1,887 plants indexed. Showing 476 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.
L_FR PG WWTW STW is a secondary treatment plant in Llanfairpwllgwyngyll, Wales, serving 3,399 people. It discharges 756.74 m³/day of treated wastewater and is located within 10 km of the coast.
LLANFAIRFECN STW is a secondary treatment plant serving 3,770 people in Abergwyngregyn, Wales. It discharges 839.33 m³/day of treated wastewater and is located within 10 km of the coast.
Llanrug WWTW STW is a secondary treatment plant serving approximately 3,452 people in Llanrug, Wales, UK. It discharges treated wastewater into the local environment near the coast.
NARBERTH WES STW is a secondary treatment plant serving 2,514 people near Canaston Bridge, Pembrokeshire, Wales. It discharges treated wastewater into the local catchment, with a designed capacity of 3,668 m³/day.
ST CLEARS WWTW STW is a secondary treatment plant in St Clears, Wales, serving approximately 2,827 people. It discharges treated wastewater near the coast, operating under UK regulations.
Langdon WWTW Begelly Pembrokeshire STW is a secondary treatment plant serving 1,589 people in Jeffreyston, Wales. It discharges 353.77 m³/day of treated wastewater near the Pembrokeshire coast.
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.
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.
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.
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.
USK STW Graig Olway Farm Llangview STW is a secondary treatment plant serving 2,877 people in Llanllowell, Wales. It discharges 640.52 m³/day of treated wastewater near the coast.
Creigiau Sewage Treatment Works (STW) serves the Creigiau area of Cardiff, Wales, treating wastewater for approximately 2,500 residents with secondary treatment before discharge.
DROPE STW Westbury Homes Glamorgan STW is a secondary treatment plant in Cardiff, Wales, serving approximately 2,011 people. It discharges treated wastewater near the coast, operating under UK regulations.
RHYDLAFAR ST STW is a secondary wastewater treatment plant serving 2,840 people in Cardiff, Wales, United Kingdom. It discharges 632.28 cubic meters of treated effluent daily.
ST ASAPH STW in St Asaph, Wales, is an advanced treatment plant serving 4,239 people. It discharges 943.75 m³/day of treated wastewater, with a designed capacity of 4,536 m³/day, located within 10 km of the coast.
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, ST ASAPH STW ST ASAPH STW has the highest designed capacity at 4,536 m3/day.