1,887 plants indexed. Showing 255 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.
North Down and Ards wastewater treatment plant serves Groomsport, Northern Ireland, treating wastewater for approximately 71,433 people. The facility operates under UK regulations and discharges into the Irish Sea.
North Coast wastewater treatment plant serves Portstewart, Northern Ireland, UK, with a population equivalent of 76,357. The facility is located near the coast and operates under UK and EU regulatory frameworks.
Warrenpoint wastewater treatment plant serves the town of Warrenpoint in Northern Ireland, United Kingdom. It is located near the coast and treats wastewater for a population of approximately 14,707.
Ballyrickard wastewater treatment plant serves Newtownards, Northern Ireland, UK. It treats wastewater for approximately 29,883 people under the EU Urban Waste Water Treatment Directive.
Whitehouse Newtownabbey wastewater treatment plant serves approximately 88,000 people in Newtownabbey, Northern Ireland. It is located near the coast and operates under UK and EU wastewater regulations.
Newry wastewater treatment plant serves approximately 58,000 people in Newry, Northern Ireland. It operates under the EU Urban Waste Water Treatment Directive, which mandates secondary treatment for agglomerations of this scale.
Newcastle wastewater treatment plant serves 16,263 people in Newcastle, Northern Ireland. Located on the coast, it operates under UK regulations and discharges into the Irish Sea.
Culmore wastewater treatment plant serves approximately 133,823 people in Culmore, Northern Ireland. It operates under UK regulations implementing the EU Urban Waste Water Treatment Directive.
Limavady wastewater treatment plant serves approximately 16,194 people in County Londonderry, Northern Ireland. It is located near the coast and operates under UK and EU wastewater regulations.
Larne wastewater treatment plant serves the town of Larne in Northern Ireland, United Kingdom. It treats wastewater from a population of approximately 28,116 and discharges into the Irish Sea.
Killyleagh wastewater treatment plant serves approximately 8,000 people in County Down, Northern Ireland. The facility discharges treated effluent into the Irish Sea via local watercourses.
Kilkeel wastewater treatment plant serves approximately 10,587 people in Kilkeel, Northern Ireland. The facility operates under UK regulations and discharges into local waterways near the Irish Sea coast.
Downpatrick wastewater treatment plant serves approximately 17,372 people in Downpatrick, Northern Ireland. The facility operates under UK and EU wastewater regulations, discharging treated effluent into local watercourses.
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.
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.
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.
LOCH RYAN WWTW serves approximately 12,600 people in Alba / Scotland, United Kingdom. The plant discharges treated wastewater into the Loch Ryan coastal environment.
ALNESS and INVERGORDON WWTW serves 5,575 people in Invergordon, Scotland. The plant discharges treated wastewater into the Cromarty Firth, a coastal inlet of the North Sea.
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 18 plants linked to this operator.
Among the indexed plants, North Down and Ards has the highest designed capacity at 1 m3/day.