Cubiri de La Capilla Wastewater Treatment Plant, Casas Nuevas, Sinaloa

Cubiri de La Capilla is a municipal wastewater treatment plant located in Casas Nuevas, within the municipality of Sinaloa, Sinaloa, Mexico. The plant serves a population of approximately 1,369 residents, classifying it as a small-scale facility in the region. The plant provides secondary treatment, which is the standard biological treatment process for removing organic matter and suspended solids. With a designed capacity of 146.88 cubic meters per day and an actual discharge volume of 129.60 cubic meters per day, the facility operates at about 88% capacity. Mexican wastewater treatment plants are regulated under the Federal Law for Water Pollution Prevention and Control (Ley Federal de Prevención y Contaminación del Agua) and NOM-001-SEMARNAT-1996, which sets discharge limits for pollutants. The treated effluent is discharged into local waterways that eventually drain into the Pacific Ocean via the Sinaloa River basin. The region's aquatic ecosystems depend on proper wastewater treatment to maintain water quality and support biodiversity. The plant plays a key role in protecting downstream water bodies from untreated sewage.

The plant discharges into the Sinaloa River basin, which flows westward through the state of Sinaloa and empties into the Pacific Ocean. This coastal watershed supports diverse aquatic life, including fish and migratory birds. Proper treatment is essential to prevent nutrient pollution and protect the ecological health of the river and its receiving marine environment.