The impact of phosphorus stripping at Chesham Sewage Treatment Works on water quality and ecology in the Chess
Date: 24th December 2025
Phosphate is one of the biggest problems for the River Chess. In the Environment Agency’s Water Framework Directive assessment, phosphate status is rated as ‘Poor’ and a key ‘Reason for Not Achieving Good status’ limiting the Chess to its current overall rating of ‘Moderate’. One of the greatest phosphate sources was the Chesham Sewage Treatment Works (STW), so the EA...
