Monument SD Wastewater Treatment Plant, Las Animas County, Colorado

Monument SD is a wastewater treatment facility located in Las Animas County, Colorado, serving a small population of approximately 1,750 residents. The plant is situated in a rural, inland area of the state, far from coastal influences. The plant employs advanced treatment processes, which go beyond secondary treatment to remove nutrients and other pollutants. With a designed capacity of 378.54 cubic meters per day and a similar discharge volume, the facility operates at full capacity. As a U.S. plant, it is subject to the Clean Water Act and likely operates under an EPA NPDES permit issued by the Colorado Department of Public Health and Environment, which sets effluent limits to protect water quality. The treated effluent is discharged into a local water body, likely a tributary of the Arkansas River or the Purgatoire River, which eventually flows into the Mississippi River system and the Gulf of Mexico. The plant plays a key role in protecting local streams and groundwater in the semi-arid region of southeastern Colorado.

The plant discharges into a local watercourse within the Arkansas River basin, which drains into the Mississippi River and ultimately the Gulf of Mexico. The surrounding area is characterized by semi-arid terrain and supports diverse aquatic life. The advanced treatment helps reduce nutrient loading, which is critical for preventing downstream eutrophication in the Gulf of Mexico's hypoxic zone.