Ciudad Guzmán I Wastewater Treatment Plant, Ciudad Guzmán, Jalisco

Ciudad Guzmán I is a municipal wastewater treatment plant located in Ciudad Guzmán, within the municipality of Zapotlán el Grande in the state of Jalisco, Mexico. The plant serves a population of 45,636, placing it in the medium agglomeration category for Mexican wastewater infrastructure. The plant operates under Mexico's national water regulations, which require treatment to meet discharge standards for receiving water bodies. Plants of this scale typically employ secondary treatment processes to reduce organic load and suspended solids before discharge. The plant discharges into local watercourses that ultimately drain into the Pacific Ocean via the Lerma-Santiago basin. The surrounding region is ecologically significant, supporting diverse aquatic life and agricultural activities that depend on water quality.

Ciudad Guzmán I discharges treated wastewater into the local drainage network, which flows into the Lerma River and eventually reaches the Pacific Ocean via the Santiago River. The plant's location in the Región Sur of Jalisco places it within a watershed that supports irrigated agriculture and freshwater ecosystems. Protecting water quality in this basin is critical for downstream communities and the ecological health of the Lerma-Santiago system.