Claustros del Rio Wastewater Treatment Plant, San Juan del Rio, Queretaro

Claustros del Rio is a wastewater treatment plant located in San Juan del Rio, Queretaro, Mexico. The facility serves a population of 1,187 and operates with secondary treatment, which is the standard level for municipal wastewater in Mexico under NOM-001-SEMARNAT-1996 regulations. The plant has a designed capacity of 432.00 cubic meters per day and currently discharges 112.32 cubic meters of treated effluent daily. The plant's secondary treatment process typically involves biological treatment to reduce organic matter and suspended solids. As a small-scale facility serving fewer than 2,500 people, it falls under Mexico's regulatory framework for rural and semi-urban wastewater systems. The plant's performance is subject to compliance with national discharge standards that set limits for biochemical oxygen demand, total suspended solids, and other parameters. The treated effluent from Claustros del Rio is discharged into the local watershed, which ultimately drains into the San Juan River, a tributary of the Moctezuma River in the Pánuco River basin. This basin flows into the Gulf of Mexico, supporting diverse aquatic ecosystems along its course. The plant plays a key role in protecting water quality in the region, particularly for downstream communities and agricultural users.

The plant discharges into the San Juan River, which flows into the Moctezuma River and then the Pánuco River, eventually reaching the Gulf of Mexico. The watershed supports agricultural activities and provides habitat for freshwater species. The region's semi-arid climate makes water quality management critical for maintaining ecological balance and supporting local water needs.