LANNER ST DAY STW - Frogpool, Cornwall Wastewater Treatment Plant

LANNER ST DAY STW is a wastewater treatment plant serving the community of Frogpool in Cornwall, England. Located at United Downs Industrial Park, the facility handles wastewater from a population equivalent of about 5,066, placing it in the small-to-medium agglomeration category under UK regulatory frameworks. As a plant in the United Kingdom, LANNER ST DAY STW operates under the Urban Waste Water Treatment (England and Wales) Regulations, which transpose the EU Urban Waste Water Treatment Directive. The plant has a designed capacity of 1.00 (likely in megaliters per day or similar unit), indicating a modest scale. The plant discharges treated effluent into the local water environment, ultimately draining into the English Channel via the Fal River or nearby coastal waters. Cornwall's rivers and estuaries support diverse aquatic life, including salmon and sea trout, and the region's coastal waters are ecologically sensitive. Proper treatment helps protect these habitats from nutrient pollution and other contaminants.

The plant's discharge likely enters a tributary of the Fal River, which flows into Carrick Roads and then the English Channel. This estuarine and coastal environment supports diverse marine life, including seagrass beds and important fish nursery areas. Nutrient loading from wastewater can contribute to eutrophication, so effective treatment is crucial for maintaining water quality in this ecologically sensitive region.