1,887 plants indexed. Showing 946 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.
NEWTOWN STW serves Abermule, Powys, Wales, treating wastewater for approximately 15,954 people. The plant operates under the UK's implementation of the EU Urban Waste Water Treatment Directive.
BRYNMAWR STW BLACKROCK BRYNMAWR STW serves the Darrenfelen area in Blaenau Gwent, Wales, treating wastewater for a population of approximately 5,578 under UK regulations.
BRECON STW serves Brecon, Powys, Wales, treating wastewater for approximately 8,500 residents. The plant discharges into the River Usk catchment, supporting local water quality in the Brecon Beacons region.
LLANFOIST SEWAGE TREATMENT WORKS ME STW serves Abergavenny, Wales, treating wastewater for approximately 15,368 people. The plant operates under UK regulations and discharges into the local water environment.
CYNON VALLEY STW serves Pontypridd, Wales, treating wastewater for approximately 64,156 people. The plant operates under UK regulations aligned with the EU Urban Waste Water Treatment Directive.
Aberbaiden STW Behind Hop Yard Farm STW serves Govilon, Monmouthshire, Wales. The plant treats wastewater for approximately 5,359 people under UK and EU regulatory frameworks.
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.
North Ely Valley STW serves Llantrisant, Wales, treating wastewater for over 13,000 people. The plant discharges into local watercourses within the Severn Estuary catchment.
Merthyr Tydfil STW is a municipal wastewater treatment plant serving Pontypridd, Wales, United Kingdom. It serves a population of approximately 70,624 and operates under UK environmental regulations.
CEFN MAWR STW HEOL BERWYN CEFN MAWR STW is a wastewater treatment plant in Cefn Mawr, Wales, serving approximately 6,428 people. It operates under UK regulations and discharges into local waterways.
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.
BUCKLEY STW serves Buckley, Wales, treating wastewater for approximately 14,791 people. The plant operates under UK regulations aligned with the EU Urban Waste Water Treatment Directive.
LLANDYRNOG S STW serves approximately 9,770 people in Llandyrnog, Denbighshire, Wales. The plant operates under the UK's wastewater regulatory framework, discharging treated effluent into local watercourses.
DEE STW is a wastewater treatment plant serving approximately 127,500 people in Worthenbury, Wales, United Kingdom. It discharges treated effluent into the local water environment.
LAVISTER STW STW serves the Pulford area in Cheshire West and Chester, England. The plant treats wastewater for a population of approximately 4,653 under UK environmental regulations.
Hope STW STW serves Caergwrle, Wales, treating wastewater for approximately 8,373 people. The plant operates under UK regulations, discharging into local watercourses.
Whitchurch STW serves the town of Whitchurch in Shropshire, England, treating wastewater for a population of approximately 10,852. The plant operates under UK regulations implementing the EU Urban Waste Water Treatment Directive.
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.
Ross Lower Cleeve WWTW serves Ross-on-Wye, England, treating wastewater for approximately 18,157 people. The plant discharges into the River Wye, a key tributary of the Severn Estuary.
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 16 plants linked to this operator.
Among the indexed plants, BRYNMAWR STW BLACKROCK BRYNMAWR STW has the highest designed capacity at 1 m3/day.