Bufalo Wastewater Treatment Plant, Chihuahua, Mexico - Secondary Treatment for Small Community

Bufalo is a wastewater treatment plant located in the small community of Bufalo, within the municipality of Allende, Chihuahua, Mexico. Serving a population of 373, it is a small-scale facility that provides secondary treatment for municipal wastewater. The plant is situated in an inland area, far from coastal zones, and its operations are part of the local water management infrastructure in northern Mexico. The plant employs secondary treatment, a standard biological process that removes organic matter and suspended solids. With a design capacity of 172.80 cubic meters per day and an average discharge volume of 129.60 m³/day, the facility operates at approximately 75% capacity. In Mexico, wastewater treatment plants are regulated under the National Water Law (Ley de Aguas Nacionales) and NOM-001-SEMARNAT-1996, which sets discharge limits for pollutants into national waters. For small communities like Bufalo, secondary treatment is typically sufficient to meet these standards. The treated effluent from the plant is discharged into local water bodies that eventually drain into the Rio Conchos basin, a tributary of the Rio Grande (Rio Bravo). The Rio Conchos is a vital water source for agriculture and ecosystems in Chihuahua, supporting diverse aquatic life and providing irrigation for the region. Downstream, the Rio Grande flows into the Gulf of Mexico, making the plant's operations important for both local and transboundary water quality.

The plant discharges into the Rio Conchos watershed, which flows into the Rio Grande (Rio Bravo) and ultimately reaches the Gulf of Mexico. This river system supports agricultural irrigation and diverse aquatic habitats in the arid Chihuahuan Desert region. The plant's secondary treatment helps protect downstream water quality, reducing organic pollution and maintaining ecological balance in a water-scarce area.