Bonfil Wastewater Treatment Plant, Ejido Pátzcuaro, Baja California

Bonfil is a wastewater treatment plant located in Ejido Pátzcuaro, within the municipality of Mexicali, Baja California, Mexico. The plant serves a small population of 274 residents, reflecting its role in a rural or peri-urban community. It is situated near the US-Mexico border, in an arid region characterized by agricultural and industrial activity. The plant operates with secondary treatment, which is the standard level required for municipal wastewater under Mexican regulations (NOM-001-SEMARNAT-1996). Secondary treatment typically involves biological processes to reduce organic matter and suspended solids. The designed capacity is 518.40 m³/day, with a reported discharge volume of 25.92 m³/day, indicating the plant operates well below its capacity. The treated effluent is discharged into the local environment, likely into an arroyo or canal that drains into the Colorado River basin or the Salton Sea. The region's water resources are critical for agriculture and ecosystems, making proper wastewater treatment essential for protecting downstream water quality and public health.

The plant is located in the Colorado River basin, which ultimately drains into the Gulf of California (Sea of Cortez). This watershed supports diverse aquatic life and is a vital water source for agriculture and urban areas in both Mexico and the United States. The arid climate and intensive water use make the region's water bodies sensitive to pollution, so effective wastewater treatment is crucial for maintaining ecological balance and preventing eutrophication.