Over £11 million invested to improve waste water treatment in Surrey and West Sussex
New treatment processes and increased capacity at Chiddingfold and Northchapel sites enhance phosphorus removal and support healthier local watercourses.
Last updated 1st Sep 2025
Two wastewater treatment works in Surrey and West Sussex have received over £11 million in upgrades to improve the quality of water leaving the sites.
The improvements at Chiddingfold in Surrey and Northchapel in West Sussex include new treatment processes to remove more phosphorus, updated filter technology, and increased site capacity.
Approximately £6.9 million was spent at Chiddingfold, and £4.6 million at Northchapel. The work was carried out by GTb on behalf of Southern Water.
Andrew Dredge, Project Manager for GTb, said the teams worked hard to meet regulatory deadlines and that the final steps now involve clearing the sites.
Ben Gogan, Project Manager for Southern Water, added that the upgrades will benefit local watercourses and form part of ongoing efforts to improve water quality.