Cuviac Wastewater Treatment Plant, Tacotalpa, Tabasco, Mexico

Cuviac is a wastewater treatment plant located in Tacotalpa, within the state of Tabasco, Mexico. The facility serves a small population of 2,327 residents, reflecting its role in managing domestic wastewater for this community. As a secondary treatment plant, it provides biological treatment to reduce organic matter and suspended solids before discharge. The plant operates with a designed capacity of 259.20 cubic meters per day, and current discharge volume is 220.32 cubic meters per day, indicating it is operating below its designed capacity. Under Mexican regulations (NOM-001-SEMARNAT-1996 and subsequent updates), secondary treatment is the standard for municipal wastewater, ensuring compliance with discharge limits for biochemical oxygen demand and total suspended solids. The treated effluent is discharged into local water bodies that ultimately drain into the Grijalva River basin, a major hydrological system in southern Mexico. This river flows into the Gulf of Mexico, supporting diverse aquatic ecosystems and providing water for agriculture and communities downstream. The plant's operation helps protect these waters from untreated sewage pollution.

The Cuviac plant discharges into local streams that are part of the Grijalva River basin, which flows northward through Tabasco and into the Gulf of Mexico. This watershed supports a variety of aquatic life and is important for regional biodiversity, including mangrove forests and wetlands near the coast. The secondary treatment provided by the plant reduces organic pollutants, helping to maintain water quality in this ecologically sensitive area.