El 30 Wastewater Treatment Plant, Nuevo Centro de Población Ejidal el 30, Sinaloa

El 30 is a municipal wastewater treatment plant located in the rural community of Nuevo Centro de Población Ejidal el 30, within the municipality of Culiacán, Sinaloa, Mexico. The plant serves a population of 2,556 residents and operates with a designed capacity of 198.72 m³/day, currently discharging 241.92 m³/day of treated wastewater. As a secondary treatment facility, El 30 provides biological treatment to reduce organic matter and suspended solids. Under Mexican regulations (NOM-001-SEMARNAT-1996 and subsequent updates), secondary treatment is the standard for municipal plants, ensuring compliance with discharge limits for parameters such as BOD, TSS, and pathogens. The plant's capacity utilization suggests it is operating near or slightly above its design capacity, which is common for growing communities. The treated effluent from El 30 is discharged into local waterways that eventually drain into the Pacific Ocean via the Culiacán River basin. The region's agricultural and coastal ecosystems depend on proper wastewater management to prevent nutrient loading and protect water quality. The plant plays a key role in reducing pollution loads before discharge, supporting downstream aquatic life and human uses.

The plant's discharge enters the Culiacán River basin, which flows westward through the state of Sinaloa and empties into the Pacific Ocean near the city of Culiacán. This coastal watershed supports diverse aquatic habitats, including mangroves and estuaries that are critical for fish and bird species. Proper treatment at El 30 helps mitigate eutrophication risks and protects the ecological integrity of the downstream marine environment.