R_A Pocvicuc Wastewater Treatment Plant, Pocvicuc, Tabasco, Mexico

R_A Pocvicuc is a municipal wastewater treatment plant located in the community of Pocvicuc, within the municipality of Emiliano Zapata, Tabasco, Mexico. The plant serves a small population of 394 residents, reflecting its role in a rural or peri-urban setting. Its location in the southeastern region of Mexico places it within a tropical climate zone with high rainfall and significant surface water resources. The plant provides secondary treatment, which is the standard biological treatment stage that removes organic matter and suspended solids. With a designed capacity of 86.40 cubic meters per day and a discharge volume matching that figure, the facility operates at full capacity. Under Mexican regulations (NOM-001-SEMARNAT-1996 and subsequent updates), secondary treatment is required for discharges into national waters, and plants of this scale must comply with effluent quality standards for parameters such as BOD, TSS, and coliforms. The treated effluent is discharged into local water bodies that ultimately drain into the Grijalva River basin, one of Mexico's largest hydrological systems. The Grijalva River flows northward through Tabasco and empties into the Gulf of Mexico via the Grijalva-Usumacinta delta, a region of high ecological importance. The plant's operation helps protect downstream aquatic ecosystems and supports water quality in a region known for its wetlands and biodiversity.

The plant's discharge enters local streams that are part of the Grijalva River basin, which drains into the Gulf of Mexico. The Grijalva-Usumacinta delta is a critical wetland ecosystem supporting diverse aquatic life, including fish, crustaceans, and migratory birds. The region's tropical climate and flat terrain make it susceptible to flooding, and maintaining water quality is essential for both ecological health and local livelihoods such as fishing and agriculture.