Fraccionamiento Pensiones I Etapa Fovissste Wastewater Treatment Plant, Mérida, Yucatán

Fraccionamiento Pensiones I Etapa Fovissste is a wastewater treatment plant located in Mérida, Yucatán, Mexico. It serves a small population of 228 people, reflecting its role in a residential development. The plant is situated in an inland area, away from coastal zones, and operates within the municipal infrastructure of Mérida. The plant provides secondary treatment, which is the standard level required under Mexican regulations (NOM-001-SEMARNAT-1996) for discharge into water bodies. With a designed capacity of 259.20 m³/day and a discharge volume matching that figure, the plant operates at full capacity. As a small-scale facility, it is subject to national environmental norms that set limits on pollutants in treated wastewater. The treated effluent is discharged into the local watershed, which ultimately drains into the Gulf of Mexico via the Yucatán Peninsula's karstic aquifer system. The region's porous limestone geology means that groundwater recharge is a critical environmental consideration, as it supports cenotes and coastal ecosystems. The plant's operation helps protect these sensitive water resources from untreated sewage.

The plant discharges into the Yucatán Peninsula's karstic aquifer system, which feeds cenotes and eventually drains into the Gulf of Mexico. This unique hydrogeology makes groundwater particularly vulnerable to contamination, so secondary treatment is essential to protect the region's freshwater resources and downstream marine habitats, including seagrass beds and coral reefs.