Divisaderos Wastewater Treatment Plant, Sonora, Mexico

Divisaderos wastewater treatment plant is located in the town of Divisaderos, in the state of Sonora, Mexico. It serves a small population of approximately 970 residents, providing secondary treatment to manage domestic wastewater. The plant has a designed capacity of 134.78 m³/day and currently discharges 193.54 m³/day of treated effluent. As a secondary treatment facility, Divisaderos meets the standard level of treatment required for municipal wastewater in Mexico under NOM-001-SEMARNAT-1996, which sets limits on pollutants in discharges to national waters. For a small community of this size, secondary treatment is typical and adequate to protect local water quality. The treated effluent from the plant is discharged into the local watershed, which is part of the Sonora River basin. The Sonora River flows through the state and eventually drains into the Gulf of California. This region is characterized by arid to semi-arid climate, and water resources are critical for both human use and ecological health. The plant plays a key role in preventing untreated sewage from entering the river system, thereby protecting downstream aquatic life and water quality.

The plant discharges into the Sonora River basin, which flows through the arid landscapes of Sonora and ultimately reaches the Gulf of California. The river supports local agriculture and provides habitat for native fish and bird species. Protecting water quality in this basin is essential for maintaining the ecological balance of the region's riparian ecosystems.