DUFFIELD STW Wastewater Treatment Plant, Amber Valley, Derbyshire

DUFFIELD STW is a wastewater treatment plant located in Duffield, Amber Valley, Derbyshire, in the East Midlands of England. It serves a population of around 8,300 residents, placing it in the small-to-medium agglomeration category under UK regulations. As a UK plant, DUFFIELD STW 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 additional nutrient removal if discharging into sensitive areas. It is expected to meet the standards set by the Urban Waste Water Treatment Regulations. The plant's treated effluent is discharged into a local watercourse, likely a tributary of the River Derwent, which flows through the Derbyshire countryside and eventually joins the River Trent. The River Trent drains into the Humber Estuary, a major ecological feature supporting diverse aquatic life and migratory bird populations.

DUFFIELD STW discharges into the River Derwent catchment, which flows into the River Trent and ultimately the Humber Estuary. The Humber Estuary is a large, ecologically important ecosystem that supports diverse fish, bird, and invertebrate communities. The plant's location inland, away from the coast, reduces direct marine impact, but its discharge contributes to the overall nutrient load in the river system, which can affect downstream water quality and aquatic habitats.