Bacoachi Wastewater Treatment Plant, Sonora, Mexico

Bacoachi is a wastewater treatment plant located in the town of Bacoachi, Sonora, Mexico. It serves a small population of 805 residents, reflecting its role in a rural community. The plant operates with secondary treatment, which is a standard biological process for reducing organic matter and suspended solids. Under Mexican regulations (NOM-001-SEMARNAT-1996), secondary treatment is required for municipal wastewater discharges to protect water quality. The plant's designed capacity is 146.02 cubic meters per day, and it currently discharges 220.32 cubic meters daily, indicating operation above design capacity. This suggests the plant may be under stress or handling additional flows. The treated effluent is discharged into the local watershed, which ultimately drains into the Gulf of California via the Sonora River basin. The region's arid climate makes water reuse and quality protection critical for downstream ecosystems and agricultural users. The plant's performance directly affects the health of receiving waters and the communities that depend on them.

The plant discharges into the Sonora River basin, which flows southwest through Sonora state and empties into the Gulf of California. This coastal region supports diverse marine life and is important for fisheries. The arid climate means water resources are scarce, and treated wastewater quality is vital for maintaining ecological balance in the river and downstream coastal waters.