San Francisco Tutla Wastewater Treatment Plant, Oaxaca, Mexico

San Francisco Tutla is a municipal wastewater treatment plant located in the town of San Francisco Tutla, within the municipality of Santa Lucía del Camino in Oaxaca, Mexico. The plant serves a population of approximately 2,738 residents, providing secondary treatment to manage domestic wastewater from the community. The plant has a designed capacity of 259.20 m³/day and currently discharges an equal volume of treated effluent. As a secondary treatment facility, it employs biological processes to reduce organic matter and suspended solids. In Mexico, wastewater treatment plants of this scale are regulated under the National Water Law (Ley de Aguas Nacionales) and must comply with official standards (NOM-001-SEMARNAT-1996) for discharge quality. The treated effluent from San Francisco Tutla is discharged into local water bodies that eventually drain into the Pacific Ocean via the Atoyac River basin. The plant plays a crucial role in protecting downstream aquatic ecosystems and public health by reducing pollutant loads before discharge.

The plant discharges into the Atoyac River basin, which flows through the Central Valleys of Oaxaca and ultimately reaches the Pacific Ocean. This watershed supports diverse aquatic life and provides water for agricultural and domestic use. The region's semi-arid climate makes water quality management critical for maintaining ecological balance and human health.