Dŵr Cymru Welsh Water has extended the consultation period for its proposed Dŵr Cymru Welsh Water’s Cwm Taf Water Supply Strategy – the company’s largest ever infrastructure project.
Local communities, stakeholders and customers will be able to submit their feedback on the plans until Monday 5 January 2026, to allow more people to have their say on the strategy.
The company is currently holding two consultations on their proposals to invest in new and resilient water treatment works and supporting facilities.
One proposal involves building a new water treatment works at Dan-y-Castell Farm in Merthyr Tydfil, close to the A465 Heads of the Valleys Road, along with a new pumping station at their Pontsticill site, to replace the existing Pontsticill Water Treatment Works.
The other proposal involves upgrading the existing Llwyn-onn Water Treatment Works, which will allow the decommissioning of Cantref Water Treatment Works that was originally built back in 1926.
Together the plans will modernise the drinking water network across South Wales, replacing century-old treatment facilities and increasing clean water storage capacity.
Welsh Water need to deliver both proposals to meet their legal duty to upgrade the water treatment processes in the area. This investment is an opportunity to future-proof water services, ensuring a resilient, sustainable supply of safe clean drinking water to people across Merthyr Tydfil and the surrounding areas.
Two statutory pre-application consultations were launched in October 2025 to gather the views of residents and stakeholders on the company’s plans, before planning applications are submitted to Merthyr Tydfil County Borough Council and the Bannau Brycheiniog National Park Authority.
Ian Christie, Managing Director of Water, Asset Planning and Capital Delivery at Dŵr Cymru said:
“We recognise the importance of this project to local communities and have been pleased to meet so many people at the public events we’ve held to date. These meetings have been an opportunity for us to hear what the local residents think of our plans.
“We are extending the consultation for a further month as we want to ensure that everyone has an opportunity to have their say on the proposals. We’re particularly keen to hear from our customers and the local communities about how we can maximise environmental and community benefits and minimise disruption”.
Click here to view the consultation materials and submit feedback
www.dwrcymru.com/cwmtafstrategy.
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