1,887 plants indexed. Showing 1,379 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.
AVIEMORE STW serves approximately 5,887 people in Aviemore, Scotland. The plant discharges into the Spey Valley, part of the River Spey catchment, a key salmon river in the United Kingdom.
Auchterarder WWTP serves the Perth and Kinross area in Scotland, United Kingdom, with a designed capacity of 1.00 (units unspecified). The plant treats wastewater for a population of approximately 4,721.
ARMADALE WWTW serves the town of Armadale in West Lothian, Scotland, treating wastewater for approximately 12,674 people. The plant is located within 50 km of the coast and operates under UK and EU wastewater regulations.
ALVA WWTW is a wastewater treatment plant serving Alva, Clackmannanshire, Scotland. It serves a population of approximately 7,000 and has a designed capacity of 1.00.
ALLERS STW serves Bothwell, Scotland, treating wastewater for approximately 40,923 people. The plant operates under the EU Urban Waste Water Treatment Directive, which mandates secondary treatment for agglomerations of this scale.
PORTHMADOG STW serves the Welsh town of Porthmadog, treating wastewater for approximately 4,819 people. The plant is located near the coast in Gwynedd, Wales, within 50 km of the sea.
GRESFORD STW serves Pandy, Wales, treating wastewater for approximately 17,669 people. The plant operates under the UK's regulatory framework for wastewater treatment.
MOLD STW serves the town of Mold in Flintshire, Wales, treating wastewater for approximately 20,656 people. The plant operates under UK regulations aligned with the EU Urban Waste Water Treatment Directive.
DENBIGH STW STW serves St Asaph, Wales, treating wastewater for approximately 8,870 people. The plant operates under UK regulations and discharges into the local water environment.
Ruthin STW STW serves approximately 5,566 people in Ruthin, Denbighshire, Wales. The plant discharges treated wastewater into the local water environment under UK regulations.
Bethesda STW STW serves the community of Bethesda in Gwynedd, Wales. The plant treats wastewater for approximately 5,054 people and discharges into the local water environment.
YSTRADGYNLAIS WWTW OFF WIND ROAD STW serves Ystalyfera, Wales, treating wastewater for approximately 11,515 people. The plant operates under UK regulations and discharges into the local river system.
Trebanos STW serves approximately 16,600 people in Trebanos, Wales. The plant discharges treated wastewater into the local water environment, operating under UK water quality regulations.
MAESTEG STW is a municipal wastewater treatment plant serving Llangynwyd, Wales, UK. It treats wastewater for approximately 20,591 people and discharges into the local water environment.
Cardigan STW serves the town of Aberteifi/Cardigan in Pembrokeshire, Wales, treating wastewater for a population of approximately 5,741. The plant is located near the coast and discharges into local watercourses.
Carmarthen STW serves approximately 20,285 people in Carmarthen, Wales. The plant operates under UK wastewater regulations, discharging treated effluent into the local catchment of the River Towy.
AMMANFORD STW serves approximately 30,470 people in the Swansea area of Wales, United Kingdom. The plant operates under the EU Urban Waste Water Treatment Directive, which mandates secondary treatment for agglomerations of this size.
Llangennech Waste Water Treatment STW serves the community of Llangennech in Carmarthenshire, Wales. The plant is part of the UK's wastewater infrastructure, operating under national regulations.
Gowerton STW is a municipal wastewater treatment plant serving approximately 54,733 people in Carmarthenshire, Wales. It operates under the UK's regulatory framework for wastewater treatment.
CRYNANT STW STW serves approximately 5,193 people in Crynant, Neath Port Talbot, Wales. The plant operates under UK wastewater regulations and discharges treated effluent into the local river system.
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 Dŵr Cymru / Welsh Water. UtilityRadar's records show 15 plants linked to this operator.
Among the indexed plants, AVIEMORE STW has the highest designed capacity at 1 m3/day.