GALLUP STP Wastewater Treatment Plant, Gallup, New Mexico

GALLUP STP is a municipal wastewater treatment plant located in Gallup, New Mexico, serving a population of around 21,734. The facility is situated in McKinley County, within the arid climate of the Southwestern United States. As a medium-sized agglomeration, the plant plays a key role in managing local wastewater and protecting public health. Under the U.S. Clean Water Act, municipal wastewater treatment plants are required to meet secondary treatment standards, which typically involve biological processes to reduce organic matter and suspended solids. Facilities serving populations of this scale in the U.S. generally employ activated sludge or similar biological treatment systems to comply with National Pollutant Discharge Elimination System (NPDES) permits. The plant's treated effluent is discharged into the local watershed, which ultimately drains into the Puerco River, a tributary of the Little Colorado River. The Little Colorado River flows into the Colorado River, a major waterway in the arid Southwest that supports diverse aquatic life and provides water for agriculture, recreation, and municipal use downstream. The plant's operations are critical for maintaining water quality in this sensitive desert ecosystem.

GALLUP STP discharges into the Puerco River, which flows into the Little Colorado River and then the Colorado River. The Colorado River basin is a vital water source for the Southwestern U.S., supporting endangered fish species such as the humpback chub and razorback sucker. The arid climate and high evaporation rates make water quality management particularly important in this region.