Manchester and Salford DavyhulmeSTW: Major Wastewater Treatment Plant in Trafford, England

Manchester and Salford DavyhulmeSTW is a major wastewater treatment facility located in Trafford, Greater Manchester, England. Serving a population of over 1 million, it is one of the largest treatment plants in the United Kingdom, handling wastewater from the Manchester and Salford metropolitan areas. As a large agglomeration exceeding 150,000 population equivalent, the plant operates under the EU Urban Waste Water Treatment Directive (91/271/EEC), which mandates secondary treatment as a minimum and tertiary treatment where the receiving waters are sensitive. The plant's designed capacity is 1.00 million cubic meters per day, reflecting its critical role in the region's wastewater infrastructure. The plant discharges treated effluent into the Manchester Ship Canal, which flows into the Mersey Estuary and ultimately the Irish Sea. This water body supports diverse aquatic life and is an important migratory corridor for fish species. The plant's operations are crucial for protecting the ecological health of the estuary and downstream marine environment.

The plant discharges into the Manchester Ship Canal, which connects to the Mersey Estuary and then the Irish Sea. This estuarine environment supports diverse aquatic life, including fish and bird populations, and is an important migratory corridor. The plant's large discharge volume requires careful management to prevent nutrient enrichment and protect downstream water quality.