Colonia Buenos Aires Wastewater Treatment Plant, Sinaloa, Mexico

Colonia Buenos Aires is a wastewater treatment plant located in the Elota municipality of Sinaloa, Mexico. It serves a small population of 456 residents, reflecting its role in a rural or peri-urban community. The plant is situated near the Pacific coast, within 10 km of the shoreline. The plant provides secondary treatment, which is the standard biological treatment required under Mexican regulations (NOM-001-SEMARNAT-1996) for municipal wastewater. With a designed capacity of 69.12 units and a current discharge volume of 43.20 units, the plant operates below its full capacity. The regulatory framework in Mexico mandates compliance with discharge limits to protect water bodies. The treated effluent is discharged into the local environment, likely into a nearby river or directly into the Pacific Ocean via coastal drainage. The region's watershed ultimately drains into the Gulf of California, supporting diverse marine and coastal ecosystems. The plant's proximity to the coast underscores the importance of effective treatment to prevent nutrient and pathogen pollution.

The plant discharges into the Pacific coastal watershed of Sinaloa, which drains into the Gulf of California. This region supports ecologically sensitive mangrove estuaries and marine habitats, including important fisheries. Effective secondary treatment helps reduce organic load and pathogens, protecting downstream coastal water quality and aquatic life.