My water is blue 

Find out why your water is blue - and what to do next. 

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Why is my water blue?

Blue water is very rare but when it happens it is usually due to corrosion if you have copper plumbing. The other main cause is blue disinfectant in your toilet cistern siphoning back into the internal plumbing. You may notice this after having plumbing work done or if moving into a refurbished property for the first time.

What to do if your water is blue 

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Contact us 

If your water is blue you should contact us straightaway. 

Contact us today

Any questions?

What are Yorkshire Water doing to reduce the likelihood of discoloured water?

Yorkshire Water has over 31,000 km of mains in the ground and supplies water to almost five million people in the Yorkshire region. The Company has a process to prioritise where mains rehabilitation or cleaning/flushing may be required.

In areas where there is localised historic discolouration, Yorkshire Water operates a programme to flush clean the water mains. Flushing is a proactive and controlled way of removing the sediment which causes discoloured water and therefore reducing the likelihood of it occurring in the future.

We will always let you know when this activity is being carried out in your area. 

The quality of water leaving the water treatment works continues to improve with more effective removal of naturally occurring iron and manganese from the water. Yorkshire Water will continue to replace cast iron mains and will continue to clean many of our large diameter trunk mains where mains deposits are known to be an issue.