City of Farmington Wastewater Treatment Plant, Farmington, New Mexico

The City of Farmington wastewater treatment plant is a municipal facility located in Farmington, New Mexico, serving a population of about 55,943 residents. Situated in the arid Southwest, the plant plays a critical role in managing wastewater for this growing community in San Juan County. As a US-based plant serving a medium-sized agglomeration, it operates under the Clean Water Act and is subject to National Pollutant Discharge Elimination System (NPDES) permitting. The US Environmental Protection Agency and the New Mexico Environment Department oversee compliance, requiring secondary treatment as a minimum standard for municipal plants of this scale. The plant's treated effluent is discharged into the local watershed, which ultimately drains into the San Juan River, a tributary of the Colorado River. This river system supports diverse aquatic life and provides water for agriculture, recreation, and downstream communities in the Colorado River Basin.

The plant discharges into the San Juan River watershed, which flows into the Colorado River and eventually reaches the Gulf of California. The arid climate of the Colorado Plateau makes water quality management critical for sustaining native fish species and riparian habitats. The San Juan River supports several sensitive species, including the Colorado pikeminnow and razorback sucker, which rely on clean water flows.