San Vicente Wastewater Treatment Plant, Nayarit, Mexico

San Vicente wastewater treatment plant is located in the town of San Vicente, within the municipality of Rosamorada, Nayarit, Mexico. The plant serves a population of 9,584, classifying it as a small to medium agglomeration under Mexican wastewater regulations. It is situated inland, approximately 21.9°N, 105.3°W, in the Pacific coastal region. The plant provides secondary treatment, which is the standard level required for municipal wastewater in Mexico under NOM-001-SEMARNAT-1996. With a designed capacity of 1,641.60 m³/day and an actual discharge volume of 907.20 m³/day, the facility operates below its capacity, indicating room for future growth. Secondary treatment typically involves biological processes such as activated sludge or trickling filters. The treated effluent is discharged into local water bodies that eventually drain into the Pacific Ocean via the San Pedro Mezquital River or nearby coastal lagoons. The region's watershed supports diverse aquatic life and is important for local fisheries and agriculture. Proper wastewater treatment helps protect downstream ecosystems and public health in this rural area of Nayarit.

The plant discharges into local waterways that flow toward the Pacific Ocean, likely via the San Pedro Mezquital River system or adjacent coastal lagoons. This watershed supports mangrove forests, estuaries, and marine habitats that are ecologically sensitive and provide nursery grounds for fish and crustaceans. Effective treatment reduces nutrient and pathogen loads, safeguarding water quality for downstream communities and ecosystems.