Poblado 5 de Mayo Wastewater Treatment Plant, Durango, Mexico

Poblado 5 de Mayo is a wastewater treatment plant located in the municipality of Durango, Mexico, serving the community of 5 de Mayo. The plant provides secondary treatment for a population of 3,012, reflecting its role in managing local domestic wastewater. Its design capacity of 518.40 cubic meters per day supports current flows of 285.12 m³/day, indicating operational headroom for future growth. As a secondary treatment facility, Poblado 5 de Mayo reduces organic matter and suspended solids before discharge. Mexican wastewater regulations (NOM-001-SEMARNAT-1996) set effluent quality standards for biochemical oxygen demand and total suspended solids, which secondary treatment typically meets. The plant's capacity utilization of 55% suggests efficient operation within its design parameters. The treated effluent is discharged to a receiving water body within the inland basin of Durango, ultimately contributing to the Nazas River system. This river flows into the Laguna de Mayran, an important wetland in northern Mexico that supports migratory birds and local agriculture. The plant's operation helps protect downstream water quality in this semi-arid region.

The plant discharges into the Nazas River basin, which drains into the Laguna de Mayran, a critical wetland in the Chihuahuan Desert. This lagoon supports diverse aquatic life and serves as a key stopover for migratory waterfowl along the Central Flyway. The region's semi-arid climate makes water quality management essential for maintaining ecological balance and agricultural water reuse downstream.