Granados Wastewater Treatment Plant, Sonora, Mexico

Granados wastewater treatment plant is located in the small town of Granados, Sonora, Mexico, serving a population of 1,416 residents. The facility provides secondary treatment, a standard level for communities of this size in Mexico, ensuring that organic pollutants and suspended solids are significantly reduced before discharge. The plant treats an average of 279.94 cubic meters of wastewater per day, with a designed capacity of 127.87 cubic meters, indicating it operates within its capacity. As a municipal facility in Sonora, it is subject to Mexican Official Standards (NOM-001-SEMARNAT-1996) that set maximum permissible limits for pollutants in wastewater discharges into national waters. The treated effluent is discharged into the local environment, likely into an arroyo or seasonal stream that drains into the Yaqui River basin, which flows into the Gulf of California. This region is semi-arid, making water quality management critical for downstream ecosystems and agricultural users who depend on the Yaqui River for irrigation.

The plant's discharge enters the Yaqui River basin, a major hydrological system in Sonora that flows into the Gulf of California. The Yaqui River supports diverse aquatic life and is a vital water source for agriculture in the region. The Gulf of California is a biologically rich marine environment, home to endemic species and important fisheries. Proper treatment helps protect downstream water quality and ecosystem health.