Ringmer STW - Wastewater Treatment Plant in Ringmer, Lewes, East Sussex

Ringmer STW is a wastewater treatment plant located in Ringmer, a village in the Lewes district of East Sussex, England. The facility serves a population of around 5,111 people, classifying it as a small agglomeration under UK and EU regulatory frameworks. As a plant in England, Ringmer STW operates under the UK's implementation of the EU Urban Waste Water Treatment Directive (UWWTD), which requires secondary treatment for inland discharges from agglomerations of this size. Treatment processes and operational details are managed by the local water authority. The treated effluent from Ringmer STW is discharged into a local watercourse, which ultimately drains into the English Channel via the River Ouse or nearby coastal waters. The receiving environment supports diverse aquatic life and is part of the South Downs National Park area, an ecologically sensitive region.

The plant's discharge enters a local stream that flows into the River Ouse, which meanders through the Sussex countryside before reaching the English Channel at Newhaven. The downstream environment includes estuarine and coastal habitats that support migratory fish, waterfowl, and marine species. The area is ecologically sensitive due to its proximity to the South Downs, a chalk landscape with groundwater-dependent ecosystems.