Ciudad Guzmán II Wastewater Treatment Plant, Ciudad Guzmán, Jalisco

Ciudad Guzmán II is a municipal wastewater treatment plant located in Ciudad Guzmán, within the municipality of Zapotlán el Grande in the southern region of Jalisco, Mexico. The plant serves a population of around 81,685 residents, placing it in the medium-to-large agglomeration category for Mexican wastewater infrastructure. As a plant in Mexico, Ciudad Guzmán II operates under the framework of the Ley de Aguas Nacionales and NOM-001-SEMARNAT-1996, which sets discharge limits for pollutants into national waters. The plant's treated effluent is discharged into local water bodies that ultimately drain into the Pacific Ocean via the Lerma-Santiago-Huicicila basin system. This region supports diverse aquatic life and agricultural activities downstream, making proper treatment essential for protecting both ecological and human water uses in the area.

Ciudad Guzmán II discharges into the Lerma-Santiago-Huicicila basin, which flows through Jalisco and into the Pacific Ocean. The downstream environment includes agricultural zones and wetlands that rely on water quality for irrigation and biodiversity. The plant's location inland, over 50 km from the coast, reduces direct marine impact but its effluent affects freshwater ecosystems that support fish and migratory bird populations.