Sutton & East Surrey Water (S&ESW) serves customers in east Surrey, parts of West Sussex, west Kent and south London. Approximately 650,000 consumers are supplied by the utility. The bulk of S&ESW’s supply – 85 percent – comes from groundwater resources. The remaining 15 percent of the raw water is abstracted from the River Eden and stored at Bough Beech Reservoir. S&ESW invested £17.5 million at its Bough Beech Water Treatment Works (WTW) to increase capacity and ensure long-term security of supply.
Bough Beech’s treatment train is comprised of clarifiers, rapid gravity filters (RGF), granular activated carbon (GAC) adsorption, trihalomethane (THM) stripping, ultraviolet (UV) and chlorination disinfection. Phase 2 of the project raised capacity from 45 Ml/d to 50 Ml/d.