Overview
Avis wastewater treatment plant serves 3,200 people in Avis, Portalegre, Portugal. It provides secondary treatment and discharges 533.54 m³/day, operating under EU Urban Waste Water Treatment Directive standards.
The Avis wastewater treatment plant is located in the town of Avis, in the Portalegre district of Portugal. It serves a population of approximately 3,200 residents, making it a small agglomeration under EU classification. The plant is situated inland, away from coastal areas, and its operations are part of the municipal wastewater infrastructure for the region. The plant provides secondary treatment, which is the standard required by the EU Urban Waste Water Treatment Directive (91/271/EEC) for freshwater discharges from agglomerations of this size. The designed capacity is 5,598 m³/day, with an average discharge volume of 533.54 m³/day, indicating ample capacity for current loads. Secondary treatment typically involves biological processes to reduce organic matter and suspended solids. The treated effluent is discharged into a local watercourse, which ultimately drains into the Tagus River basin, one of the major river systems in the Iberian Peninsula. The Tagus River flows westward through Portugal and empties into the Atlantic Ocean near Lisbon. The plant's operations help protect the local watershed and downstream aquatic ecosystems from untreated wastewater pollution.
Environmental context
The plant discharges into a tributary of the Tagus River basin, which flows through central Portugal and into the Atlantic Ocean. The Tagus estuary is an ecologically important area supporting diverse bird species and fish populations. The secondary treatment provided by the plant reduces organic pollutants and suspended solids, helping to maintain water quality in the river system and protect downstream habitats.
Frequently asked questions
The Avis wastewater treatment plant is located at ER 243, in the town of Avis, Portalegre district, Portugal, with coordinates 39.047 N, 7.863 W.
The plant serves approximately 3,200 residents, classifying it as a small agglomeration under EU wastewater treatment directives.
The plant discharges treated effluent into a local watercourse that is part of the Tagus River basin, which flows to the Atlantic Ocean.
The plant provides secondary treatment, which is the standard required by the EU Urban Waste Water Treatment Directive for freshwater discharges from agglomerations of this size.
The plant operates under the EU Urban Waste Water Treatment Directive (91/271/EEC), transposed into Portuguese law, which mandates secondary treatment for agglomerations with a population equivalent above 2,000 discharging to freshwater.
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