The decade long deals have been awarded to Esh Construction and MWH in a joint venture, Mott MacDonald Bentley, Interserve and Integrated Water Services.
This will see the contractors help Northumbrian Water maintain its water quality, reduce sewer flooding, and protect the environment.
The deals will begin at the start of October and run across both Northumbrian Water’s north east region and its Essex and Suffolk region.
Northumbrian Water Group’s head of asset delivery John McGovern said: “These partnership agreements clearly demonstrate our commitment to providing our customers, who rely on us every day, with an excellent service and to protecting the environment.”
He added: “Having long-term framework agreements in place will enable better planning, relationship building and the transfer of in-depth knowledge and skills.
“As a result of the security that this work brings, those who have won contracts will also be able to further invest in their own businesses, people and systems.”