Bajos de Chila Wastewater Treatment Plant, Puerto Escondido, Oaxaca, Mexico

Bajos de Chila is a wastewater treatment plant located in Puerto Escondido, a coastal city in the state of Oaxaca, Mexico. The plant serves a population of approximately 9,127 residents, making it a medium-sized facility for the region. It is situated near the Pacific Ocean, within 10 kilometers of the coast. The plant provides secondary treatment, which is the standard level required under Mexican regulations (NOM-001-SEMARNAT-1996) for municipal wastewater before discharge. With a designed capacity of 864 cubic meters per day and a similar discharge volume, the plant operates at full capacity. As a coastal facility, it must meet stringent effluent quality standards to protect marine environments. The treated effluent is discharged into the Pacific Ocean, likely via a local stream or direct outfall. The surrounding area includes beaches and coastal ecosystems that support tourism and fisheries. Proper treatment is essential to prevent nutrient pollution and protect water quality in the region.

The plant discharges into the Pacific Ocean near Puerto Escondido, a coastal area known for its beaches and marine biodiversity. The local watershed drains directly to the ocean, making the plant's effluent a potential source of nutrients and pathogens if not adequately treated. The region supports important coastal habitats, including mangroves and estuaries, which are sensitive to pollution.