Pereira do Campo I Wastewater Treatment Plant, Pereira, Portugal

Pereira do Campo I is a municipal wastewater treatment plant located in Pereira, a parish in the Montemor-o-Velho municipality, Coimbra district, Portugal. The plant serves a population of approximately 1,250 people, classifying it as a small agglomeration under Portuguese and EU regulations. The plant provides secondary treatment, which is the standard required by the EU Urban Waste Water Treatment Directive (91/271/EEC) for discharges into freshwater and estuaries from agglomerations of this size. Its designed capacity is 2,832 cubic meters per day, with an average daily discharge of 208.41 cubic meters, indicating significant spare capacity. The treated effluent is discharged into the local watershed, which ultimately drains into the Mondego River, one of the major rivers in central Portugal. The Mondego River flows westward through Coimbra and into the Atlantic Ocean near Figueira da Foz, supporting diverse aquatic ecosystems and agricultural water use along its course.

The plant discharges into the Mondego River basin, which flows through the Coimbra region and empties into the Atlantic Ocean. The Mondego River supports a variety of freshwater species and provides water for irrigation and industry. Downstream, the estuary near Figueira da Foz is an important ecological zone for migratory birds and marine life. The plant's secondary treatment helps protect water quality in this sensitive riverine and coastal environment.