Peso da Regua Wastewater Treatment Plant - Peso da Régua, Portugal

The Peso da Regua wastewater treatment plant is located in the municipality of Peso da Régua, in the Vila Real district of northern Portugal. The plant serves a population of approximately 17,600 residents, placing it in the medium-agglomeration category under EU classification. Its address is Estrada Caldas do Moledo, Outeiro, Caldas de Moledo, Peso da Régua e Godim. As a Portuguese wastewater facility, the plant is subject to the EU Urban Waste Water Treatment Directive (91/271/EEC), which requires secondary treatment for agglomerations with a population equivalent (PE) between 10,000 and 150,000. The directive also mandates more advanced treatment if the receiving waters are designated as sensitive areas. The plant's specific treatment process and capacity details are not publicly available, but the regulatory framework ensures compliance with European standards for effluent quality. The plant discharges treated wastewater into the local watershed, which ultimately drains into the Douro River, one of the major rivers of the Iberian Peninsula. The Douro River flows westward through Portugal and empties into the Atlantic Ocean near Porto. The river supports diverse aquatic life and is an important ecological corridor in the region. The treatment plant plays a key role in protecting the water quality of the Douro basin from urban pollution.

The Peso da Regua plant discharges into the Douro River basin, which flows through northern Portugal and Spain before reaching the Atlantic Ocean. The Douro River is a vital water resource for agriculture, biodiversity, and tourism in the region. The plant's operations help maintain water quality in the river, which supports fish populations and migratory species. The downstream environment includes the Douro Valley, a UNESCO World Heritage site known for its wine production and natural landscapes.