Sat, Nov 01, 2025
Text Size
Thursday, 30 October 2025 10:02

Consultation begins on Dŵr Cymru Welsh Water’s largest ever infrastructure project

Dŵr Cymru Welsh Water has launched a new consultation on the largest infrastructure project in the company’s history – the Cwm Taf Water Supply Strategy.

WELSH WATER Proposed Llwyn-onn Water Treatment Works Upgrade computer generated image  for illustrative purposes only

Proposed Llwyn-onn Water Treatment Works Upgrade

(computer generated image – for illustrative purposes only)

The plans will modernise the drinking water network across South Wales, replacing century-old treatment facilities and increasing clean water storage capacity.

Welsh Water’s proposals involve building a new water treatment works at Dan-y-Castell Farm in Merthyr Tydfil, close to the A465 Heads of the Valleys Road. The plans also include a new pumping station at Pontsticill, to replace the existing water treatment works at the site.

Proposals include 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.

Welsh Water will need to deliver both proposals to meet their legal duty to upgrade the water treatment processes in the area.

The investment is an opportunity to future-proof water services in the area, ensuring a resilient, sustainable supply of safe clean drinking water for nearly half of the company’s customers.

Two statutory pre-application consultations have been launched to gather the views of local 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.

Turning a century-old system into a 21st-century solution

Ian Christie, Managing Director of Water, Asset Planning and Capital Delivery at Dŵr Cymru said:

“We’re facing a critical water security challenge in Wales. Ageing infrastructure can’t meet modern challenges – this strategy is a once in a generation opportunity to change that.

“We must ensure we can continue to provide a safe, reliable supply of drinking water every day of the year to our customer base in the face of climate change, population growth, and ageing infrastructure.

“This is about turning a century-old system into a 21st-century solution. The plans are now open for consultation, and we want to hear your views.

“We’re keen to hear from our customers and the local communities about how we can maximise environmental and community benefits and minimise disruption.”

The two consultations provide an opportunity for the local community, stakeholders and customers to review the plans and draft planning application documents, and to provide comments, before the company apply for planning permission.

Community events will also be held to give residents the opportunity to meet the project team and learn more about the plans.

These will take place on:

  • Thursday 6th November — 3pm-6pm, Pontsticill Memorial Hall, CF48 2RU
  • Thursday 13th November — 2pm-7pm, Cefn Coed Community Hall, CF48 2NA
  • Wednesday 26th November — 3pm-6pm, Nant Ddu Lodge & Spa, CF48 2HY
  • Thursday 4th December — 1pm-5:30pm, Merthyr Tydfil Central Library, CF47 8AF

Click here to access consultation materials and submit comments to the consultation

 

News Showcase

Sign up to receive the Waterbriefing newsletter:


Watch

Click here for more...

Login / Register




Forgot login?

New Account Registrations

To register for a new account with Waterbriefing, please contact us via email at waterbriefing@imsbis.org

Existing waterbriefing users - log into the new website using your original username and the new password 'waterbriefing'. You can then change your password once logged in.

Advertise with Waterbriefing

WaterBriefing is the UK’s leading online daily dedicated news and intelligence service for business professionals in the water sector – covering both UK and international issues. Advertise with us for an unrivalled opportunity to place your message in front of key influencers, decision makers and purchasers.

Find out more

About Waterbriefing

Water Briefing is an information service, delivering daily news, company data and product information straight to the desks of purchasers, users and specifiers of equipment and services in the UK water and wastewater industry.


Find out more