Calvillo Wastewater Treatment Plant, Aguascalientes, Mexico

The Calvillo wastewater treatment plant is located in the city of Calvillo, within the state of Aguascalientes, Mexico. Serving a population of around 48,653, the plant is a key component of the local municipal wastewater infrastructure, managing domestic sewage from this urban area. As a Mexican treatment facility, the plant operates under the national water regulations enforced by CONAGUA (Comisión Nacional del Agua). For a medium-sized agglomeration of this scale, secondary treatment is typically required to meet discharge standards. The regulatory framework ensures that treated effluent meets quality criteria for safe discharge. The treated wastewater from Calvillo is discharged into the local hydrological system, which ultimately drains into the Pacific Ocean via the Río Santiago-Lerma basin. This watershed supports agricultural activities and provides water for downstream communities. The plant plays a vital role in protecting water quality in this region, reducing pollutant loads before discharge.

The Calvillo plant discharges into the Río Santiago-Lerma basin, which flows through central Mexico and eventually reaches the Pacific Ocean. This watershed supports diverse aquatic life and is important for irrigation and drinking water supply. The plant's operation helps maintain water quality in this ecologically sensitive basin, preventing nutrient enrichment and protecting downstream habitats.