1,887 plants indexed. Showing 1,857 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.
Kidwelly Wastewater Treatment Works STW is a secondary treatment plant serving 4,420 people in Kidwelly, Wales. It discharges 984.05 cubic meters of treated effluent daily, located near the coast.
Llanmadoc WWTW Britania Inn Llanmad STW is a secondary treatment plant serving about 1,981 people in Llanmadoc, Wales. It discharges 441.04 m³/day of treated wastewater into the local environment.
Pontyates WWTW (Llanelli STW) is a secondary treatment plant in Pont-iets, Wales, serving about 2,800 people. It discharges treated wastewater near the coast, operating under UK regulations.
Trimsaran WWTW Spudder Bridge Rd STW is a secondary treatment plant serving 2,740 people in Carmarthenshire, Wales. It discharges 610.02 m³/day of treated effluent near the coast.
Pembrey Wastewater Treatment Works STW is a secondary treatment plant in Carmarthenshire, Wales, serving 2,262 people. It discharges 503.60 m³/day of treated effluent near the coast.
Llandovery Wastewater Treatment STW is a secondary treatment plant serving the town of Llandovery in Carmarthenshire, Wales. It discharges treated effluent into local waterways, supporting the region's water quality.
ADPAR WWTW serves Newcastle Emlyn, Wales, treating wastewater for approximately 1,883 people. The plant operates at secondary treatment level under UK regulations, discharging into local watercourses.
Whitland WWTW is a secondary treatment plant serving 1,925 people in Carmarthenshire, Wales. It discharges 428.57 m³/day of treated wastewater within 10 km of the coast.
Llanybydder WWTW is a secondary treatment plant in Ceredigion, Wales, serving around 1,991 people. It discharges treated wastewater into local watercourses within the Teifi River catchment.
Neyland WWTW is a secondary treatment plant in Pembrokeshire, Wales, serving approximately 4,142 people. It discharges treated wastewater near the Cleddau Estuary, a coastal waterbody.
FFAIRFACH WWTW is a secondary treatment plant serving Llandeilo, Wales, UK. It treats wastewater for approximately 2,895 people with a designed capacity of 3,472 m³/day and an average discharge volume of 644.53 m³/day.
DREFACH_VELI STW is a secondary treatment plant in Waungilwen, Carmarthenshire, Wales, serving approximately 2,445 people. It discharges 544.34 m³/day of treated wastewater, with a designed capacity of 2,519 m³/day.
Crosshands S STW is an advanced wastewater treatment plant serving Cross Hands, Wales, UK. It treats wastewater for a population of 3,261 and discharges 726.01 cubic meters per day.
Resolven STW Storm Tanks Neath STW is a secondary treatment plant serving Melincourt, Wales. It discharges treated wastewater near the coast, with a designed capacity of 2988 m³/day.
TALGARTH STW BRONLLYS ROAD is a secondary treatment plant serving Bronllys, Powys, Wales. It treats wastewater for approximately 2,911 people with a designed capacity of 3,081 m³/day.
Rhayader STW is a secondary treatment plant serving approximately 2,105 people in Rhayader, Powys, Wales. It discharges treated wastewater into the local river system within the Wye catchment.
PRESTEIGNE STW CLATTERBROOM STW is a secondary treatment plant serving Presteigne, Wales, UK. It treats wastewater for a population of 2,262 with a designed capacity of 2,589 m³/day and a discharge volume of 503.6 m³/day.
Builth Wells STW STW is a secondary treatment plant in Llanelwedd, Wales, serving approximately 3,034 people. It discharges treated wastewater into the local catchment, contributing to the protection of the River Wye and downstream environments.
Knighton STW is an advanced wastewater treatment plant serving approximately 3,021 people in Knighton, Powys, Wales. It operates under UK regulations with a designed capacity of 3,500 m³/day.
LLANIDLOES STW is a secondary treatment plant serving approximately 3,280 people in Llanidloes, Wales. It discharges 730.24 m³/day of treated wastewater, with a designed capacity of 3,500 m³/day.
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 20 plants linked to this operator.
Among the indexed plants, KIDWELLY WASTEWATER TREATMENT WORKS STW has the highest designed capacity at 4,420 m3/day.