Santa Rosalia Wastewater Treatment Plant, Chihuahua, Mexico

Santa Rosalia is a municipal wastewater treatment plant located in the town of Santa Rosalia, within the municipality of Matamoros, Chihuahua, Mexico. The plant serves a small population of 278 residents, reflecting its role in a rural or peri-urban community. It is situated inland, far from coastal areas, and operates under Mexico's national water quality regulations. The plant provides secondary treatment, which is appropriate for its small scale. With a design capacity of 86.40 m³/day and a current discharge volume of 69.12 m³/day, it operates at approximately 80% capacity. This level of treatment and capacity aligns with typical standards for small agglomerations in Mexico, where secondary treatment is commonly required to reduce organic pollutants and suspended solids before discharge. The treated effluent is likely discharged into a local watercourse that eventually drains into the Rio Grande basin or an internal basin within Chihuahua. The plant's operation helps protect local water quality and supports the ecological health of downstream water bodies, which are important for agriculture and local biodiversity in this semi-arid region.

The plant discharges into a local watercourse that is part of the interior drainage basin of northern Mexico, ultimately flowing into the Rio Grande or an endorheic basin. The region's semi-arid climate means water resources are scarce, making the plant's role in maintaining water quality critical for downstream ecosystems and agricultural use. The treated effluent supports aquatic life and prevents contamination of groundwater, which is vital for local communities.