HUYTON STW Wastewater Treatment Plant, Liverpool, England

HUYTON STW is a wastewater treatment plant located in the Netherley area of Liverpool, England, within the Liverpool City Region. It serves a population of around 91,337, classifying it as a medium-to-large agglomeration under UK and EU standards. As a plant of this scale, it is expected to provide at least secondary treatment in line with the Urban Waste Water Treatment Directive (91/271/EEC), which the UK transposed into national law. The plant's designed capacity is 1. The plant is situated within 50 km of the coast, and its treated effluent likely discharges into the River Mersey or its tributaries, which flow into the Irish Sea. This makes the plant important for protecting the water quality of the Mersey Estuary and the downstream marine environment, which supports diverse aquatic life and commercial fisheries.

HUYTON STW discharges into the River Mersey catchment, which flows through the Mersey Estuary and into the Irish Sea. The estuary is ecologically sensitive, supporting migratory fish like salmon and sea trout, as well as important bird populations. The plant's treatment performance is critical to maintaining water quality in this dynamic estuarine system.