The works take waste from customers’ homes and local industry and treat it to the high standards required so that it can be returned to the environment.
Work will start at the end of July on the project, which will ensure the site’s resilience and help maintain the quality of the final effluent released, reducing the risk of pollution.
A new inlet works will be constructed and installed, along with work to the site’s filtration and distribution systems.
Northumbrian Water’s partner, Esh-Stantec, will carry out the work, which is expected to take 13 months to complete.
Project Manager Ian Davison said: “This is an investment in making Hexham STW fit for the future and one that also helps protect the environment, by ensuring we can continue to meet the high standards to which we treat the area’s wastewater.
“With the site positioned among Hexham’s industrial area, we do not anticipate any impact upon customers, however, people can follow progress at www.nwlcommunityportal.co.uk, navigating to the Hexham STW Refurbishment page.”