1,887 plants indexed. Showing 1,267 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.
Coalisland wastewater treatment plant serves approximately 12,095 people in County Tyrone, Northern Ireland. It operates under the EU Urban Waste Water Treatment Directive, which mandates secondary treatment for agglomerations of this scale.
Castlederg wastewater treatment plant serves the town of Castlederg in County Tyrone, Northern Ireland. It operates under UK and EU regulations for small agglomerations.
Carrickfergus wastewater treatment plant serves approximately 32,000 people in County Antrim, Northern Ireland. The facility operates under UK regulations and discharges treated effluent into the local coastal environment of Belfast Lough.
Bushmills wastewater treatment plant serves the town of Bushmills in County Antrim, Northern Ireland. It treats wastewater from a population of approximately 5,539 under UK and EU regulatory frameworks.
Belfast wastewater treatment plant serves 365,000 people in Northern Ireland, discharging treated effluent into Belfast Lough. The facility operates under UK and EU regulatory frameworks.
Ballynahinch wastewater treatment plant serves approximately 7,942 people in County Down, Northern Ireland. The facility discharges treated effluent into local waterways under UK environmental regulations.
Kinnegar wastewater treatment plant serves Holywood, Northern Ireland, treating wastewater for approximately 73,000 people. The facility is located near the coast of Belfast Lough.
Ballymoney Glenstall wastewater treatment plant serves County Londonderry, Northern Ireland, treating wastewater for approximately 21,219 people. The facility operates under UK regulations and discharges into local waterways.
Ballykelly wastewater treatment plant serves approximately 4,800 residents in County Londonderry, Northern Ireland. The facility discharges into local waterways within the Foyle catchment, supporting water quality in the region.
Ballycastle wastewater treatment plant serves Ballyvoy, Northern Ireland, treating wastewater for approximately 14,000 people. It is located within 50 km of the coast, discharging into the North Atlantic via local waterways.
Ballymena Tullaghgarley wastewater treatment plant serves County Antrim, Northern Ireland, with a population equivalent of 113,825. It operates under the EU Urban Waste Water Treatment Directive, which mandates secondary treatment for agglomerations
Tandragee wastewater treatment plant serves approximately 13,659 people in County Armagh, Northern Ireland. The facility discharges into local waterways under UK and EU regulatory frameworks.
Moygashel wastewater treatment plant serves approximately 79,000 people in County Tyrone, Northern Ireland. It operates under the EU Urban Waste Water Treatment Directive, which mandates secondary treatment for agglomerations of this scale.
Magherafelt Killyneese wastewater treatment plant serves Castledawson, Northern Ireland, with a population equivalent of 15,933. The facility operates under UK and EU regulatory frameworks for wastewater treatment.
Enniskillen wastewater treatment plant serves approximately 26,500 people in County Fermanagh, Northern Ireland. The facility discharges into the Erne River system, which flows into the Atlantic Ocean via Donegal Bay.
Cookstown wastewater treatment plant serves approximately 19,800 residents in County Tyrone, Northern Ireland. The facility discharges treated effluent into local waterways within the Neagh Bann river basin district.
Ballyclare wastewater treatment plant serves approximately 16,500 people in County Antrim, Northern Ireland. The facility operates under UK and EU regulations for municipal wastewater treatment.
Banbridge wastewater treatment plant serves the town of Banbridge, County Down, Northern Ireland. It operates under UK regulations for municipal wastewater treatment.
Armagh wastewater treatment plant serves approximately 20,867 people in Armagh, Northern Ireland. The facility operates under UK regulations implementing the EU Urban Waste Water Treatment Directive.
Antrim Milltown wastewater treatment plant serves approximately 66,254 people in Antrim, Northern Ireland. It operates under the EU Urban Waste Water Treatment Directive, which mandates secondary treatment for agglomerations of this scale.
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 NI Water. UtilityRadar's records show 20 plants linked to this operator.
Among the indexed plants, Castlederg has the highest designed capacity at 1 m3/day.