Cubiri de Portelas Wastewater Treatment Plant, Sinaloa, Mexico

Cubiri de Portelas is a wastewater treatment plant located in the municipality of Sinaloa, in the state of Sinaloa, Mexico. It serves a population of approximately 3,377 residents, classifying it as a small-scale municipal facility. The plant is situated inland, more than 10 kilometers from the coast, and its operations are part of the local water management infrastructure. The plant provides secondary treatment, which is the standard biological treatment process for removing organic matter and suspended solids. With a designed capacity of 345.60 cubic meters per day and an actual discharge volume of 319.68 cubic meters per day, it operates near its designed capacity. Under Mexican regulations (NOM-001-SEMARNAT-1996 and subsequent updates), secondary treatment is required for municipal wastewater to meet discharge standards for receiving water bodies. The treated effluent is discharged into local watercourses that eventually drain into the Pacific Ocean via the Gulf of California. The surrounding region includes agricultural areas and small communities, making the plant's role important for protecting local water quality and downstream ecosystems. The Sinaloa watershed supports diverse aquatic life and is part of a larger hydrological network that flows into the Pacific.

The plant discharges into local streams that are part of the Sinaloa River basin, which flows into the Gulf of California, an ecologically rich marine environment. This region supports diverse aquatic species and is an important migratory corridor for marine life. The secondary treatment helps reduce organic pollution and protect downstream water quality in this sensitive coastal ecosystem.