Coronado Wastewater Treatment Plant, Chihuahua, Mexico

Coronado is a wastewater treatment plant located in the town of Coronado, in the state of Chihuahua, Mexico. It serves a population of approximately 1,464 residents, making it a small-scale municipal facility. The plant is situated in an inland area, far from coastal zones, and its operations are part of the local water management infrastructure. The plant provides primary treatment, which involves physical processes such as sedimentation to remove solids. It has a designed capacity of 216.00 m³/day and currently discharges 190.08 m³/day of treated wastewater. Under Mexican regulations (NOM-001-SEMARNAT-1996 and subsequent updates), primary treatment is acceptable for small communities, though higher levels may be required for discharge into sensitive water bodies. The treated effluent is discharged into a local watercourse that eventually drains into the Rio Grande basin, which flows to the Gulf of Mexico. The plant plays a key role in protecting local water quality and preventing untreated sewage from affecting downstream communities and ecosystems.

The plant discharges into a tributary of the Rio Grande (Rio Bravo) basin, which flows through northern Mexico and Texas before reaching the Gulf of Mexico. The region is semi-arid, and water resources are critical for agriculture and human consumption. The plant's primary treatment reduces suspended solids but may not fully address nutrient loads, which could contribute to downstream eutrophication if not managed. Protecting the Rio Grande's water quality is essential for both Mexican and US communities that rely on the river.