Montemorelos I Wastewater Treatment Plant, Montemorelos, Nuevo León, Mexico

Montemorelos I is a municipal wastewater treatment plant located in Montemorelos, Nuevo León, Mexico. The facility serves an estimated population of 27,573, placing it in the medium agglomeration category for the region. As a Mexican wastewater treatment plant, Montemorelos I operates under the federal water pollution control framework administered by CONAGUA (National Water Commission). Plants of this scale are typically required to meet secondary treatment standards under NOM-001-SEMARNAT-2021, which sets maximum permissible limits for pollutants in treated wastewater discharged to national waters. The plant discharges into the local watershed, which ultimately drains into the Gulf of Mexico via the San Juan River and the Rio Grande basin. The receiving waters support diverse aquatic life and are important for regional agriculture and downstream communities.

Montemorelos I discharges into the San Juan River watershed, a tributary of the Rio Grande (Rio Bravo) that flows northeast into the Gulf of Mexico. The river system supports agricultural irrigation and provides habitat for fish and migratory birds. Downstream, the Rio Grande delta is an ecologically sensitive area with wetlands that buffer coastal ecosystems.