Burst water main affecting Llanrumney/St Mellons & surrounding areas of Cardiff, CF3

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Updated: 10:45 04 September 2025

Our teams have worked overnight to fix the burst water main and supply bottled water to over 700 vulnerable customers. The burst water main has now been fixed, and water supplies are now restored due to rezoning and tankering operations.

We are in the process of re-filling the network but this needs to be done carefully and slowly to avoid any further bursts. Some customers may still experience intermittent supply, low pressure or discoloured water as things return to normal. The bottled water stations will remain open this morning.

Bottled water stations are available at:

  • Eastern Leisure Centre, Llanrumney Avenue, CF3 4DN
  • Tesco Supermarket, St Mellons, CF3 0EF

We’d like to apologise for the inconvenience this has caused customers.

More information is available here.

Celebrating another developer forum event

Celebrating another developer forum event


25 January 2022

Back in the time before COVID, we used to host two physical developer forums a year. As part of the ‘new normal’, we’ve been hosting these regular engagement events with our developer services customers online.

Attendees include organisations like housebuilders and housing associations, and at our developer forum events we update customers on their priority areas, such as new regulation, improvements we’ve made to our service and hear valuable feedback on how customers were experiencing working with us on new water and sewerage connections.

Last week we hosted our latest developer forum. With over 40 attendees, topics ranged from the issue of phosphate levels when it comes to the planning of new developments to the proposed changes to charging rules that Ofwat consulted on last year.

Feedback on the forum was positive, with attendees rating it 4.4 out of 5 on average. They gave a score of 82% for how satisfied they were with our developer services department’s service in general.

We also launched our new Developer Customer Panel at the event. If the pandemic’s taught us anything, it’s confirmed for us just how important it is for us to regularly engage with our developer customers so that we could hear their concerns and feedback.

We’re looking to set up a brand new customer panel, which will consist of around 10 key customers, who will act as a sounding board for any new ideas and proposed changes and identify ways Welsh Water and customers can work together better. If you’d like to nominate yourself as a member of the Developer Customer Panel, please email kate.anderson@dwrcymru.com.

Finally, we’d like to thank everyone who joined us and made the forum a success. And most of all – thank you to our developer customers for taking part in our virtual format, asking those ever-insightful questions and openly sharing their thoughts on key industry topics.

If you’re interested in attending future developer forums, please email developer.services@dwrcymru.com and we will add you to our mailing list.