Colonia Industrial Sur Wastewater Treatment Plant, Delicias, Chihuahua

Colonia Industrial Sur is a wastewater treatment plant located in the Colonia Industrial Sur neighborhood of Delicias, Chihuahua, Mexico. The facility serves a small population of 183 residents, reflecting its role in a localized community within the broader Delicias urban area. The plant is situated in an inland region of northern Mexico, characterized by arid to semi-arid climate conditions. The plant operates with secondary treatment, which is the standard biological treatment level for municipal wastewater in Mexico under the NOM-001-SEMARNAT-1996 regulation. This regulation sets maximum permissible limits for pollutants in wastewater discharges into national waters. The plant has a designed capacity of 69.12 cubic meters per day and currently discharges 17.28 cubic meters per day, indicating it operates well below its capacity. The treated effluent from the plant is discharged into local water bodies that eventually drain into the Rio Conchos basin, a major tributary of the Rio Grande (Rio Bravo). The Rio Conchos supports agricultural irrigation and provides water for communities in Chihuahua. Proper wastewater treatment is essential to protect water quality in this basin, which is vital for both human use and aquatic ecosystems.

The plant discharges into the Rio Conchos watershed, which flows through the arid landscapes of Chihuahua before joining the Rio Grande (Rio Bravo) near Presidio, Texas. The Rio Grande ultimately empties into the Gulf of Mexico. The region's limited water resources make the Rio Conchos a critical water source for agriculture and municipal supply. Effective secondary treatment helps prevent nutrient pollution and pathogen contamination, safeguarding downstream aquatic habitats and the ecological health of the Rio Grande basin.