Tepache Wastewater Treatment Plant, Sonora, Mexico

Tepache wastewater treatment plant is located in the town of Tepache, Sonora, Mexico. It serves a small population of 1,514 residents, reflecting the rural character of the area. The plant is situated inland, far from coastal zones, and its operations are part of the local municipal infrastructure. The plant provides secondary treatment, which is the standard biological treatment required under Mexican regulations (NOM-001-SEMARNAT-1996) for municipal wastewater. Although the designed capacity is 134.78 cubic meters per day, the actual discharge volume is 283.39 cubic meters per day, indicating the plant may be operating above its nominal capacity. Secondary treatment typically involves biological processes such as activated sludge or trickling filters. The treated effluent is discharged into a local water body, likely an arroyo or river within the Sonora River basin, which ultimately drains into the Gulf of California. The plant plays a key role in protecting local water quality and public health in this arid region, where water resources are scarce and sensitive to pollution.

The plant discharges into a local watercourse within the Sonora River basin, which flows southwest to the Gulf of California. This arid region experiences seasonal rainfall, and the river supports riparian habitats and agricultural activities downstream. Protecting water quality is critical for both ecological health and human use, as the basin provides water for irrigation and drinking water supplies.