Ruiz Wastewater Treatment Plant, Ruiz, Nayarit, Mexico

The Ruiz wastewater treatment plant is a municipal facility located in the town of Ruiz, Nayarit, Mexico. It serves a population of about 18,109 residents, classifying it as a medium-sized agglomeration under Mexican wastewater regulations. The plant is situated inland, more than 50 kilometers from the Pacific coast, and its operations are part of the regional sanitation infrastructure. As a Mexican wastewater facility, the plant is subject to the national water quality standards (NOM-001-SEMARNAT-1996 and subsequent updates) which set discharge limits for pollutants. For a plant serving this population size, secondary treatment is typically required to meet these standards. The regulatory framework ensures compliance with environmental norms. The treated effluent from the Ruiz plant is discharged into local water bodies that eventually drain into the Pacific Ocean via the San Pedro Mezquital River system. This river basin supports diverse aquatic life and provides water for agricultural and domestic use downstream. Proper treatment is essential to protect the ecological health of the river and the coastal waters of Nayarit.

The Ruiz plant discharges into the San Pedro Mezquital River basin, which flows through Nayarit and empties into the Pacific Ocean near the Marismas Nacionales region. This area is ecologically sensitive, supporting mangroves, wetlands, and migratory bird habitats. The river's water quality is critical for local fisheries and biodiversity, making effective wastewater treatment important for preserving downstream ecosystems.