Seis de Octubre Wastewater Treatment Plant, Durango, Mexico

The Seis de Octubre wastewater treatment plant is located in the town of Seis de Octubre, within the municipality of Gómez Palacio, Durango, Mexico. It serves a population of approximately 2,738 residents, making it a small-scale municipal facility. The plant is situated inland, away from coastal areas, and its operations are part of the local sanitation infrastructure. The plant provides secondary treatment, which is the standard biological treatment level required for municipal wastewater in Mexico under the country's water pollution control regulations. It has a designed capacity of 432.00 m³/day and currently treats a discharge volume of 259.20 m³/day. The facility is operated as part of the municipal water management system, ensuring that treated effluent meets regulatory standards before discharge. The treated wastewater from the plant is discharged into local watercourses that eventually drain into the Nazas River basin, a key hydrological system in the arid region of northern Mexico. The Nazas River flows into the Laguna District, an important agricultural and ecological area. The plant's operation helps protect downstream water quality and supports the sustainable use of water resources in this semi-arid region.

The plant discharges into the Nazas River basin, which flows through the Comarca Lagunera region and ultimately into the Laguna District, a series of reservoirs and wetlands. This watershed supports agricultural irrigation and provides habitat for migratory birds and native aquatic species. The arid climate makes water quality management critical for both human use and ecosystem health.