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Tap water

Water quality

We carefully filter, treat and rigorously test your drinking water at each stage of its journey from source to tap – taking samples at reservoirs, treatment works and at customer properties. We carry out millions of tests every year, helping to ensure the water reaching your home is always of the highest quality.

From time to time, you may experience issues such as discolouration. These changes are often harmless and temporary, with a simple explanation and an easy solution.

If your water looks unusual or has an abnormal taste or smell, there are some quick ways you can identify what’s causing the problem and, in many cases, fix it yourself.

Testing water quality

We make sure that your water passes strict tests before it comes out of the taps. Find out what makes it so clean and drinkable.

Check your water quality

Enter your postcode to check water quality in your area

Keep slime & stain free

Find out how you can prevent slime and staining in your kitchen and bathroom.

My water smells/tastes unusual

IIf your water has a unusual taste or smell, click here to see what could be causing this and how to fix it.

My water looks different

If your water appears discoloured, cloudy or has bits in it, click here to see what could be causing this.

Water hardness

The usual signs of a hard water supply are scaling inside kettles, poor lathering of soaps and scum.

Frequently asked questions

If you have a question about your water, click there to view our frequently asked questions.