DELABOLE STW - Secondary Wastewater Treatment in Delabole, Cornwall

DELABOLE STW is a municipal wastewater treatment facility located on Vell Lane in Higher Pengelly, Delabole, Cornwall, England. The plant serves a population of around 1,969 and operates as part of the region's wastewater infrastructure. Its location in a rural coastal area places it within 10 km of the coastline, making discharge management critical for local water quality. The plant provides secondary treatment, a standard level required under the EU Urban Waste Water Treatment Directive (91/271/EEC) for agglomerations of this size. The directive mandates secondary treatment for populations between 2,000 and 10,000 in inland areas, though coastal discharges may require additional considerations. The plant's designed capacity is 2,251 cubic meters per day, with an average daily discharge volume of 438 cubic meters, indicating operational capacity well below design limits. The treated effluent from DELABOLE STW ultimately reaches the Atlantic Ocean via local watercourses. The plant's proximity to the coast means its discharge can affect nearshore marine environments, including bathing waters and habitats for species such as seabirds and marine life. Effective treatment helps protect the ecological health of Cornwall's coastal waters, which are important for tourism and biodiversity.

DELABOLE STW discharges into the local catchment that drains to the Atlantic Ocean along the north Cornwall coast. The area features rugged cliffs, sandy beaches, and estuaries that support diverse marine life, including seals, seabirds, and fish. The plant's coastal location means its effluent can influence water quality in nearby bathing areas and sensitive intertidal zones, making consistent secondary treatment essential for maintaining ecological balance and recreational water standards.