Macultepec Wastewater Treatment Plant, Ocuiltzapotlán, Tabasco, Mexico

Macultepec is a wastewater treatment plant located in the town of Macultepec, within the municipality of Centro, Tabasco, Mexico. It serves the nearby city of Ocuiltzapotlán and surrounding areas, with a population equivalent of about 114,000 people. The plant is situated in the low-lying, humid tropical region of southeastern Mexico, near the Grijalva River system. As a facility serving a large agglomeration (over 100,000 people), Macultepec is expected to provide at least secondary treatment under Mexican water quality regulations (NOM-001-SEMARNAT-1996 and subsequent updates). These standards set maximum permissible limits for pollutants in wastewater discharges into national waters. The plant's design capacity and treatment process details are not publicly available, but its scale suggests it plays a key role in local sanitation infrastructure. The treated effluent from Macultepec likely discharges into a tributary of the Grijalva River, one of Mexico's major river systems. The Grijalva flows northward through Tabasco into the Gulf of Mexico, supporting diverse aquatic ecosystems and providing water for agriculture and human consumption. Proper treatment is essential to protect water quality in this ecologically sensitive region, which includes wetlands and coastal lagoons.

Macultepec plant discharges into the Grijalva River basin, which drains into the Gulf of Mexico. The Grijalva River is a vital waterway in southeastern Mexico, supporting rich biodiversity including fish, crustaceans, and migratory birds. The lower basin features extensive wetlands and floodplains that provide natural water filtration and habitat. Effective wastewater treatment is critical to prevent nutrient loading and contamination that could harm these sensitive ecosystems and downstream coastal areas.