CUCKFIELD STW - Secondary Wastewater Treatment Plant in Mid Sussex, England

CUCKFIELD STW is a wastewater treatment facility located near Cuckfield Bypass in Mid Sussex, West Sussex, England. The plant serves a population of around 3,312, placing it in the small agglomeration category under UK and EU regulatory frameworks. It operates under the UK's implementation of the EU Urban Waste Water Treatment Directive (91/271/EEC), which requires secondary treatment for inland discharges from agglomerations of this size. The plant provides secondary treatment, which typically involves biological processes to reduce organic matter and suspended solids. Its designed capacity is 3,312 population equivalents, and the actual discharge volume is 737.37 cubic meters per day. The plant is situated inland, more than 10 km from the coast, and its treated effluent is discharged into local watercourses that ultimately drain into the English Channel. As a small inland plant, CUCKFIELD STW plays a role in protecting the water quality of local streams and rivers in the Sussex region. The receiving water body contributes to the broader drainage network that flows through the South Downs and into the English Channel, supporting diverse aquatic habitats and recreational uses downstream.

The treated effluent from CUCKFIELD STW enters local watercourses in the Sussex Ouse catchment, which flows southward through the South Downs National Park and eventually discharges into the English Channel near Newhaven. This coastal zone supports important estuarine and marine ecosystems, including nursery habitats for fish and migratory bird populations. The plant's secondary treatment helps reduce nutrient loading and organic pollution, contributing to the ecological health of the downstream environment.