1,887 plants indexed.
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.
DIDCOT FOXHALL ROAD DIDCOT O STW is a wastewater treatment plant serving approximately 34,300 people in South Oxfordshire, England. It operates under the UK's regulatory framework for wastewater treatment.
London Deepham STW serves 887,000 people in Greater London, England. The plant treats wastewater under the EU Urban Waste Water Treatment Directive, discharging into the River Lee catchment which flows to the Thames Estuary.
London Crossness STW is a major wastewater treatment plant serving approximately 1.84 million people in Greater London, United Kingdom. It discharges treated effluent into the River Thames, contributing to the protection of the Thames Estuary ecosys
London Crawley STW is a municipal wastewater treatment plant serving Crawley, West Sussex, England. It treats wastewater from approximately 149,000 people, operating under UK regulations aligned with the EU Urban Waste Water Treatment Directive.
Cranleigh Surrey STW serves approximately 13,500 people in Waverley, England. The plant operates under the UK's urban wastewater treatment regulations, ensuring compliance with environmental standards.
Cirencester Glos STW serves the Cotswold area of Gloucestershire, England, treating wastewater for approximately 29,600 people under the UK's regulatory framework.
Church Hanborough Church Hanbo STW serves West Oxfordshire, England, treating wastewater for approximately 6,510 people under the UK's Urban Waste Water Treatment Regulations.
Cholsey Cholsey Wallingford STW serves approximately 16,200 people in South Oxfordshire, England. The plant discharges treated wastewater into the River Thames catchment, supporting local water quality.
CHOBHAM STW serves 11,400 people in Surrey Heath, England. The plant operates under the UK's wastewater regulatory framework, discharging treated effluent to local watercourses.
Chipping Norton Worcester Road STW serves approximately 8,750 people in West Oxfordshire, England. The plant operates under UK wastewater regulations, treating sewage from the local community before discharge.
Chinnor Chinnor Oxon STW is a wastewater treatment plant serving approximately 7,640 people in South Oxfordshire, England. It operates under UK regulations implementing the EU Urban Waste Water Treatment Directive.
Chieveley Chieveley Berks STW serves approximately 5,000 people in West Berkshire, England. The plant treats wastewater from the village of Chieveley before discharging into the local water environment.
Chesham Bucks STW serves approximately 36,000 people in Chesham, England. The plant operates under the UK's wastewater regulatory framework, discharging treated effluent into local watercourses.
Chertsey Lyne Lane Chertsey STW is a wastewater treatment plant in Runnymede, Surrey, England, serving approximately 85,500 people. It operates under the UK's regulatory framework for wastewater treatment.
Cassington Yarnton Road Cassi STW is a wastewater treatment plant serving West Oxfordshire, England, UK. It treats wastewater for approximately 15,500 people under the EU Urban Waste Water Treatment Directive.
Carterton Carterton Oxon STW serves approximately 15,500 people in West Oxfordshire, England. The plant discharges treated wastewater into local watercourses within the Thames River basin.
Camberley Surrey STW serves 139,000 people in Surrey Heath, England. The plant operates under the UK's implementation of the EU Urban Waste Water Treatment Directive, ensuring regulatory compliance for large agglomerations.
CADDINGTON STW serves Dacorum, Hertfordshire, England, treating wastewater for approximately 5,590 people. The plant discharges into local waterways under UK environmental regulations.
BYFIELD BYFIELD NORTHANTS STW serves approximately 4,900 people in Byfield, England. The plant discharges treated wastewater into local watercourses within the West Northamptonshire area.
BURSTOW STW is a wastewater treatment plant serving Smallfield, England, United Kingdom. It serves a population of approximately 7,890 and is located inland in Surrey.
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 1 plant linked to this operator.
Among the indexed plants, LONDON Crossness STW has the highest designed capacity at 1 m3/day.