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.
KIMBOLTON STW is a secondary treatment plant in Huntingdonshire, England, serving approximately 3,710 people. It discharges treated wastewater into local watercourses, supporting the region's water quality.
KEELBY STW is a secondary wastewater treatment plant in West Lindsey, Lincolnshire, England, serving approximately 2,097 people. It discharges treated effluent near the Humber Estuary, supporting local water quality standards.
KEDINGTON STW is a secondary wastewater treatment plant in West Suffolk, England, serving approximately 2,042 people. It discharges treated effluent into local watercourses, supporting the region's water quality management.
Ivinghoe STW is a secondary wastewater treatment plant serving approximately 3,710 people in Pitstone, Buckinghamshire, England. It discharges treated effluent into local watercourses within the Thames River basin.
ISLEHAM STW is a secondary treatment plant serving West Suffolk, England, with a population equivalent of 2,173. It discharges treated wastewater into local waterways, supporting the region's environmental health.
HORBLING STW is a secondary treatment plant in South Kesteven, England, serving approximately 2,936 people. It discharges 653.66 cubic meters of treated wastewater daily, with a designed capacity of 5,600 cubic meters.
Holton le Clay STW is a secondary treatment plant in East Lindsey, England, serving 3,440 people. It discharges 765.86 m³/day of treated wastewater and has a designed capacity of 4,950 m³/day.
HEMPNALL STW is a secondary treatment plant serving 2,349 people in South Norfolk, England. It discharges treated wastewater into local watercourses, contributing to the region's water quality management.
Heckington STW is a secondary treatment plant serving 4,131 people in North Kesteven, Lincolnshire, England. It discharges treated wastewater into the local water environment, operating under UK regulations.
HAUGHLEY STW is a secondary treatment plant serving 2,251 people in Mid Suffolk, England. It discharges 501.15 m³/day of treated wastewater into local watercourses.
HANSLOPE STW is a secondary treatment plant serving 2,175 people in Hanslope, England. It discharges 484.23 cubic meters of treated wastewater daily, with a designed capacity of 2,269 cubic meters.
HADDENHAM STW is a secondary wastewater treatment plant in Haddenham, East Cambridgeshire, England, serving approximately 2,994 people. It discharges 666.57 m³/day of treated effluent and has a designed capacity of 3,052 m³/day.
GRIMSTON STW is a secondary treatment plant serving 3,890 people in King's Lynn and West Norfolk, England. It discharges 866.05 cubic meters of treated wastewater daily.
Great Wenham STW is a secondary treatment plant serving 2,798 people in Babergh, Suffolk, England. It discharges treated wastewater near the coast, operating under UK regulations.
Great Waldingfield STW is a secondary treatment plant in Babergh, Suffolk, England, serving approximately 2,153 people. It discharges 479.33 m³/day of treated wastewater into local watercourses.
Great Totham STW is a secondary treatment plant serving 4,067 people in Maldon, Essex, England. It discharges treated wastewater near the coast, operating under UK environmental regulations.
GREAT EASTON STW is a secondary treatment plant in Uttlesford, England, serving 3,366 people. It discharges 749.39 m³/day of treated wastewater, operating under UK regulations.
Great Chesterford STW is a secondary treatment plant in South Cambridgeshire, England, serving approximately 3,577 people. It discharges treated wastewater into the local water environment.
Gosberton STW is a secondary wastewater treatment plant serving 2,490 people in South Holland, Lincolnshire, England. It discharges treated effluent into local watercourses within the Greater Lincolnshire region.
GLEMSFORD STW is a secondary wastewater treatment plant serving 3,765 people in Babergh, Suffolk, England. It discharges 838.22 m³/day of treated effluent into local watercourses.
UtilityRadar indexes 1887 wastewater treatment plants in United Kingdom, with treatment level, capacity, operator and discharge data on each record.
Among the indexed plants, HORBLING STW has the highest designed capacity at 5,600 m3/day.