1,887 plants indexed.
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.
Banchory STW serves approximately 8,500 people in Banchory, Aberdeenshire, Scotland. The plant discharges treated wastewater into the River Dee, a key salmon river in the region.
WICK WWTW in Papigoe, Scotland serves approximately 8,600 people. The plant operates under the EU Urban Waste Water Treatment Directive, which mandates secondary treatment for agglomerations of this scale.
Whitburn WWTW is a wastewater treatment plant serving approximately 12,568 people in Whitburn, West Lothian, Scotland. It operates under the UK's regulatory framework for wastewater treatment.
Valleyfield WWTW serves High Valleyfield, Fife, Scotland, treating wastewater for approximately 8,666 people. The plant is located within 50 km of the coast and discharges into the local water environment.
UNDERWOOD STW serves Auchinleck, Scotland, treating wastewater for approximately 21,393 people. The plant operates under UK regulations aligned with the EU Urban Waste Water Treatment Directive.
Turriff WWTP serves approximately 7,594 people in Turriff, Aberdeenshire, Scotland. The plant discharges treated wastewater into the local water environment under Scottish regulatory oversight.
Troqueer STW is a wastewater treatment plant serving approximately 44,000 people in Dumfries, Scotland. It operates under UK regulations and discharges into the River Nith catchment.
Tillicoultry WWTW serves approximately 6,600 people in Benview, Clackmannanshire, Scotland. The plant discharges treated wastewater into the local water environment under Scottish regulatory oversight.
THURSO STW serves approximately 9,700 people in Highland, Scotland, discharging treated wastewater into the local environment. The plant operates under UK regulations aligned with the EU Urban Waste Water Treatment Directive.
TAY PFI HATTON WWTW serves East Haven, Angus, Scotland, treating wastewater for approximately 240,000 people. The plant is located within 50 km of the coast and operates under UK and EU wastewater regulations.
TAIN WWTP serves the town of Tain in the Scottish Highlands, treating wastewater for approximately 4,823 residents. The plant discharges into the Dornoch Firth, a coastal inlet of the North Sea.
SWINSTIE STW serves Bellside, North Lanarkshire, Scotland, treating wastewater for approximately 11,458 people. The plant operates under UK regulations aligned with the EU Urban Waste Water Treatment Directive.
Strathaven STW is a municipal wastewater treatment plant serving approximately 7,700 people in Strathaven, South Lanarkshire, Scotland. It operates under UK regulations implementing the EU Urban Waste Water Treatment Directive.
STRANRAER PORT RODIE STW is a closed primary treatment plant in Stranraer, Scotland, with a designed capacity of 15,000 m³/day. It is located within 10 km of the coast.
Stornoway Holm WWTP serves 12,426 people in Tolm, Scotland, discharging treated wastewater into the local coastal environment under the EU Urban Waste Water Treatment Directive.
STONEHOUSE STW is a wastewater treatment plant serving Stonehouse, South Lanarkshire, Scotland. It treats wastewater for a population of 5,289 and discharges into the local water environment.
Stirling WWTW serves over 73,000 people in Stirling, Scotland. The plant discharges treated wastewater into the River Forth, supporting the local water environment.
STEWARTON STW serves approximately 7,200 people in Stewarton, East Ayrshire, Scotland. The plant operates under the EU Urban Waste Water Treatment Directive, which mandates secondary treatment for agglomerations of this size.
STEVENSTON WWTSERVICE serves approximately 84,792 people in Stevenston, North Ayrshire, Scotland. The plant is located near the coast and operates under the EU Urban Waste Water Treatment Directive.
ST ANDREWS WWTW serves approximately 19,400 people in St Andrews, Fife, Scotland. The plant operates under UK wastewater regulations and discharges treated effluent into the local environment.
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 Scottish Water. UtilityRadar's records show 20 plants linked to this operator.
Among the indexed plants, STRANRAER PORT RODIE STW has the highest designed capacity at 15,000 m3/day.