San Rosendo Wastewater Treatment Plant, Tuxtepec, Oaxaca, Mexico

San Rosendo is a wastewater treatment plant located in Tuxtepec, Oaxaca, Mexico, serving a population of approximately 103,750 people. The facility is situated in the Papaloapan River basin, an important hydrological region in southern Mexico. As a medium-to-large agglomeration, the plant plays a key role in managing municipal wastewater for the urban area of Tuxtepec. The plant has a designed capacity of 1. In Mexico, wastewater treatment plants of this scale are typically regulated under the National Water Law (Ley de Aguas Nacionales) and must comply with official standards (NOM-001-SEMARNAT-1996) for discharge quality. The plant likely employs conventional treatment processes appropriate for its population served. Treated effluent from San Rosendo is discharged into the Papaloapan River, which flows into the Gulf of Mexico near Alvarado, Veracruz. The river supports diverse aquatic life and is used for irrigation and fishing downstream. The plant's operation helps protect water quality in the Papaloapan basin and the coastal ecosystems of the Gulf of Mexico.

San Rosendo discharges treated wastewater into the Papaloapan River, a major river in Oaxaca that drains into the Gulf of Mexico. The Papaloapan basin is ecologically significant, supporting diverse freshwater and estuarine habitats, including wetlands and mangrove forests near the coast. The river is a vital resource for local communities, agriculture, and fisheries, making effective wastewater treatment essential for maintaining water quality and ecosystem health.