La Presa Wastewater Treatment Plant, Ixtlahuacán, Colima, Mexico

La Presa wastewater treatment plant is located in the small community of La Presa (Barranca del Rebozo) within the municipality of Ixtlahuacán, Colima, Mexico. The plant serves a population of approximately 1,095 residents, providing essential wastewater treatment for this rural area. The plant operates with secondary treatment, which is appropriate for its small scale. With a designed capacity of 172.80 m³/day and a current discharge volume of 103.68 m³/day, the facility has capacity to accommodate future growth. In Mexico, wastewater treatment plants are regulated under the National Water Law (Ley de Aguas Nacionales) and NOM-001-SEMARNAT-1996, which sets discharge standards for pollutants. The treated effluent from La Presa plant ultimately drains into the Pacific Ocean via local waterways. The region's hydrology is influenced by the nearby Sierra Madre del Sur, and the plant's operations help protect downstream aquatic ecosystems and coastal water quality in the Colima coastal zone.

The La Presa plant discharges treated wastewater into local streams that flow toward the Pacific Ocean, contributing to the health of the coastal watershed. The region supports diverse aquatic life and is important for migratory species. Proper treatment helps maintain water quality in the receiving water bodies, which are ecologically sensitive areas along the Colima coast.