1,887 plants indexed. Showing 391 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.
NEWPORT STW serves approximately 275,000 people in Newport, Wales, as part of the UK's wastewater infrastructure. The plant discharges into the Severn Estuary, a major tidal water body with significant ecological importance.
PONTHIR STW is a wastewater treatment plant serving approximately 93,987 people in Newport, Wales, United Kingdom. It operates under the EU Urban Waste Water Treatment Directive, which mandates secondary treatment for agglomerations of this scale.
SOUTH ELY VALLEY STW serves approximately 43,596 people in the Vale of Glamorgan, Wales. The plant operates under the EU Urban Waste Water Treatment Directive, ensuring secondary treatment for this medium-sized agglomeration.
Cowbridge STW serves the town of Cowbridge in the Vale of Glamorgan, Wales, treating wastewater for approximately 6,545 people. The plant is located near the coast and discharges into local watercourses.
Rhuddlan WWTW Final STW serves Rhyl, Wales, treating wastewater for approximately 6,060 people. The plant operates under UK regulations and discharges into local watercourses.
QUEENSFERRY STW serves approximately 52,000 people in Queensferry, Wales. The plant discharges treated wastewater into the Dee Estuary, a sensitive coastal environment.
FLINT STW serves approximately 23,335 people in Flint, Wales. The plant operates under the EU Urban Waste Water Treatment Directive, which mandates secondary treatment for agglomerations of this scale.
LLANASA STW serves approximately 31,500 people in Pen-y-ffordd, Flintshire, Wales. The plant is located within 50 km of the coast and discharges treated effluent into local watercourses.
Peacehaven Wastewater Treatment Works serves approximately 273,000 people in East Sussex, England. The plant discharges treated effluent into the English Channel, supporting coastal water quality.
Truro Newham STW serves approximately 28,367 people in Truro, Cornwall, England. The plant discharges treated wastewater into the local water environment near the Truro River estuary.
Neston STW is a wastewater treatment plant serving approximately 18,075 people in Neston, England. Located near the Dee Estuary, it plays a key role in protecting the local aquatic environment.
Heswall Sewage Treatment Works STW serves approximately 9,300 residents in Heswall, Wirral, England. The plant operates under the UK's wastewater regulatory framework and discharges into the local water environment.
COLEFORD STW serves approximately 26,098 people in Forest of Dean, England. The plant operates under the UK's implementation of the EU Urban Waste Water Treatment Directive, ensuring appropriate treatment for inland discharge.
Wotton Under Edge STW serves approximately 5,772 people in Stroud, Gloucestershire, England. The plant operates under UK wastewater regulations and discharges treated effluent into the local water environment.
WOOL STW serves Bovington, Dorset, England, treating wastewater for approximately 9,456 people. The plant operates under UK regulations, discharging into the local catchment that drains to the English Channel.
Wimborne STW serves approximately 21,900 people in Wimborne Minster, England. The plant operates under UK regulations and discharges treated effluent into the local water environment.
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 Dŵr Cymru / Welsh Water. UtilityRadar's records show 8 plants linked to this operator.
Among the indexed plants, NEWPORT STW has the highest designed capacity at 1 m3/day.