Estacion San Manuel Wastewater Treatment Plant, San Manuel, Tabasco, Mexico

Estacion San Manuel is a municipal wastewater treatment plant located in the town of San Manuel, within the municipality of Huimanguillo, Tabasco, Mexico. The plant serves a population of around 3,195 residents and is situated in a region characterized by tropical climate and significant rainfall, typical of the Grijalva-Usumacinta basin. The plant provides secondary treatment, which is the standard level required under Mexican regulations (NOM-001-SEMARNAT-1996) for discharges into inland water bodies. With a designed capacity of 453.60 m³/day and an average discharge of 302.40 m³/day, the facility operates below its full capacity, indicating room for future growth or seasonal variations. The treated effluent is discharged into local watercourses that eventually drain into the Grijalva River system, one of Mexico's largest river basins. This river system flows into the Gulf of Mexico, supporting diverse aquatic ecosystems and providing water for agriculture and communities downstream. The plant plays a key role in protecting water quality in this ecologically sensitive region.

The plant discharges into the Grijalva River basin, which flows through Tabasco and into the Gulf of Mexico. This watershed supports a rich diversity of aquatic life, including fish and migratory birds, and is vital for local fisheries and agriculture. The region's high rainfall and flat terrain make water management critical to prevent flooding and pollution.