WRENBURY STW - Secondary Wastewater Treatment Plant in Aston, England

WRENBURY STW is a wastewater treatment works located near Aston in Cheshire East, England, serving a population of around 3,060. The facility provides secondary treatment, a standard level for small agglomerations in the United Kingdom. The plant discharges an average of 681.26 cubic meters of treated effluent per day, with a designed capacity of 3,445 cubic meters per day, indicating operational headroom. As a UK wastewater facility, it operates under the Water Industry Act 1991 and is regulated by the Environment Agency, which sets discharge permits to protect water quality. The plant's treated effluent likely enters a local watercourse within the River Weaver catchment, which flows into the River Mersey estuary and eventually the Irish Sea. This contributes to the ecological health of the region's freshwater and coastal environments.

The plant discharges into a local watercourse within the River Weaver basin, which drains into the River Mersey estuary and then the Irish Sea. The surrounding area includes agricultural land and small settlements, so the plant helps protect downstream water quality from nutrient and pathogen pollution. The Mersey estuary supports diverse birdlife and fish populations, making effective wastewater treatment important for maintaining ecological balance.