Pombal Wastewater Treatment Plant - Serving Pombal, Portugal

The Pombal wastewater treatment plant is located in the industrial zone of Formiga, serving the municipality of Pombal in the Leiria district of central Portugal. With a population equivalent of 65,600, it falls under the EU classification of a medium-to-large agglomeration, requiring advanced treatment to protect sensitive receiving waters. As a Portuguese facility, the plant operates under the EU Urban Waste Water Treatment Directive (91/271/EEC), which mandates secondary biological treatment for agglomerations over 2,000 population equivalent. For larger agglomerations like Pombal, the directive requires more stringent treatment if the receiving water body is designated as sensitive. The plant's designed capacity is 1. 00 (likely in thousands of cubic meters per day), indicating a facility sized to handle the local load. The treated effluent is discharged into local watercourses that ultimately drain into the Atlantic Ocean via the Mondego River basin or coastal streams. The region's rivers support diverse aquatic life and are important for agriculture and tourism. Proper treatment ensures that nutrient loads and pollutants are minimized, protecting downstream ecosystems and coastal water quality.

The Pombal plant discharges into the local watershed, which flows into the Atlantic Ocean via the Mondego River or smaller coastal streams. The region's rivers support diverse aquatic life and are important for agriculture and tourism. Proper treatment ensures that nutrient loads and pollutants are minimized, protecting downstream ecosystems and coastal water quality.