ETE Amarantes Wastewater Treatment Plant, Amarante, Piauí, Brazil

ETE Amarantes is a wastewater treatment plant located in Amarante, within the state of Piauí in northeastern Brazil. The facility serves a small population of around 947 residents, reflecting the scale of the local community. As part of Brazil's wastewater infrastructure, it contributes to sanitation and environmental protection in the region. The plant operates under Brazil's regulatory framework, which includes the National Environment Council (CONAMA) resolutions and state-level environmental permits. For small agglomerations like Amarante, treatment standards are typically aligned with the capacity to protect receiving water bodies. The plant is expected to meet basic treatment requirements to reduce organic load and pathogens before discharge. The treated effluent from ETE Amarantes is likely discharged into a local watercourse within the Parnaíba River basin, which drains into the Atlantic Ocean. The Parnaíba River is a major river in northeastern Brazil, supporting diverse aquatic ecosystems and providing water for agriculture and human consumption. The plant's operation helps maintain water quality in this ecologically important basin.

ETE Amarantes discharges into a tributary of the Parnaíba River, which flows through the semi-arid Caatinga biome before reaching the Atlantic Ocean. The Parnaíba River basin supports diverse aquatic life and is an important migratory corridor for fish species. Protecting water quality in this basin is critical for sustaining local fisheries and the ecological health of the delta region.