Ejido Culiacán Wastewater Treatment Plant, Sinaloa, Mexico

Ejido Culiacán (Culiacancito) is a small wastewater treatment plant located in the municipality of Elota, Sinaloa, Mexico. Serving a population of 456, it is a secondary treatment facility that handles a daily discharge volume of 43.20 m³ against a designed capacity of 146.88 m³. The plant is situated near the Pacific coast, less than 10 km inland. As a secondary treatment plant, Ejido Culiacán meets the standard level required for municipal wastewater in Mexico under the national water law (Ley de Aguas Nacionales) and NOM-001-SEMARNAT-1996, which sets discharge limits for pollutants. For small communities like this, secondary treatment is typical to reduce organic matter and suspended solids before discharge. The plant's treated effluent likely drains into local watercourses that flow toward the Pacific Ocean, contributing to the coastal ecosystem of Sinaloa. The region supports diverse marine life and is important for fisheries and tourism. Proper treatment helps protect these downstream environments from nutrient pollution and pathogens.

The plant discharges into local streams that eventually reach the Pacific Ocean near the Gulf of California. This coastal area supports mangrove forests, estuaries, and marine habitats that are ecologically sensitive. Nutrient and pathogen removal through secondary treatment is critical to prevent eutrophication and protect aquatic life in the receiving waters.