San Jeronimo Wastewater Treatment Plant, San Martín Hidalgo, Jalisco

San Jeronimo is a municipal wastewater treatment plant located in San Jerónimo, within the municipality of San Martín Hidalgo in the Valles region of Jalisco, Mexico. The facility serves a small population of 913 residents, reflecting its role in a rural or semi-urban community. The plant provides secondary treatment, which is the standard biological process for removing organic matter and suspended solids. With a designed capacity of 86.40 volume units and a discharge volume matching that figure, the plant operates at full capacity. Mexican regulations under NOM-001-SEMARNAT-1996 set discharge limits for wastewater, and plants of this scale are expected to comply with those standards. The treated effluent is discharged into local water bodies that eventually drain into the Pacific Ocean via the Ameca River or other regional hydrologic systems. The surrounding area is part of the Lerma-Santiago-Pacifico basin, supporting agricultural activities and local ecosystems. Proper treatment helps protect downstream water quality and aquatic life.

The plant's discharge enters local streams that flow into the Ameca River basin, which drains into the Pacific Ocean. This watershed supports agricultural irrigation and freshwater habitats. Secondary treatment reduces organic pollutants, safeguarding downstream water quality for communities and ecosystems in the Valles region.