San Jose de Las Flores Wastewater Treatment Plant, Zapotlanejo, Jalisco

San Jose de Las Flores is a wastewater treatment plant located in Zapotlanejo, within the Región Centro of Jalisco, Mexico. The facility serves a small community of approximately 1,825 people, reflecting its role in local sanitation infrastructure for this inland municipality. The plant operates with secondary treatment, which is the standard level required under Mexican regulations (NOM-001-SEMARNAT-1996) for municipal wastewater before discharge. Its design capacity of 172.80 volume units matches the reported discharge volume, indicating consistent operation at full capacity. As a secondary treatment facility, it removes organic matter and suspended solids, though not nutrients like nitrogen and phosphorus. The treated effluent is discharged into local watercourses that ultimately drain into the Pacific Ocean via the Santiago River basin. This region of Jalisco is part of the Lerma-Santiago-Pacific hydrological system, which supports agricultural irrigation and downstream ecosystems. The plant's operation helps protect water quality in this important watershed.

The plant discharges into the Santiago River basin, which flows westward through Jalisco and eventually reaches the Pacific Ocean near San Blas, Nayarit. This watershed supports diverse aquatic life and provides water for agricultural and urban uses downstream.