GLENROCK LAGOON Wastewater Treatment Plant, Glenrock, Wyoming

GLENROCK LAGOON is a municipal wastewater treatment facility serving the town of Glenrock in Converse County, Wyoming. With a population served of about 2,576, it is classified as a small agglomeration under US regulatory standards. The plant is situated in a semi-arid region of the Rocky Mountain foothills. As a lagoon-based system, the plant provides natural treatment through settling and biological processes. Under the US Clean Water Act, facilities of this scale are typically regulated through National Pollutant Discharge Elimination System (NPDES) permits issued by the Wyoming Department of Environmental Quality. These permits set effluent limits to protect receiving water quality. The treated effluent from the lagoon likely discharges to a local watercourse that drains into the North Platte River system. The North Platte River flows through Wyoming and Nebraska, eventually joining the Platte River and contributing to the Missouri River watershed. This drainage basin supports agricultural irrigation and aquatic habitats in the region.

The plant's discharge enters the North Platte River watershed, which flows through semi-arid plains and agricultural lands. The North Platte River supports diverse fish species including trout and provides critical habitat for migratory birds along the Central Flyway. Downstream, the river contributes to the Platte River system, which is ecologically significant for sandhill crane migrations and other waterfowl. The semi-arid climate means water quality management is important for maintaining stream flows and ecosystem health.