El Bolson Wastewater Treatment Plant, El Bolsón, Sinaloa, Mexico

El Bolson wastewater treatment plant is located in the town of El Bolsón, within the municipality of Navolato, Sinaloa, Mexico. The plant serves a population of approximately 1,460 residents, reflecting its role as a small-scale municipal facility in a rural or semi-urban setting. The plant provides secondary treatment, which is the standard biological treatment process for removing organic matter and suspended solids. With a designed capacity of 164.16 m³/day and an actual discharge volume of 138.24 m³/day, the plant operates below its design capacity. Mexican wastewater treatment plants are regulated under NOM-001-SEMARNAT-1996, which sets discharge limits for pollutants into national waters. The treated effluent is discharged into local water bodies that ultimately drain into the Pacific Ocean via the Sinaloa river system. The region's coastal lagoons and estuaries support diverse aquatic life, including fish and migratory birds, making proper wastewater treatment essential for protecting downstream ecosystems.

The plant discharges into local waterways that flow through the Sinaloa lowlands, eventually reaching the Pacific Ocean via the Gulf of California. This coastal region supports mangrove forests, estuaries, and important fisheries. Proper treatment helps prevent nutrient pollution that could harm these sensitive aquatic habitats.