Villa de Mitla Wastewater Treatment Plant, San Pablo Villa de Mitla, Oaxaca

The Villa de Mitla wastewater treatment plant is located in San Pablo Villa de Mitla, Oaxaca, Mexico, serving a population of approximately 3,651 residents. The facility provides secondary treatment, which is a standard biological process that removes organic matter and suspended solids, meeting basic regulatory requirements for municipal wastewater. With a designed capacity of 777.60 m³/day and an actual discharge volume of 345.60 m³/day, the plant operates below its full capacity. In Mexico, wastewater treatment plants are regulated under the National Water Law and NOM-001-SEMARNAT-1996, which sets discharge limits for pollutants. Secondary treatment is typical for small to medium communities, ensuring compliance with environmental standards. The treated effluent is discharged into local water bodies, contributing to the protection of the region's water resources. The plant plays a vital role in safeguarding public health and the environment in the Oaxaca Valley, an area known for its cultural heritage and ecological significance.

The plant discharges into the local watershed within the Oaxaca Valley, which drains into the Pacific Ocean via the Tehuantepec River system. This region supports diverse aquatic life and is important for local agriculture. Proper treatment helps prevent nutrient pollution and protects downstream ecosystems, including coastal lagoons and estuaries.