1,887 plants indexed. Showing 161 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.
Penrhyndeudraeth STW is a secondary treatment plant serving 2,198 people in Gwynedd, Wales. It discharges 489.35 m³/day of treated wastewater near the coast of Cardigan Bay.
MOSTYN STW is a secondary wastewater treatment plant in Mostyn, Wales, serving approximately 4,293 people. It discharges 955.77 m³/day of treated effluent into the Dee Estuary, a coastal environment.
LLANFAES STW is a secondary treatment plant serving 2,199 people in Llanfaes, Wales. It discharges treated wastewater near the Menai Strait, a coastal inlet of the Irish Sea.
Dyffryn Ardudwy STW is a secondary wastewater treatment plant serving approximately 3,300 people in Llanenddwyn, Gwynedd, Wales. It discharges treated effluent into the local coastal environment.
DYSERTH STW STW is a secondary wastewater treatment plant in St Asaph, Wales, serving 2,477 people. It discharges 551.47 m³/day and is located within 10 km of the coast.
TREGARTH STW is a secondary treatment plant serving Bethesda, Wales. It discharges treated wastewater near the coast, with a population equivalent of 2,554 and a design capacity matching that figure.
LLANBERIS STW is an advanced wastewater treatment plant in Llanberis, Gwynedd, Wales, serving approximately 2,107 people. It discharges treated effluent near the coast, supporting local water quality in the region.
LLANLLYFNI C STW is a secondary wastewater treatment plant in Clynnog, Gwynedd, Wales, serving approximately 4,068 people. It discharges treated effluent into the local catchment, which ultimately drains into the Irish Sea.
B_AU FES STW STW is a secondary wastewater treatment plant in Blaenau Ffestiniog, Wales, serving approximately 4,035 people. It discharges treated effluent into the local catchment, ultimately draining to Cardigan Bay.
MACHYNLLETH STW STW is a secondary treatment plant in Gwynedd, Wales, serving approximately 2,916 people. It discharges 649.20 cubic meters of treated wastewater daily and is located within 10 km of the coast.
DOLGELLAU ST STW is a secondary treatment plant serving Llanelltyd, Gwynedd, Wales. It treats wastewater for a population of 3,918 and discharges a daily volume of 872.28 cubic meters.
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.
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, LLANFAES STW has the highest designed capacity at 10,613 m3/day.