Chilapa Wastewater Treatment Plant, Nayarit, Mexico - Secondary Treatment Facility

Chilapa wastewater treatment plant is located in the town of Chilapa, within the municipality of Rosamorada, Nayarit, Mexico. The plant serves a population of approximately 1,888 people and operates as a municipal facility under Mexican water regulations. The plant provides secondary treatment, which is the standard biological treatment level required for urban wastewater in Mexico under NOM-001-SEMARNAT-1996. With a designed capacity of 950.40 m³/day and a current discharge volume of 691.20 m³/day, the plant operates below its maximum capacity, indicating room for future growth. The treated effluent is discharged into local water bodies that eventually drain into the Pacific Ocean via the San Pedro Mezquital River basin. The surrounding region supports diverse aquatic life and agricultural activities, making proper wastewater treatment essential for protecting downstream ecosystems and public health.

The plant discharges into the San Pedro Mezquital River basin, which flows through Nayarit and into the Pacific Ocean near the Marismas Nacionales, a large coastal wetland system. This area is ecologically sensitive, supporting migratory birds and diverse aquatic species. Proper secondary treatment helps reduce nutrient and pathogen loads, protecting downstream water quality and the health of the coastal ecosystem.