Ocoroni Wastewater Treatment Plant, Santiago de Ocoroni, Sinaloa, Mexico

The Ocoroni wastewater treatment plant is located in Santiago de Ocoroni, within the municipality of Sinaloa, in the state of Sinaloa, Mexico. It serves a population of approximately 2,647 residents, providing secondary treatment to manage municipal wastewater. The plant's designed capacity is 285.12 m³/day, with an average daily discharge of 250.56 m³/day, indicating a utilization rate of about 87.9%. As a secondary treatment facility, Ocoroni employs biological processes to reduce organic matter and suspended solids, meeting the standards required by Mexican regulations (NOM-001-SEMARNAT-1996). For a small agglomeration of this size, secondary treatment is appropriate and aligns with national norms for protecting water quality. The plant's consistent operation at near-capacity suggests it effectively handles the community's wastewater load. The treated effluent is discharged into local waterways that eventually drain into the Pacific Ocean via the Sinaloa River basin. The region's climate is semi-arid, with seasonal rainfall influencing water availability. The plant plays a crucial role in preventing untreated sewage from entering local rivers, thereby protecting downstream aquatic ecosystems and supporting the health of coastal waters.

The Ocoroni plant discharges into the Sinaloa River basin, which flows into the Pacific Ocean near the Gulf of California. This coastal watershed supports diverse marine life, including fish and crustaceans important for local fisheries. Secondary treatment reduces organic pollutants, helping to maintain water quality in the river and downstream coastal areas, which are ecologically sensitive due to their role as nursery habitats for many species.