Arivechi Wastewater Treatment Plant, Sonora, Mexico

The Arivechi wastewater treatment plant is located in the town of Arivechi, Sonora, Mexico, on Calle Progreso. It serves a small population of 784 residents, reflecting the rural character of the area. The plant provides secondary treatment, which is appropriate for communities of this size in Mexico. With a designed capacity of 157.25 cubic meters per day and a current discharge volume of 120.10 cubic meters per day, the plant operates below its full capacity. As a Mexican facility, it is subject to national water quality standards (NOM-001-SEMARNAT-1996) that regulate pollutant discharges into receiving waters. Secondary treatment typically involves biological processes to reduce organic matter and suspended solids. The treated effluent is discharged into local watercourses that eventually drain into the Yaqui River basin, which flows into the Gulf of California. The plant plays a key role in protecting downstream water quality and the ecological health of the region's arid river systems.

The plant's discharge enters the Yaqui River basin, which flows through Sonora's semi-arid landscape before reaching the Gulf of California. This watershed supports diverse aquatic life and is important for local agriculture. The downstream environment includes estuaries and coastal habitats that rely on adequate water quality from upstream treatment facilities.