Bermejillo Wastewater Treatment Plant - Durango, Mexico

Bermejillo wastewater treatment plant is located in the town of Bermejillo, within the municipality of Mapimí, Durango, Mexico. The facility serves a small population of 4,564 residents, providing secondary treatment to municipal wastewater. It has a designed capacity of 864.00 cubic meters per day and currently discharges 518.40 cubic meters of treated effluent daily. The plant operates under Mexico's federal water law (Ley de Aguas Nacionales) and is regulated by the National Water Commission (CONAGUA). For small agglomerations like Bermejillo, secondary treatment is the standard requirement to reduce organic pollutants and suspended solids before discharge. The facility's treatment process ensures compliance with national discharge standards. The treated effluent is discharged into local water bodies that eventually drain into the endorheic basin of the Bolsón de Mapimí, an arid region with limited surface water. The plant plays a crucial role in protecting local groundwater and preventing contamination of the fragile desert ecosystem, which supports endemic species and migratory birds.

The Bermejillo plant discharges into the Bolsón de Mapimí basin, a closed (endorheic) watershed in northern Mexico's Chihuahuan Desert. This arid region has no outlet to the sea, making water quality management critical for local ecosystems. The basin supports unique desert flora and fauna, including the endangered Bolson tortoise and various migratory bird species. Proper wastewater treatment prevents nutrient loading and contamination of scarce groundwater resources.