Pajacuarán Wastewater Treatment Plant, Pajacuarán, Michoacán, Mexico

The Pajacuarán wastewater treatment plant is a municipal facility located in the town of Pajacuarán, Michoacán, Mexico. It serves a population of about 12,379 residents, classifying it as a small to medium agglomeration under Mexican wastewater regulations. The plant is situated near the coast, within 50 km of the Pacific Ocean, which influences its environmental considerations. Under Mexican law, wastewater treatment plants are regulated by the National Water Commission (CONAGUA) and must comply with official standards NOM-001-SEMARNAT-1996 and NOM-002-SEMARNAT-1996, which set limits for pollutants in discharges to national waters. For a plant serving this population size, secondary treatment is typically required to meet these standards. It operates within this regulatory framework. The plant's treated effluent is discharged into local water bodies that eventually drain into the Pacific Ocean. The region's hydrology includes the Lerma River basin, which flows westward to Lake Chapala and then to the Pacific. The plant plays a role in protecting downstream water quality and aquatic ecosystems, particularly in a region with agricultural and industrial activities.

The plant discharges into local waterways that are part of the Lerma River basin, which flows into Lake Chapala, Mexico's largest freshwater lake, and eventually reaches the Pacific Ocean. This watershed supports diverse aquatic life and is important for regional biodiversity. The plant's operations help mitigate pollution impacts on these sensitive ecosystems, particularly given the proximity to the coast and potential for nutrient enrichment in coastal waters.