Windmill Hill Herstmonceux STW - Secondary Wastewater Treatment in Wealden, East Sussex

Windmill Hill Herstmonceux STW is a wastewater treatment plant located in Wealden, East Sussex, England. It serves a population of 2,319 and operates under secondary treatment, which is the standard biological treatment required for municipal wastewater in the United Kingdom. The plant's designed capacity is 2,319 population equivalents, and it discharges a daily volume of 516.29 cubic meters. As a secondary treatment facility, the plant removes organic matter and suspended solids through biological processes, meeting the requirements of the UK's Urban Waste Water Treatment Regulations, which transpose the EU Urban Waste Water Treatment Directive (91/271/EEC). For a small agglomeration of this size, secondary treatment is appropriate, and the plant is likely subject to discharge permits issued by the Environment Agency. The plant's discharge enters local watercourses that flow into the English Channel, a sensitive marine environment. The proximity to the coast (within 10 km) means that treated effluent can influence coastal water quality, particularly in the Pevensey Bay area. The plant plays a role in protecting the ecological health of the nearby wetlands and marine habitats.

The plant discharges into local streams that drain into the English Channel near Pevensey Bay. This coastal area supports diverse marine life and is part of a region with important bird habitats and salt marshes. The secondary treatment reduces organic pollutants, but nutrient removal may be limited, potentially contributing to eutrophication in the sensitive coastal ecosystem.