Puerta del Muerto Wastewater Treatment Plant, Aguascalientes, Mexico

Puerta del Muerto is a wastewater treatment plant located in the community of Puerta del Muerto, within the municipality of Rincón de Romos, Aguascalientes, Mexico. The plant serves a small population of 1,187 residents, reflecting its role in managing domestic wastewater for a rural or peri-urban area. Its location in the semi-arid highlands of central Mexico influences water management practices, where treated effluent is a valuable resource. The plant employs secondary treatment, a standard biological process that removes organic matter and suspended solids. With a designed capacity of 129.60 m³/day and an actual discharge volume of 112.32 m³/day, the facility operates at approximately 86.7% capacity, indicating consistent utilization. In Mexico, wastewater treatment plants are regulated under the National Water Law (Ley de Aguas Nacionales) and NOM-001-SEMARNAT-1996, which sets discharge limits for pollutants. For small communities, secondary treatment is typical to meet these standards. The treated effluent from Puerta del Muerto likely discharges into a local arroyo or stream that drains into the Aguascalientes River basin, ultimately flowing into the Lerma-Santiago-Pacífico hydrological system. This water body supports agricultural irrigation and local ecosystems in a region characterized by seasonal rainfall and water scarcity. Proper treatment helps protect downstream water quality and public health.

The plant's discharge enters the Aguascalientes River basin, part of the larger Lerma-Santiago-Pacífico watershed that drains into the Pacific Ocean. This region experiences a semi-arid climate with seasonal rainfall, making water resources critical for agriculture and local biodiversity. The treated effluent contributes to base flow in local streams, supporting aquatic habitats and irrigation. Effective secondary treatment reduces organic load and pathogens, mitigating eutrophication risks and safeguarding downstream communities.