PORTHTOWAN STW - Secondary Wastewater Treatment Plant in Mount Hawke, Cornwall

PORTHTOWAN STW is a municipal wastewater treatment plant located near Mount Hawke in Cornwall, England, United Kingdom. It serves a population of approximately 2,623 people and operates under the regulatory framework of the UK's water industry, which implements the EU Urban Waste Water Treatment Directive (91/271/EEC) as retained in UK law. The plant provides secondary treatment, a standard level for coastal communities of this size. The plant has a designed capacity of 2778 cubic meters per day and currently treats an average daily flow of 583.97 cubic meters. As a secondary treatment facility, it uses biological processes to reduce organic matter and suspended solids before discharge. The plant's location within 10 km of the coast means its discharge is subject to additional environmental scrutiny to protect marine waters. The treated effluent from PORTHTOWAN STW ultimately reaches the Celtic Sea via local watercourses. The surrounding area includes the Cornwall Area of Outstanding Natural Beauty, and the discharge contributes to the nutrient balance in coastal waters. The plant plays a key role in maintaining water quality in this ecologically sensitive region, which supports diverse marine life and important habitats.

PORTHTOWAN STW discharges treated wastewater into local streams that flow into the Celtic Sea near the north Cornwall coast. This coastal environment supports diverse marine ecosystems, including rocky shores and sandy beaches, and is important for migratory fish and seabirds. The plant's secondary treatment helps reduce nutrient loading, which is critical for preventing eutrophication in the sensitive coastal waters of the Celtic Sea.