Cerro de Los Sánchez Wastewater Treatment Plant, Sinaloa, Mexico

The Cerro de Los Sánchez wastewater treatment plant is located in the small community of Cerro de los Sánchez, within the municipality of Angostura, Sinaloa, Mexico. This facility serves a population of 274 residents, reflecting its role in managing domestic wastewater for a rural agglomeration. The plant operates under Mexico's national water regulations, which mandate treatment standards for communities of this size. The plant provides secondary treatment, a standard biological process that removes organic matter and suspended solids. With a designed capacity of 34.56 m³/day and an average discharge volume of 25.92 m³/day, the facility operates below its maximum capacity, indicating room for future growth. As a secondary treatment plant, it meets the basic requirements for protecting local water quality. The treated effluent is discharged into the local watershed, which ultimately drains into the Pacific Ocean via the Gulf of California. The surrounding region of Sinaloa is agriculturally productive, and the plant's operation helps safeguard downstream ecosystems, including coastal lagoons and estuaries that support diverse aquatic life and migratory birds.

The plant discharges into the local drainage network that flows into the Gulf of California, a biologically rich marine environment. This region supports important fisheries and migratory bird habitats. Proper wastewater treatment is essential to prevent nutrient loading and protect the coastal ecosystem from eutrophication and pathogen contamination.