Cerro Gordo Wastewater Treatment Plant, Durango, Mexico

Cerro Gordo is a wastewater treatment plant located in the municipality of Canatlán, Durango, Mexico. It serves a small community of approximately 475 people, reflecting its role in rural wastewater management. The plant operates with secondary treatment, which is typical for small agglomerations in Mexico under national water regulations. The plant's designed capacity is 105.41 volume units, and it currently discharges 44.93 volume units, indicating it operates below its full capacity. As a secondary treatment facility, it provides biological treatment to reduce organic matter and suspended solids before discharge. Mexican wastewater standards (NOM-001-SEMARNAT) set discharge limits for such plants to protect water quality. The treated effluent is likely discharged into a local watercourse within the Nazas-Aguanaval basin, which drains into the Laguna de Mayrán or the Nazas River system. This region is semi-arid, and water resources are critical for agriculture and local ecosystems. The plant helps protect downstream water quality in this sensitive environment.

The plant discharges into the Nazas-Aguanaval basin, which flows through the semi-arid Durango region. The Nazas River is a vital water source for irrigation and supports riparian habitats. Downstream, the basin drains into the Laguna de Mayrán, an endorheic lagoon that provides important wetland habitat for migratory birds and local wildlife. Protecting water quality in this basin is essential for maintaining ecological balance and supporting agricultural livelihoods.