Knitsley Sewage Treatment Works

As part of the Water Industry National Environmental Programme (WINEP), we will be installing chemical dosing plant (ferric sulphate and sodium hydroxide) and a new tertiary treatment stage to enable the site to meet the forthcoming phosphorous discharge consent. The improvement works will cost around £4m, and it’s one of 27 sites within the NWG region to receive this upgrade. Phosphorous is a nutrient and can cause algae to grow in watercourses, reducing biodiversity and river water quality.

The team are still on site completing the compliance testing, but essentially all works are substantially complete. The cabins on site are scheduled to be removed by January 2026.

Start Date: February 2024

Estimated End Date: Spring 2026

Partner: Galliford Try

Investment Value: £4 million