Known as the ‘Garden of Wales’, Carmarthenshire is located in south west Wales and is home to over 187,000.
As a company, Welsh Water has 78 wastewater treatment works and three water treatment works located across Carmarthenshire, as well as 1,482km of sewers and 2,678km water pipes to serve this county.
Over the next five years, our investment programme for Carmarthenshire will be focussed on protecting and improving the environment by aiming our efforts to reduce the impact of our storm overflows in the area, as well as improving resilience in our drinking water network by replacing water pipes in areas which have been impacted by burst water mains.
We’re investing £11.9 million to upgrade over 22km of water pipes in our Bryngwyn drinking water zone, including areas such as Manordeilo, Salem and Cilycwm. This essential work will help to build resilience in the water network and improve the drinking water network in the area.
Every five years we prepare a regulatory business plan which is submitted to Ofwat as part of the Price Review process. The plans are based on customer views and cover our performance commitments, efficiency, investments, and bills. Below are some examples of the work carried out in your area during the previous investment period 2020-2025.
We invested £10.3 million to upgrade Cross Hands Wastewater Treatment Works in Carmarthenshire. The upgrades included a new ferric dosing system, additional sand filters, new tanks, and a pumping station. These improvements will help enhance the quality of the treated water benefitting the Gwili River. The project was completed in March 2025.
We upgraded the spillway and refurbished the dam and tower at Llyn y Fan Fach Reservoir, Carmarthenshire, investing £3.5 million. Work included a precast concrete channel, a new downstream bridge, updated access steelwork for the tower, and renewed valves and pipework. The project was completed in September 2023.