MILLBROOK STW - Secondary Wastewater Treatment Plant in Millbrook, Cornwall

MILLBROOK STW is a municipal wastewater treatment plant located in Millbrook, Cornwall, England, serving a population of approximately 3,619. The plant is situated near the coast in the South West of England, an area known for its scenic estuaries and maritime environment. The plant provides secondary treatment, which is the standard required under the EU Urban Waste Water Treatment Directive (91/271/EEC) for agglomerations of this size. The designed capacity of 3,619 m³/day matches the population served, indicating a balanced infrastructure. The plant discharges an average of 805.72 m³/day of treated effluent. The treated effluent from MILLBROOK STW ultimately flows into the English Channel via local watercourses. The coastal discharge point is within 10 km of the shoreline, making the plant's performance important for protecting local marine water quality and the sensitive ecosystems of the Cornwall coast.

MILLBROOK STW discharges treated wastewater into local streams that drain into the English Channel near Plymouth Sound. This coastal area supports diverse marine life, including seagrass beds and fish nurseries. The plant's secondary treatment helps reduce organic load and nutrients, mitigating eutrophication risks in the sensitive coastal waters of South West England.