Long Marston STW - Secondary Wastewater Treatment in Stratford-on-Avon, England

Long Marston STW is a wastewater treatment plant located in Stratford-on-Avon, Warwickshire, England. It serves a population of 2,361 and operates under the regulatory framework of the United Kingdom, which implements the EU Urban Waste Water Treatment Directive (91/271/EEC) for agglomerations of this scale. The plant provides secondary treatment, a standard level for inland communities of this size. With a designed capacity of 3,000 cubic meters per day and an average discharge volume of 525.64 cubic meters per day, the facility operates well within its capacity. The treatment process ensures compliance with UK environmental standards for effluent quality. The treated wastewater is discharged into local watercourses that ultimately drain into the River Avon, a tributary of the River Severn. This river system supports diverse aquatic life and flows through the Cotswolds Area of Outstanding Natural Beauty before reaching the Severn Estuary. The plant plays a key role in protecting water quality in this ecologically sensitive region.

The plant discharges into local streams that feed the River Avon, which flows into the River Severn and eventually the Severn Estuary. This watershed supports diverse aquatic habitats, including fish spawning grounds and migratory corridors for species such as Atlantic salmon and eels. The region's rural and agricultural landscape requires careful management of nutrient loads to prevent eutrophication in downstream waters.