Costain Group PLC (Costain) announced that its CMDP joint venture with MWH Treatment has been awarded contracts worth £65 million by Southern Water as part of the water company's AMP7 investment programme. The work will run until late 2025 and will see the joint venture improve the resilience of the local water supply and upgrade wastewater treatment works at Testwood near Southampton, and Burham in Kent. The integrated CMDP team will work closely with Southern Water and its engineers to develop cost-efficient solutions, optimize asset performance and deliver the implementation through to the end of AMP7.

Both sites will see major renovation, refurbishment and expansion of existing assets to cope with rising demand for drinking water and increasing volumes of wastewater. This contract extension adds to Costain's growing positions with leading water companies, which include Anglian Water, Northumbrian Water Group, Severn Trent Water, Thames Water, United Utilities and Yorkshire Water.