Colonia Veintisiete de Noviembre Wastewater Treatment Plant, Sinaloa, Mexico

Colonia Veintisiete de Noviembre wastewater treatment plant is located in the municipality of Salvador Alvarado, Sinaloa, Mexico. It serves a small population of 1,095 residents, reflecting its role in managing domestic wastewater for a rural community. The plant operates with secondary treatment, a standard level for small agglomerations under Mexican regulations (NOM-001-SEMARNAT-1996), which sets discharge limits for pollutants. The plant has a designed capacity of 112.32 cubic meters per day and currently treats 103.68 cubic meters daily, indicating near-capacity operation. As a secondary treatment facility, it reduces organic matter and suspended solids before discharge. The plant's performance is subject to Mexican environmental standards, which require compliance with maximum permissible limits for parameters like BOD, TSS, and pathogens. The treated effluent is discharged into local water bodies that eventually drain into the Pacific Ocean via the Sinaloa River basin. The region's semi-arid climate and agricultural activities make water quality management crucial for downstream ecosystems and human use. The plant contributes to protecting local streams and groundwater from untreated sewage, supporting public health and environmental sustainability.

The plant's discharge enters local waterways that flow into the Sinaloa River system, which drains into the Pacific Ocean near the Gulf of California. This coastal region supports diverse aquatic life, including fish and migratory birds, and is important for local fisheries and agriculture. Effective treatment helps prevent nutrient pollution and pathogen contamination in downstream waters.