water quality.