Costain JV wins £65m of work with Southern Water

The work, awarded to Costain's joint venture with MWH Treatment, will see the companies improve the resilience of the local water supply and upgrade wastewater treatment works at Testwood near Southampton, and Burham in Kent.

"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," Costain said in a statement.

Costain already works with a number of major water companies across the UK, including Anglian Water, Severn Trent Water, Thames Water and United Utilities.

"We will ensure Southern Water continues providing clean drinking water to its customers while improving its resilience for the future," said chief executive Alex Vaughan.

"This is important work that will have a transformative impact on the lives of residents and local communities, and builds on Costain's growing positions with the leading water companies as they continue to improve the quality of our water supply."