San Pedro y San Pablo Ayutla Wastewater Treatment Plant, Oaxaca, Mexico

The San Pedro y San Pablo Ayutla wastewater treatment plant is located in the municipality of San Pedro y San Pablo Ayutla, Oaxaca, Mexico. Serving a population of approximately 1,369 people, this facility is part of the region's municipal wastewater infrastructure. The plant is situated inland, more than 10 km from the coast, and operates under Mexico's national water regulations. The plant provides secondary treatment, a standard level for communities of this size in Mexico. With a designed capacity of 234.14 cubic meters per day and an average discharge volume of 129.60 cubic meters per day, the facility manages the wastewater generated by the local population. Treatment processes are designed to reduce organic matter and suspended solids before discharge. The treated effluent is released into local water bodies, which eventually drain into the Pacific Ocean via the region's river systems. The plant plays a crucial role in protecting downstream ecosystems and water quality in the Oaxaca region. Its operation helps prevent untreated sewage from entering rivers and streams, supporting aquatic life and public health.

The plant discharges into local streams that are part of the Papaloapan River basin, which flows into the Gulf of Mexico. This watershed supports diverse aquatic habitats and is important for regional biodiversity. The secondary treatment provided helps reduce nutrient loading and organic pollution, protecting downstream water quality and ecological balance.