1,887 plants indexed. Showing 320 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.
Wargrave Wargrave Berks STW serves approximately 120,000 people in Wargrave, England. The plant discharges treated wastewater into the River Thames catchment, supporting local water quality.
Hertford STW serves approximately 393,000 people in East Hertfordshire, England. The plant discharges treated wastewater into local watercourses within the Thames River Basin.
London Riverside STW serves 398,000 people in Greater London, UK. The plant operates under the EU Urban Waste Water Treatment Directive, which mandates secondary treatment for agglomerations of this scale.
London Mogden STW serves 1.96 million people in Greater London, England. It discharges treated wastewater into the River Thames, which flows through London to the North Sea.
Maple Lodge Bucks STW serves approximately 499,000 people in Greater London, England. The plant operates under the UK's regulatory framework for wastewater treatment.
Maidenhead Braywick Road Maid STW serves 82,200 people in Maidenhead, England. The plant operates under the UK's Urban Waste Water Treatment Regulations, which implement the EU Urban Waste Water Treatment Directive.
LUTON STW serves approximately 158,000 people in East Hyde, England. The plant operates under the UK's implementation of the EU Urban Waste Water Treatment Directive, ensuring regulatory compliance for large agglomerations.
London Long Reach STW in Dartford, England serves approximately 858,000 people. The plant operates under the UK's implementation of the EU Urban Waste Water Treatment Directive.
Little Marlow STW serves Buckinghamshire, England, treating wastewater for approximately 164,000 people. The plant operates under UK regulations aligned with the EU Urban Waste Water Treatment Directive.
London Hogsmill Valley STW is a major wastewater treatment plant in Greater London, UK, serving approximately 391,000 people. It operates under the UK's regulatory framework derived from the EU Urban Waste Water Treatment Directive.
ESHER FARM ROAD ESHER SURREY STW serves approximately 114,000 people in Elmbridge, England, as part of the UK's wastewater infrastructure under the Urban Waste Water Treatment Regulations.
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 Beddington STW is a major wastewater treatment plant serving 366,000 people in Greater London, England. It operates under the UK's regulatory framework for urban wastewater treatment.
London Becton STW serves 3.38 million people in Greater London, England. It is one of the largest wastewater treatment plants in the United Kingdom, discharging treated effluent into the River Thames.
Basingstoke Wildmoor Basingst STW serves approximately 117,000 people in Basingstoke and Deane, Hampshire, England. The plant discharges treated wastewater into the River Loddon catchment, part of the Thames Basin.
WICK ST LAWRENCE STW serves Kingston Seymour, North Somerset, England, treating wastewater for approximately 20,579 people. The plant operates under UK regulations and discharges into local waterways.
Weymouth STW serves approximately 90,629 people in Weymouth, England. The plant is located near the coast and discharges into the English Channel via local watercourses.
Weston-super-Mare STW serves over 100,000 people in North Somerset, England, discharging treated wastewater into the Bristol Channel. The plant operates under UK regulations aligned with the EU Urban Waste Water Treatment Directive.
Burnham on Sea / Highbridge STW serves around 52,000 people in Huntspill, Somerset, England. The plant discharges treated wastewater into local waterways within the Somerset Levels, a low-lying wetland area.
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 Thames Water. UtilityRadar's records show 1 plant linked to this operator.
Among the indexed plants, LONDON Riverside STW has the highest designed capacity at 1 m3/day.