Teotitlán del Valle Wastewater Treatment Plant - Oaxaca, Mexico

The Teotitlán del Valle wastewater treatment plant is located in the Oaxaca region of Mexico, serving a population of approximately 5,476 residents. The facility provides secondary treatment, a standard level for communities of this size in Mexico, ensuring that pollutants are reduced before discharge. With a designed capacity of 518.40 cubic meters per day and a discharge volume matching that figure, the plant operates at full capacity. As a secondary treatment facility, it meets the requirements of Mexico's official standards (NOM-001-SEMARNAT) for wastewater discharge, which set limits on biochemical oxygen demand, total suspended solids, and other parameters. The plant's treated effluent is discharged into local water bodies, contributing to the protection of the region's hydrology. The facility plays a key role in safeguarding downstream ecosystems, including rivers that drain into the Pacific Ocean. Proper treatment helps maintain water quality for agricultural and ecological uses in the Oaxaca Valley.

The plant discharges into local streams that are part of the Oaxaca Valley watershed, which ultimately drains into the Pacific Ocean via the Tehuantepec River system. The region supports diverse aquatic life and is ecologically sensitive due to its semi-arid climate and reliance on groundwater recharge. Effective wastewater treatment is critical to prevent nutrient pollution and protect downstream habitats.