
Famous for its dramatic coastline, Pembrokeshire Coast National Park and the Afon Cleddau SAC, Pembrokeshire is home to over 123,000 people and thousands of visitors flock to the area every year. As a business, Welsh Water has 80 wastewater treatment works and 2 water treatment works, as well as 904km of sewers and 2,259km water pipes to serve this county.
Over the next five years, our investment programme for Pembrokeshire will concentrate on environmental improvement to help reduce the impact on the Afon Cleddau SAC. The programme will also aim to improve resilience in the drinking water network by replacing water pipes in areas that have experienced interruptions to water supplies.

We are investing over £4 million to upgrade Rosemarket Wastewater Treatment Works. The new RBC (rotating biological contractor) treatment process will improve the quality of treated water and benefit the Afon Cleddau.

We are allocating £3.1 million to upgrade approximately 15km of water pipes in the Llechryd drinking water zone, which includes areas such as Star and Tegryn in Pembrokeshire. This essential project aims to enhance the drinking water network in the area and ensure a reliable supply of water.
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 is an example of the work carried out in your area during the previous investment period 2020-2025.

We recently invested £4 million to upgrade the Canaston Bridge raw water pumping station, enhancing the resilience of the Pembrokeshire water supply network. This involved refurbishing the station, upgrading the power supply, and improving pump speed control. The work started in September 2023 and was completed by March 2024.

We invested £5.5 million to upgrade the wastewater treatment works in Spittal, Pembrokeshire, enhancing water quality in the Afon Cleddau. The improvements include removing phosphates from treated wastewater, benefiting the river and its aquatic life. This project started in December 2023 and finished in April 2025.