1,887 plants indexed. Showing 1,266 matching current filters.
The UK's wastewater is treated by 11 regional water companies including Thames Water, Severn Trent, Anglian Water, Welsh Water and Scottish Water, under Ofwat regulation. UtilityRadar indexes 1887 wastewater treatment plants in United Kingdom with a combined designed capacity of 2,480,261 m³/day. The largest plant on file is ROTHERWAS STW FIR TREE LANE HFD STW, treating 76,862 m³/day.
The UK's wastewater is treated by 11 regional water companies including Thames Water, Severn Trent, Anglian Water, Welsh Water and Scottish Water, under Ofwat regulation.
UtilityRadar's directory currently lists 1,887 wastewater treatment plants across United Kingdom. Together these plants represent a combined designed capacity of approximately 2,480,261 m³/day.
By treatment level, the directory contains 598 secondary, 20 advanced, 2 primary-treatment plants. Secondary treatment (typically activated sludge with biological nutrient removal) is the most common standard.
The largest plant indexed for United Kingdom is ROTHERWAS STW FIR TREE LANE HFD STW, with a designed capacity of 76,862 m³/day.
Plant records are aggregated from publicly available regulatory data (US EPA ECHO, EU UWWTD reporting, national water authority publications), augmented by direct operator information and verified via Google Maps coordinates. Each record includes location, treatment level, capacity where known, operator and operational status. To browse plants by treatment level worldwide, see our secondary and advanced filter views, or read our guide to how sewage treatment works.
Winchester N Kingsworthy Harestock STW serves approximately 15,667 people in Winchester, England. The plant operates under the UK's implementation of the EU Urban Waste Water Treatment Directive.
ROMSEY STW serves approximately 20,000 people in Test Valley, England. The plant operates under UK regulations implementing the EU Urban Waste Water Treatment Directive.
Fareham and Gosport Hamble Hedge End Peel Common STW serves approximately 243,000 people in southern England. The plant discharges treated wastewater near Browndown Point, contributing to the protection of local water quality.
Southampton South East Woolston STW serves approximately 65,000 people in Southampton, England. The plant operates under the UK's implementation of the EU Urban Waste Water Treatment Directive.
ANDOVER STW is a wastewater treatment plant serving Test Valley, England, United Kingdom. It treats wastewater for approximately 63,351 people and has a designed capacity of 1.00.
FAWLEY CALSHOT BLACKFIELD STW serves approximately 14,895 people in the New Forest area of Hampshire, England. The plant discharges treated wastewater into the local environment near the Solent.
Portsmouth and Havant STW serves 367,030 people in Portsmouth, England. The plant discharges treated wastewater into the Solent, a strait separating the Isle of Wight from mainland Britain.
Winchester Central and South Morestead STW serves approximately 44,485 people in Winchester, England. The plant operates under the UK's wastewater regulatory framework, treating sewage from the local area.
LYMINGTON PENNINGTON NEW MILTON STW serves the New Forest area in Hampshire, England, treating wastewater for approximately 51,878 people. The plant discharges into local waterways within the Solent catchment.
Southampton West Millbrook STW serves approximately 135,000 people in the New Forest area of Hampshire, England. The plant discharges treated wastewater into the local water environment, contributing to the protection of the Solent and English Channe
SALFORD STW is a wastewater treatment plant serving approximately 101,668 people in Salford, Greater Manchester, England. It operates under the UK's implementation of the EU Urban Waste Water Treatment Directive.
WORSLEY STW in Salford, England serves approximately 22,500 people. The plant operates under the UK's wastewater regulatory framework, discharging treated effluent into local watercourses.
Workington STW serves approximately 58,739 people in Workington, England, as part of the UK's municipal wastewater infrastructure. The plant is located near the coast of Cumbria, discharging into the Solway Firth.
WINSFORD STW serves approximately 33,773 people in Winsford, England. The plant operates under the UK's wastewater regulatory framework, discharging treated effluent into local watercourses.
Windermere STW in Cartmel Fell, England, serves approximately 10,154 people. The plant operates under the UK's wastewater regulatory framework, discharging into the Lake District watershed.
Wilmslow STW serves the community of Styal, England, treating wastewater for approximately 23,377 people. The plant operates under UK environmental regulations.
WIGTON STW serves Micklethwaite, England, treating wastewater for approximately 8,753 people. The plant operates under UK regulations and discharges into the local water environment.
WIGAN HOSCAR STW serves approximately 375,749 people in West Lancashire, England. The plant operates under the UK's implementation of the EU Urban Waste Water Treatment Directive.
WIDNES STW serves approximately 89,286 people in Widnes, England, as part of the Halton wastewater infrastructure. The plant discharges into the Mersey Estuary, a key ecological zone in the Liverpool City Region.
Whitehaven STW in Parton, England serves approximately 34,370 people. The plant is located near the coast and operates under UK wastewater regulations.
UtilityRadar indexes 1887 wastewater treatment plants in United Kingdom, with treatment level, capacity, operator and discharge data on each record.
Among the plants on this page, the most-referenced operator is Southern Water. UtilityRadar's records show 4 plants linked to this operator.
Among the indexed plants, WINCHESTER N KINGSWORTHY HARESTOCK STW has the highest designed capacity at 1 m3/day.