Santa Maria de Las Cuevas Wastewater Treatment Plant, Chihuahua, Mexico

Santa Maria de Las Cuevas wastewater treatment plant is located in the municipality of Doctor Belisario Domínguez, Chihuahua, Mexico. It serves a small population of 456 residents, reflecting its role in a rural or semi-urban setting. The plant is situated inland, more than 10 km from the coast, and contributes to local water management in the region. The plant provides secondary treatment, which is a standard biological process that removes organic matter and suspended solids. With a designed capacity of 112.32 units and a current discharge volume of 43.20 units, the facility operates below its full 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. For small communities, secondary treatment is typically sufficient to meet these standards. The treated effluent is discharged into a local water body, likely a stream or arroyo that drains into the larger basin of the Rio Conchos, a major tributary of the Rio Grande (Rio Bravo). This river system supports agricultural irrigation and provides water for communities downstream. The plant's operation helps protect water quality in this semi-arid region, where water resources are critical for both human use and ecosystem health.

The plant discharges into a local watercourse that flows into the Rio Conchos basin, which ultimately joins the Rio Grande (Rio Bravo) and drains into the Gulf of Mexico. This watershed supports diverse aquatic life and is an important water source for agriculture and communities in Chihuahua. The region's semi-arid climate makes water quality management crucial for sustaining downstream ecosystems and human activities.