1,887 plants indexed. Showing 1,857 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.
REIGATE STW serves Reigate and Banstead, England, treating wastewater for approximately 55,800 people. The plant operates under UK regulations and discharges into local watercourses.
READING STW serves 201,000 people in Reading, England. The plant operates under the UK's implementation of the EU Urban Waste Water Treatment Directive, ensuring regulatory compliance for large agglomerations.
Princes Risborough Summerleys STW serves approximately 12,400 people in Buckinghamshire, England. The plant discharges treated wastewater into the local river system, contributing to the Thames basin.
PANGBOURNE STW serves the village of Pangbourne in West Berkshire, England, treating wastewater for approximately 11,400 residents. The plant operates under the UK's regulatory framework for wastewater treatment.
North Weald Essex STW serves the Epping Forest area of England, treating wastewater for approximately 5,310 people. The plant operates under the UK's implementation of the EU Urban Waste Water Treatment Directive.
NEWBURY STW in Greenham, England serves 75,600 people. The plant operates under the EU Urban Waste Water Treatment Directive, which mandates secondary treatment for agglomerations of this scale.
NAGS HEAD LANE BRENTWOOD STW serves approximately 31,000 people in Greater London, England. The plant discharges treated wastewater into the local water environment under UK regulations.
Moreton-in-Marsh STW serves the Cotswold area of Gloucestershire, England, treating wastewater for approximately 5,080 people under the UK's regulatory framework.
London Mogden STW serves 1.96 million people in Greater London, England. It discharges treated wastewater into the River Thames, which flows through London to the North Sea.
Mill Green Hatfield Herts STW serves Welwyn Hatfield, England, treating wastewater for approximately 20,200 people. The plant operates under UK regulations aligned with the EU Urban Waste Water Treatment Directive.
MERSTHAM STW serves Reigate and Banstead, England, treating wastewater for approximately 8,330 people. The plant operates under UK regulations, discharging into local watercourses.
MARLBOROUGH MARLBOROUGH WILTS STW serves approximately 10,200 people in Marlborough, Wiltshire, England. The plant discharges treated wastewater into the local water environment under UK regulations.
MARKYATE MARKYATE HERTS STW serves the Dacorum area in Hertfordshire, England, treating wastewater for approximately 5,800 people. The plant discharges into local watercourses within the Thames River basin.
Maple Lodge Bucks STW serves approximately 499,000 people in Greater London, England. The plant operates under the UK's regulatory framework for wastewater treatment.
STRATFIELD MORTIMER STW serves 5,360 people in Stratfield Mortimer, England. The plant discharges treated wastewater into local watercourses within the Thames River basin.
Maidenhead Braywick Road Maid STW serves 82,200 people in Maidenhead, England. The plant operates under the UK's Urban Waste Water Treatment Regulations, which implement the EU Urban Waste Water Treatment Directive.
LUTON STW serves approximately 158,000 people in East Hyde, England. The plant operates under the UK's implementation of the EU Urban Waste Water Treatment Directive, ensuring regulatory compliance for large agglomerations.
London Long Reach STW in Dartford, England serves approximately 858,000 people. The plant operates under the UK's implementation of the EU Urban Waste Water Treatment Directive.
Little Marlow STW serves Buckinghamshire, England, treating wastewater for approximately 164,000 people. The plant operates under UK regulations aligned with the EU Urban Waste Water Treatment Directive.
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.
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 Thames Water. UtilityRadar's records show 2 plants linked to this operator.
Among the indexed plants, REIGATE STW has the highest designed capacity at 1 m3/day.