BLOCKLEY STW - Secondary Wastewater Treatment in Cotswold, England

BLOCKLEY STW is a wastewater treatment plant located in the Cotswold district of Gloucestershire, England, serving the village of Blockley and surrounding areas. With a population equivalent of 2,230, it is classified as a small agglomeration under UK regulations. The plant operates under secondary treatment, which is the standard required by the EU Urban Waste Water Treatment Directive (91/271/EEC) for inland freshwater discharges. The plant has a designed capacity of 2,400 cubic meters per day and currently treats an average daily flow of approximately 496 cubic meters, indicating significant spare capacity. As a secondary treatment facility, it employs biological processes to reduce organic matter and suspended solids before discharge. The plant is part of the UK's wastewater infrastructure managed by water utilities, with regulatory oversight from the Environment Agency. The treated effluent from BLOCKLEY STW is discharged into local streams that feed into the River Thames catchment. The Cotswold region is known for its groundwater-fed rivers and ecologically sensitive chalk streams, which support diverse aquatic life. The plant's discharge contributes to maintaining water quality in this important river basin, which ultimately drains into the North Sea via the Thames Estuary.

BLOCKLEY STW discharges into local watercourses within the River Thames basin, which flows through southern England to the North Sea. The Cotswold area features groundwater-fed streams that are ecologically sensitive, supporting species such as brown trout and aquatic invertebrates. The plant's secondary treatment helps protect downstream water quality in the Thames, a major river that provides drinking water and supports diverse habitats, including estuarine and coastal ecosystems.