1,887 plants indexed. Showing 1,267 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.
Shepton Mallet STW serves approximately 52,000 people in Somerset, England. The plant operates under UK wastewater regulations, discharging treated effluent into local watercourses.
Sharpness STW is a wastewater treatment plant serving approximately 5,000 people in Stroud, Gloucestershire, England. It operates under the UK's regulatory framework for water quality.
SHAFTESBURY STW serves approximately 18,455 people in Shaftesbury, Dorset, England. The plant operates under UK wastewater regulations, treating municipal sewage before discharge into local watercourses.
Salisbury STW in Alderbury, England, serves approximately 59,105 people. The plant operates under the EU Urban Waste Water Treatment Directive, which mandates secondary treatment for agglomerations of this scale.
RINGWOOD STW serves St Ives, Dorset, England, treating wastewater for approximately 16,500 people. The plant operates under UK regulations aligned with the EU Urban Waste Water Treatment Directive.
RATFYN STW serves Amesbury, Wiltshire, England, treating wastewater for approximately 10,282 people. The plant operates under UK regulations aligned with the EU Urban Waste Water Treatment Directive.
Radstock & Midsomer Norton STW serves 21,742 people in Radstock, England. The plant operates under UK regulations implementing the EU Urban Waste Water Treatment Directive.
POTTERNE STW serves the Devizes area in Wiltshire, England, treating wastewater for approximately 11,365 people. The plant discharges into local watercourses within the Avon catchment.
Portishead & Pill STW serves 28,827 people in the City of Bristol, England. The plant discharges into the Severn Estuary, a major tidal water body with significant ecological importance.
Poole STW serves approximately 164,000 people in Poole, England. The plant operates under the UK's implementation of the EU Urban Waste Water Treatment Directive.
PEWSEY STW is a wastewater treatment plant serving approximately 7,200 people in Pewsey, Wiltshire, England. It operates under the UK's urban wastewater regulations, which mandate secondary treatment for inland agglomerations of this size.
PAULTON STW serves approximately 10,000 people in Paulton, England. The plant operates under the UK's wastewater regulatory framework, discharging treated effluent into local watercourses.
Ferndown, Verwood, West Moors, and St Ives STW serves approximately 40,798 people in Hurn, England. The plant operates under the UK's wastewater regulatory framework, discharging treated effluent into local watercourses.
MINEHEAD STW serves Dunster, Somerset, England, treating wastewater for approximately 25,945 people. The plant operates under UK regulations implementing the EU Urban Waste Water Treatment Directive.
Melksham STW serves approximately 18,700 people in Melksham, Wiltshire, England. The plant discharges treated wastewater into the local river system, contributing to the Bristol Avon catchment.
MARTOCK STW serves the Somerset town of Martock, England, treating wastewater for approximately 8,210 people. The plant discharges into local waterways within the Parrett River catchment.
MARNHULL STW is a wastewater treatment plant serving approximately 5,515 people in Marnhull, Dorset, England. It operates under the UK's regulatory framework for small agglomerations.
Malmesbury STW serves approximately 10,786 people in Milbourne, England. The plant operates under the UK's wastewater regulatory framework, discharging treated effluent into local watercourses.
Lytchett Minster STW serves approximately 8,749 people in Dorset, England. The plant operates under the UK's wastewater regulatory framework, discharging treated effluent into local watercourses.
LANGPORT STW serves Huish Episcopi, Somerset, England, treating wastewater for approximately 8,639 people. The plant operates under UK regulations implementing the EU Urban Waste Water Treatment Directive.
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 South West Water. UtilityRadar's records show 1 plant linked to this operator.
Among the indexed plants, SHEPTON MALLET STW has the highest designed capacity at 1 m3/day.