About your drinking water


Water glassOverall we continue to supply a very high level of water quality. Achieving a score of 99.96 per cent for the Drinking Water Inspectorate's measure ‘Mean Zonal Compliance’. This means our drinking water complies with strict national guidelines for safety and purity. Performance in this area is assessed by testing samples from our customers' taps to see if they meet against 39 water quality standards.   

Water quality is a particular focus for us in the coming year, introducing improvements to our processes and making sure our assets are fit for purpose.

Find out more about the quality of your drinking water


iconThere's been an improvement in the number of contacts received about discoloured water in 2015/2016. 

As part of our investment over the next five years, we plan to clean some of our large water pipes and make improvements at our water treatment works. This will reduce the risk of discolouration in our drinking water even further.  

Here's how we look after the colour of your water

Taste and smell

nose imageThere was a reduction in the number of taste and odour incidents reported by customers in 2015/2016. This fall meant we outperformed our 2015/2016 target.  

The investment into our assets over the next five years means we'll further reduce the number of taste and odour incidents.  

Find out what some of the most common causes are of taste and smell.


imagesThe majority of our water in the North West is soft or very soft. For more information please take a look at our factsheet on water hardness.




Lead pipeA third of properties in the North West built before 1970 are believed to still have some lead plumbing.

If you do have lead pipes, there’s plenty you can do to minimise the risks to you and your family.


water droplet iconFind out about fluoridation in the North West

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