Presa El Niágara Wastewater Treatment Plant, El Niágara, Aguascalientes, Mexico

Presa El Niágara is a wastewater treatment plant located in the community of El Niágara, within the municipality of Aguascalientes, Mexico. The plant serves a population of around 1,643 people, classifying it as a small-scale facility. It operates under Mexico's national water regulations, which require secondary treatment for municipal wastewater to protect public health and the environment. The plant employs secondary treatment processes to reduce organic matter and suspended solids. It has a designed capacity of 51.84 cubic meters per day and currently discharges 155.52 cubic meters per day, indicating operation above its nominal capacity. The plant is situated inland, more than 10 kilometers from the coast, and its treated effluent likely flows into local watercourses that drain into the Lerma-Santiago basin, eventually reaching the Pacific Ocean. The plant plays a key role in protecting local water quality in the Aguascalientes region, an area with semi-arid climate where water resources are scarce. By treating wastewater to secondary standards, it helps reduce pollution loads in rivers and supports downstream agricultural and ecological uses.

The plant's treated effluent likely discharges into local streams that are part of the Lerma-Santiago basin, which drains into the Pacific Ocean via the Rio Grande de Santiago. This watershed supports diverse aquatic life and is important for irrigation in the region. The semi-arid climate makes water quality management critical for maintaining ecosystem health and water availability for downstream communities.