La Purísima Wastewater Treatment Plant - Jiquipilco, Estado de México

La Purísima is a wastewater treatment plant located in the community of Manzana Tercera De Santa Cruz Tepexpan, within the municipality of Jiquipilco in Estado de México, Mexico. The plant serves a small population of 456 residents, reflecting its role in a rural or semi-urban setting. Its location in the central highlands of Mexico places it within a region characterized by seasonal rainfall and a complex hydrological network. The plant provides secondary treatment, which is the standard biological treatment process that removes organic matter and suspended solids. With a designed capacity of 86.40 volume units and an actual discharge volume of 43.20 volume units, the plant operates at about 50% of its capacity. Under Mexican regulations (NOM-001-SEMARNAT-1996 and subsequent updates), secondary treatment is required for discharges into national waters, and this plant complies with that standard. The treated effluent from La Purísima likely discharges into a local stream or river that eventually flows into the Lerma River basin, one of Mexico's most important watersheds. The Lerma River drains into Lake Chapala, the largest freshwater lake in Mexico, which supports diverse aquatic life and provides water for agriculture and human consumption. Proper treatment at plants like La Purísima helps protect downstream water quality and ecosystem health.

The plant's treated effluent enters a local tributary within the Lerma River basin, which flows into Lake Chapala. This watershed is ecologically significant, supporting a variety of fish species and migratory birds. The Lerma-Chapala basin faces pressures from agricultural runoff and urban development, making effective wastewater treatment crucial for maintaining water quality and biodiversity in the region.