Santa Isabel Wastewater Treatment Plant, San Miguel de los Anchondo, Chihuahua

Santa Isabel is a wastewater treatment plant located in San Miguel de los Anchondo, within the municipality of Santa Isabel, Chihuahua, Mexico. The plant serves a small population of 334 residents, reflecting its role in a rural or semi-rural community. It operates with secondary treatment, which is a standard biological process for reducing organic matter and suspended solids. As a small-scale facility in Mexico, the plant is subject to national water quality regulations under the Ley de Aguas Nacionales and NOM-001-SEMARNAT, which set discharge standards for municipal wastewater. The designed capacity of 103.68 m³/day and actual discharge volume of 69.12 m³/day indicate operational headroom. Secondary treatment is appropriate for this population size, ensuring compliance with basic environmental standards. The plant discharges treated wastewater into the local watershed, which ultimately drains into the Rio Conchos basin, a tributary of the Rio Grande (Rio Bravo). This river system supports agricultural irrigation and provides habitat for aquatic species. The plant's operation helps protect downstream water quality in this arid region of northern Mexico.

The plant's treated effluent enters the local drainage network, which flows into the Rio Conchos, a major tributary of the Rio Grande (Rio Bravo). The Rio Conchos basin is ecologically important in the Chihuahuan Desert, supporting riparian habitats and migratory birds. Downstream, the Rio Grande forms the border between Mexico and the United States, where water quality is critical for both human use and sensitive ecosystems.