1,887 plants indexed. Showing 1,405 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.
White Waltham B STW serves the village of White Waltham in Berkshire, England, treating wastewater for approximately 5,560 people. The plant discharges into local waterways within the Thames River basin.
WHEATLEY WHEATLEY OXON STW serves approximately 4,770 people in South Oxfordshire, England. The plant discharges treated effluent into local watercourses within the Thames River basin.
WEYBRIDGE SEVEN ARCHESBRIDGE STW serves Runnymede, England, treating wastewater for approximately 19,300 people. The plant operates under UK regulations implementing the EU Urban Waste Water Treatment Directive.
WASHWATER STW serves the Basingstoke and Deane area in Hampshire, England, treating wastewater for approximately 6,770 people. The plant operates under UK regulations implementing the EU Urban Waste Water Treatment Directive.
Wantage STW serves approximately 25,500 people in the Vale of White Horse, Oxfordshire, England. The plant operates under the UK's wastewater regulatory framework, treating sewage before discharge into local watercourses.
TRING TRING HERTS STW serves approximately 12,300 people in Dacorum, Hertfordshire, England. The plant discharges treated wastewater into the local water environment, supporting the River Bulbourne and the wider Thames Basin.
THAME THAME OXON STW is a wastewater treatment plant serving approximately 12,700 people in South Oxfordshire, England. It operates under the UK's regulatory framework for water quality.
Swindon Rodbourne Swindon WI STW serves 209,000 people in Swindon, England. The plant operates under UK wastewater regulations, treating municipal sewage before discharge into local watercourses.
Stansted Mountfitchet Stansted STW serves approximately 9,430 people in Uttlesford, Essex, England. The plant operates under the UK's wastewater regulatory framework, treating sewage from the local community.
Stanford Rivers Ongar Essex STW is a wastewater treatment plant in Epping Forest, England, serving a population of 7,380. It operates under the UK's implementation of the EU Urban Waste Water Treatment Directive.
SONNING COMMON STW serves 4,600 people in South Oxfordshire, England. The plant discharges into local waterways under UK environmental regulations.
Slough Wood STW serves 206,000 people in Slough, England. The plant operates under the UK's implementation of the EU Urban Waste Water Treatment Directive, ensuring compliance with secondary treatment standards for large agglomerations.
Silchester Silchester Hants STW serves approximately 18,000 people in the Basingstoke and Deane area of Hampshire, England. The plant operates under the UK's regulatory framework for wastewater treatment.
Shrivenham Swindon STW serves approximately 6,470 people in Shrivenham, Oxfordshire, England. The plant discharges treated wastewater into the local water environment under UK regulations.
Sherfield on Loddon STW serves approximately 5,440 people in Basingstoke and Deane, Hampshire, England. The plant treats wastewater from the local community before discharging into the River Loddon catchment.
Shamley Green STW is a wastewater treatment plant serving approximately 5,250 people in Waverley, Surrey, England. It operates under the UK's regulatory framework for small agglomerations.
SANDHURST SANDHURST BERKS STW serves approximately 34,800 people in Sandhurst, England. The plant operates under the UK's wastewater regulatory framework, ensuring compliance with environmental standards.
RIPLEY STW serves approximately 15,800 people in Guildford, England, discharging treated wastewater into the River Wey Navigation. The plant operates under the UK's implementation of the EU Urban Waste Water Treatment Directive.
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.
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 4 plants linked to this operator.
Among the indexed plants, STANFORD RIVERS ONGAR ESSEX STW has the highest designed capacity at 1 m3/day.