San Javier Wastewater Treatment Plant, San Ignacio, Sinaloa, Mexico

San Javier is a secondary-level wastewater treatment plant located in the town of San Javier, within the municipality of San Ignacio, Sinaloa, Mexico. The plant serves a small population of approximately 587 residents, reflecting its role in a rural or semi-rural community. Its designed capacity matches the discharge volume of 103.68 cubic meters per day, indicating consistent operation at full capacity. As a secondary treatment facility, San Javier employs biological processes to reduce organic matter and suspended solids, meeting standard Mexican regulatory requirements for wastewater treatment. Under Mexico's NOM-001-SEMARNAT-1996 and subsequent updates, secondary treatment is the baseline for discharges into national waters, ensuring protection of public health and the environment. The treated effluent from San Javier is discharged into local surface waters, likely contributing to the Presidio River basin or nearby arroyos that drain into the Pacific Ocean. The region's semi-arid climate and agricultural activities make proper wastewater management critical for maintaining water quality in downstream ecosystems, including coastal lagoons and estuaries that support diverse aquatic life.

The plant's discharge enters local waterways that flow toward the Pacific coast of Sinaloa, a region characterized by mangrove-lined lagoons and estuaries. These coastal ecosystems provide critical habitat for migratory birds, fish, and crustaceans. Proper treatment helps prevent nutrient loading and pathogen contamination that could harm these sensitive environments.