Villa Antigua Wastewater Treatment Plant, San Luis Potosí, Mexico

Villa Antigua is a municipal wastewater treatment plant located in the Centro Histórico area of San Luis Potosí, Mexico. It serves a population of approximately 2,282 residents, classifying it as a small-scale facility within the city's wastewater infrastructure. The plant is situated in the state of San Luis Potosí, an inland region with a semi-arid climate. The plant provides secondary treatment, a standard level for small communities in Mexico, which typically involves biological processes to reduce organic matter and suspended solids. With a designed capacity of 950.40 m³/day and an actual discharge volume of 518.40 m³/day, the facility operates below its full capacity. Mexican wastewater treatment plants are regulated under the Federal Law for Water and the official standards (NOM-001-SEMARNAT-1996) that set discharge limits for pollutants. The treated effluent from Villa Antigua is discharged into local water bodies that eventually drain into the Gulf of Mexico via the Pánuco River system. The plant plays a role in protecting downstream aquatic ecosystems and water quality in the region, which supports diverse freshwater habitats and agricultural activities.

The plant discharges into the local drainage network that flows into the Pánuco River basin, ultimately reaching the Gulf of Mexico. This watershed supports a variety of aquatic life and is important for regional water supply and agriculture. The semi-arid climate of San Luis Potosí makes water quality management critical for maintaining ecological balance and human use.