Arizpe Wastewater Treatment Plant, Sonora, Mexico

The Arizpe wastewater treatment plant is located in the town of Arizpe, Sonora, Mexico. It serves a small population of 1,887 residents, reflecting the rural character of the area. The plant is situated inland, more than 10 kilometers from the coast, and its operations are part of the local municipal infrastructure. The facility provides secondary treatment, a standard level for small communities in Mexico. With a designed capacity of 432.00 cubic meters per day and a current discharge volume of 431.14, it operates near full capacity. Mexican regulations for wastewater treatment are governed by NOM-001-SEMARNAT, which sets discharge limits for pollutants based on receiving water body type. The treated effluent is discharged into local watercourses that eventually drain into the Gulf of California via the Sonora River basin. The region's arid climate makes water reuse and quality management critical for sustaining local ecosystems and agricultural activities downstream.

The plant discharges into the Sonora River basin, which flows southwest through Sonora state and empties into the Gulf of California. This coastal marine environment supports diverse aquatic life, including fish and invertebrates important for local fisheries. The arid climate means that maintaining water quality in the river is essential for both ecological health and human uses such as irrigation.