Dwr Cymru Welsh Water

COVID-19 (Coronavirus) – A Message to Our Customers - 30 March 15:00

We know that this is a difficult time. We also know that the water and wastewater services we provide play a key role in protecting public health and safeguarding the customers and communities we serve.

We are doing all we can to protect our colleagues while also maintaining our services to customers. You will still see us working in streets and communities during this time but we are only doing essential work that will help protect public health by maintaining water and wastewater services to customers.

Our Billing Call Centre is open from 9am - 5pm (Monday to Friday) to support our most vulnerable customers who have been impacted by the Coronavirus.

If you’re impacted by COVID-19 (Coronavirus) and concerned about your water bill, please click here for more information.

If you need to contact us about other things like updating your account, to let us know you are moving or to set up a direct debit, you can do this by visiting our online services.

We will keep you informed of any other changes through updates on this site and via our social media channels - Facebook & Twitter.

We apologise for this but will do everything we can to continue providing our essential services. Thank you for bearing with us.

Q. My water has a milky appearance?


Milky water is usually caused by air getting into the system. Tiny air bubbles can form in the water as it’s drawn from the tap giving it the milky or cloudy appearance you are seeing. Water with air bubbles is perfectly safe to drink.

Here’s a glass test you can do to see if the milky appearance is due to air bubbles -

  • Fill a glass of cold water from the tap.
  • See if it clears from the bottom to the top.
  • If it does, this indicates the milkyness is due to air bubbles and that the water is fine to drink.

Air can get into water pipes in various ways – sometimes it can happen when we’ve been working on the water mains in the street. The appearance of air in water can also be caused by internal plumbing, the most common cause is when cold water pipes sit too close to hot water or central heating pipes. Warm water holds less dissolved air than cold water so when the cold water is warmed in the pipe air bubbles will form which results in the water appearing milky. This milky appearance should clear if you flush the tap until the water runs cold and you can prevent it from happening by insulating the pipes to stop the cold water warming up.

If your water doesn’t clear in the glass test above and the milky water is persistent, affecting all your taps and not affecting neighbours, then please contact us for further advice.


Please have a look at this factsheet to find out more information:

water quality

Advice and Information

Check out our Water Worries page for more information and advice on your water supply

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