San Pablo Tolimán Wastewater Treatment Plant, Querétaro, Mexico

The San Pablo Tolimán wastewater treatment plant is located in the municipality of Tolimán, Querétaro, Mexico. It serves a small population of 1,543 residents, reflecting its role in a rural or semi-urban community. The plant operates under Mexico's national water regulations, which require secondary treatment for municipal wastewater to protect public health and the environment. The plant provides secondary treatment, a standard biological process that removes organic matter and suspended solids. With a designed capacity of 216.00 volume units and an actual discharge of 146.02 volume units, the facility operates below its maximum capacity, indicating room for future growth. As a small-scale plant, it is subject to oversight by Mexico's water authority, CONAGUA, which enforces discharge standards. The treated effluent is released into local watercourses that drain into the Moctezuma River basin, part of the larger Pánuco River system flowing to the Gulf of Mexico. This downstream connection underscores the plant's role in protecting regional water quality and aquatic habitats.

The plant discharges into local streams that feed the Moctezuma River, a tributary of the Pánuco River, which ultimately reaches the Gulf of Mexico. The watershed supports diverse aquatic life and provides water for agriculture and communities downstream. Secondary treatment helps reduce nutrient and organic pollution, safeguarding the ecological health of this semi-arid region's water bodies.