Paco Wastewater Treatment Plant, Peniche, Portugal

Paco wastewater treatment plant is located in Peniche, a coastal town in the Leiria district of Portugal. The plant serves a population of approximately 2,600 people, making it a small-scale municipal facility. It is situated near the Atlantic Ocean, within 10 km of the coast. The plant operates with secondary treatment, which is the standard level required under the EU Urban Waste Water Treatment Directive (91/271/EEC) for agglomerations of this size. Secondary treatment typically involves biological processes to reduce organic matter and suspended solids. The plant has a designed capacity of 3,269 cubic meters per day and reports a discharge volume of 433.5 cubic meters per day, indicating it operates well below its capacity. Treated effluent from Paco is discharged into the local environment, ultimately reaching the Atlantic Ocean. The coastal waters near Peniche support diverse marine life and are important for local fisheries and tourism. The plant's proximity to the coast underscores the importance of effective treatment to protect marine water quality and comply with EU environmental standards.

The Paco treatment plant discharges into the Atlantic Ocean via local streams and groundwater. The coastal area near Peniche is part of the Portuguese western seaboard, known for its rocky shores and marine biodiversity. The region supports important fisheries and is a popular surfing destination, making water quality crucial for both ecological and recreational uses. The plant's secondary treatment helps reduce nutrient and organic loads, mitigating the risk of eutrophication in the coastal zone.