Milpas Dos Wastewater Treatment Plant, Doroteo Arango, Sinaloa

Milpas Dos is a wastewater treatment plant located in the community of Los Compadres, Doroteo Arango, within the municipality of Culiacán, Sinaloa, Mexico. The plant serves a population of about 1,278 people, placing it in the small-scale category for municipal wastewater treatment. The plant provides secondary treatment, which is the standard biological treatment process required under Mexican regulations (NOM-001-SEMARNAT) for municipal wastewater. It has a designed capacity of 129.60 cubic meters per day and currently discharges 120.96 cubic meters per day, indicating it operates near its design capacity. The treated effluent is discharged into the local watershed, which ultimately drains into the Pacific Ocean via the Culiacán River system. The plant plays a role in protecting downstream water quality and aquatic habitats in the region.

The plant discharges into the Culiacán River basin, which flows through the state of Sinaloa and empties into the Pacific Ocean near the city of Culiacán. The downstream environment supports diverse aquatic life and is important for local fisheries and agriculture. Proper treatment helps reduce nutrient loading and protect the coastal ecosystem.