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.
Lightwater STW serves approximately 19,100 people in Surrey Heath, England. The plant operates under the UK's wastewater regulatory framework, discharging treated effluent into local watercourses.
LEATHERHEAD STW serves approximately 46,200 people in Mole Valley, Surrey, England. The plant discharges treated wastewater into local watercourses within the Thames River basin.
IVER IVER BUCKS STW is a wastewater treatment plant serving approximately 7,600 people in Thorney, Buckinghamshire, England. It operates under the UK's regulatory framework for wastewater treatment.
Hungerford Berks STW serves approximately 6,100 people in Hungerford, England. The plant operates under the UK's wastewater regulatory framework, treating sewage from the local community.
Horley STW serves the Reigate and Banstead area of Surrey, England, treating wastewater for approximately 35,600 people. The plant operates under the UK's regulatory framework for wastewater treatment.
HOLMWOOD STW serves Mole Valley, England, treating wastewater for approximately 5,720 people. The plant operates under UK regulations and discharges into the local water environment.
London Hogsmill Valley STW is a major wastewater treatment plant in Greater London, UK, serving approximately 391,000 people. It operates under the UK's regulatory framework derived from the EU Urban Waste Water Treatment Directive.
Pirbright Hockford STW serves Woking, England, treating wastewater for approximately 16,400 people. The plant discharges into the local river system within the Thames Basin.
Highworth Pentylands Lane Hig STW serves the town of Highworth, England, with a population equivalent of 9,210. The plant discharges treated wastewater into local watercourses within the Thames River basin.
High Wycombe BU STW is a closed secondary treatment plant in Buckinghamshire, England, with a designed capacity of 64,136 m³/day. It served the High Wycombe area before decommissioning.
Henley STW serves the Henley-on-Thames area in South Oxfordshire, England, treating wastewater from approximately 11,300 residents. The plant operates under the UK's regulatory framework for wastewater treatment.
Haslemere STW serves approximately 14,000 people in Waverley, England. The plant operates under UK wastewater regulations, discharging treated effluent into local watercourses.
Hartley Wintney STW serves 20,700 people in Hart, Hampshire, England. The plant operates under the UK's wastewater regulatory framework, discharging treated effluent into local watercourses.
Harpenden Herts STW serves 36,100 people in St Albans, Hertfordshire, England. The plant discharges treated wastewater into the local water environment under UK regulations.
HADDENHAM STW AYLESBURY is a wastewater treatment plant serving approximately 4,620 people in Haddenham, Buckinghamshire, England. It operates under the UK's regulatory framework for small agglomerations.
Guildford Surrey STW serves approximately 87,800 people in Guildford, England. The plant operates under the UK's implementation of the EU Urban Waste Water Treatment Directive.
Goring Goring Oxon STW serves the village of Goring-on-Thames in South Oxfordshire, England, treating wastewater for approximately 7,280 residents. The plant discharges into the River Thames, a major watercourse in southern England.
GODALMING UNSTEAD GODALMING STW is a wastewater treatment plant serving approximately 31,000 people in Guildford, Surrey, England. It operates under the UK's regulatory framework for wastewater treatment.
Gerrards Cross STW in Denham, Buckinghamshire serves approximately 8,100 people. The plant operates under the UK's wastewater regulatory framework, discharging treated effluent into local watercourses.
Fyfield STW is a closed secondary treatment plant in Fyfield, Wiltshire, England, with a designed capacity of 2,320 m³/day. It served the local community under UK wastewater 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 Anglian Water. UtilityRadar's records show 1 plant linked to this operator.
Among the indexed plants, HIGH WYCOMBE HIGH WYCOMBE BU STW has the highest designed capacity at 64,136 m3/day.