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.
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.
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.
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.
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 3 plants linked to this operator.
Among the indexed plants, SHAMLEY GREEN STW has the highest designed capacity at 1 m3/day.