El Charco Wastewater Treatment Plant, Chihuahua, Mexico

El Charco wastewater treatment plant is located in the town of El Charco, within the municipality of Chihuahua, in the state of Chihuahua, Mexico. The plant serves a small population of 346 residents, reflecting its role in a rural or semi-urban community. It is situated inland, more than 10 kilometers from the coast, and operates under Mexico's federal water management framework. The plant provides secondary treatment, which is the standard biological treatment required for municipal wastewater under Mexican regulations (NOM-001-SEMARNAT-1996). With a designed capacity of 146.88 cubic meters per day and an actual discharge volume of 43.20 cubic meters per day, the plant operates well below its capacity, indicating potential for future growth or seasonal variability. Secondary treatment typically involves activated sludge or similar biological processes. The treated effluent is discharged into a local water body, likely a stream or arroyo that drains into the larger Rio Conchos basin, which ultimately flows into the Rio Grande (Rio Bravo) and then to the Gulf of Mexico. The plant's operation helps protect local water quality and downstream ecosystems, including the Rio Conchos, which supports diverse aquatic life and is an important water source for agriculture and communities in the region.

The plant discharges into a local watercourse that is part of the Rio Conchos watershed, a major tributary of the Rio Grande (Rio Bravo). The Rio Conchos flows through the Chihuahuan Desert, providing critical water resources for agriculture and wildlife. Downstream, the Rio Grande empties into the Gulf of Mexico, supporting estuarine habitats and migratory bird species. The plant's secondary treatment helps reduce organic pollutants and protect these downstream ecosystems.