Arroyo Charcas Wastewater Treatment Plant, Doctor Mora, Guanajuato, Mexico

The Arroyo Charcas wastewater treatment plant is located in Doctor Mora, a town in the state of Guanajuato, Mexico. The facility serves a population of around 11,865 residents, making it a medium-sized agglomeration under Mexican wastewater regulations. As an inland plant, it plays a key role in managing local wastewater and protecting the region's water resources. Mexican wastewater treatment plants of this scale typically employ secondary treatment technologies such as activated sludge or stabilization ponds. The plant operates under Mexico's national water quality standards (NOM-001-SEMARNAT-1996), which set discharge limits for pollutants. These regulations ensure that treated effluent meets environmental requirements before release. The plant's treated effluent likely discharges into a local watercourse that feeds into the Lerma River basin, which ultimately drains into Lake Chapala, Mexico's largest freshwater lake. This watershed supports diverse aquatic life and provides water for agriculture and human consumption. Proper treatment at Arroyo Charcas helps reduce nutrient and pathogen loads, protecting downstream ecosystems and communities.

The Arroyo Charcas plant is situated in the Lerma River basin, which flows into Lake Chapala, the largest freshwater lake in Mexico. This watershed supports a variety of aquatic species and provides critical water resources for irrigation and drinking water. The region's semi-arid climate makes water quality management particularly important, as the river and lake are sensitive to nutrient pollution from untreated wastewater. Effective treatment at this plant helps maintain the ecological health of the downstream water bodies.