Huatulco Wastewater Treatment Plant, Santa María Huatulco, Oaxaca

The Huatulco wastewater treatment plant is located in Santa María Huatulco, Oaxaca, Mexico, serving a population of approximately 5,476 residents. As a secondary treatment facility, it plays a key role in managing municipal wastewater in this coastal region of southern Mexico. The plant operates under Mexico's national water regulations, which require secondary treatment for urban wastewater. With a designed capacity of 518.40 volume units, the facility is sized to handle the local population's wastewater load. The treatment process ensures that effluent meets regulatory standards before discharge. The treated wastewater is discharged into local inland water bodies, ultimately draining into the Pacific Ocean via the region's hydrological network. The plant helps protect downstream ecosystems, including coastal lagoons and marine habitats that support diverse aquatic life and are important for local fisheries and tourism.

The plant discharges into inland water bodies that flow toward the Pacific coast of Oaxaca. The region's watershed supports ecologically sensitive coastal lagoons and mangrove systems, which provide critical habitat for migratory birds and marine species. Proper wastewater treatment is essential to prevent nutrient pollution and protect these downstream environments.