Janos Wastewater Treatment Plant, Chihuahua, Mexico

The Janos wastewater treatment plant is located in the town of Janos, Chihuahua, Mexico. It serves a population of approximately 4,291 residents, making it a small-scale municipal facility. The plant is situated in an inland, arid region near the US-Mexico border. The plant provides secondary treatment, which is the standard biological treatment process for municipal wastewater. With a designed capacity of 561.60 m³/day and an average discharge volume of 475.20 m³/day, the facility operates at around 85% capacity. As a Mexican plant, it is subject to national water quality standards (NOM-001-SEMARNAT) that regulate pollutant discharges into receiving waters. The treated effluent is discharged into the local watershed, which drains into the Rio Grande/Rio Bravo basin. The region's arid climate means water resources are scarce, making the plant's role in protecting local water quality and enabling potential water reuse important for the community and downstream ecosystems.

The plant discharges into the Rio Grande/Rio Bravo basin, which flows through Chihuahua and eventually reaches the Gulf of Mexico. The local watershed supports limited but ecologically sensitive riparian habitats in an arid region. The treated effluent contributes to maintaining base flows in intermittent streams, which are critical for wildlife and agricultural users downstream.