Cirencester Glos STW - Wastewater Treatment Plant in Cotswold, Gloucestershire

Cirencester Glos STW is a wastewater treatment plant located in the Cotswold district of Gloucestershire, England. It serves a population of around 29,600 people, placing it in the medium agglomeration category under UK regulations. The plant is situated near the village of South Cerney, with its address on Ewen Road. As a UK wastewater facility, the plant operates under the Water Industry Act 1991 and is regulated by the Environment Agency. For agglomerations of this size, secondary treatment is typically required, with tertiary treatment applied where the receiving water body is sensitive. The plant's treatment process and capacity details are not publicly available, but it is expected to meet the standards set by the Urban Waste Water Treatment Regulations 1994, which transpose the EU Urban Waste Water Treatment Directive. The treated effluent from the plant is discharged into local watercourses that ultimately drain into the River Thames catchment. The Cotswold area is known for its limestone geology and groundwater-fed rivers, which support diverse aquatic life. The plant plays a key role in protecting the water quality of the Thames basin and downstream ecosystems, including the Thames Estuary.

The plant discharges into local streams that feed into the River Thames, which flows through southern England to the North Sea. The Cotswold region is characterized by limestone aquifers and chalk streams, which are ecologically sensitive and support species such as brown trout and water crowfoot. The plant's operations help maintain water quality in this important river basin, which provides drinking water and habitat for diverse wildlife.