Rafael Delgado Wastewater Treatment Plant, Veracruz, Mexico

The Rafael Delgado wastewater treatment plant is located in the municipality of Rafael Delgado, Veracruz, Mexico. It serves a population of 3,651, classifying it as a small-scale municipal facility. The plant is situated in an inland area, away from coastal zones. The plant provides secondary treatment, which is the standard biological treatment required for municipal wastewater in Mexico under NOM-001-SEMARNAT-1996. The designed capacity is 345.60 cubic meters per day, matching the current discharge volume, indicating full utilization. As a small agglomeration, the plant meets the national regulatory requirements for organic matter and suspended solids removal. The treated effluent is discharged into local water bodies that eventually drain into the Gulf of Mexico via the Papaloapan River basin. The plant plays a key role in protecting downstream aquatic ecosystems from untreated sewage, supporting water quality in the region's rivers and wetlands.

The plant discharges into the Papaloapan River basin, which flows through Veracruz and empties into the Gulf of Mexico. This watershed supports diverse aquatic life and is important for local fisheries. The secondary treatment reduces organic pollution, helping maintain ecological balance in the river and downstream coastal areas.