Overview
Apaseo El Alto wastewater treatment plant serves the city of Apaseo el Alto in Guanajuato, Mexico. It handles a population of approximately 33,771 and discharges into local water bodies.
The Apaseo El Alto wastewater treatment plant is located in the city of Apaseo el Alto, in the state of Guanajuato, Mexico. It serves a population of around 33,771 residents, placing it in the medium agglomeration category. The plant is situated inland, more than 50 km from the coast, and its operations are subject to Mexican environmental regulations. Under Mexico's national water law (Ley de Aguas Nacionales) and NOM-001-SEMARNAT standards, wastewater treatment plants of this scale are required to meet specific discharge limits for pollutants. The plant is expected to provide at least secondary treatment to comply with federal norms. The regulatory framework ensures that treated effluent meets quality standards before discharge. The plant's treated wastewater is discharged into local surface waters, which ultimately drain into the Lerma River basin. The Lerma River flows westward into Lake Chapala, Mexico's largest freshwater lake, and then into the Pacific Ocean via the Rio Grande de Santiago. This watershed supports diverse aquatic life and provides water for agriculture and communities downstream.
Environmental context
The plant's effluent enters the Lerma River basin, which is a critical water resource for central Mexico. The Lerma River flows into Lake Chapala, a vital freshwater lake that supports fisheries and biodiversity. Downstream, the Rio Grande de Santiago carries water to the Pacific Ocean. The region faces challenges from agricultural runoff and industrial pollution, making effective wastewater treatment essential for protecting aquatic ecosystems and downstream water quality.
Frequently asked questions
The plant is located at 306 Calle Ignacio Allende, Zona Centro Sur, Apaseo el Alto, Guanajuato, Mexico.
The treated effluent is discharged into local surface waters that flow into the Lerma River basin, eventually reaching Lake Chapala and the Pacific Ocean.
The plant helps protect the Lerma River and its downstream water bodies, including Lake Chapala and the Rio Grande de Santiago, by treating wastewater before discharge.
The plant operates under Mexico's Ley de Aguas Nacionales and NOM-001-SEMARNAT standards, which set discharge limits for pollutants to protect water quality.
For medium agglomerations of this size, Mexican regulations typically require secondary treatment to meet federal discharge standards, often using activated sludge or similar processes.
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