Coroneo Wastewater Treatment Plant, Guanajuato, Mexico

Coroneo wastewater treatment plant is located in the town of Coroneo, within the state of Guanajuato, Mexico. The facility serves a population of about 9,755 residents, making it a small-scale municipal treatment plant. It is situated inland, far from coastal areas, and its operations are subject to Mexican environmental and water quality standards. As a small agglomeration, the plant is expected to provide at least secondary treatment under Mexican regulations (NOM-001-SEMARNAT-1996), which sets discharge limits for pollutants. The plant's scale suggests it likely employs conventional biological treatment methods common for communities of this size in Mexico. The plant discharges treated wastewater into local water bodies that ultimately drain into the Lerma River basin, a major hydrological system in central Mexico. The Lerma River flows into Lake Chapala, Mexico's largest freshwater lake, which supports diverse aquatic life and provides water for agriculture and human consumption. Proper treatment at Coroneo helps protect downstream water quality in this ecologically and economically important watershed.

The treated effluent from Coroneo likely enters local streams that feed into the Lerma River, which flows into Lake Chapala, Mexico's largest freshwater lake. Lake Chapala supports a rich ecosystem of fish and migratory birds and is a critical water source for the Guadalajara metropolitan area. The Lerma-Chapala basin faces pressures from agricultural runoff and urban wastewater, making effective treatment at plants like Coroneo essential for maintaining water quality and ecological balance.