OSAGE LAGOON Wastewater Treatment Plant, Osage, Wyoming

OSAGE LAGOON is a wastewater treatment facility located in Osage, Weston County, Wyoming, United States. The plant serves a small population of 208 residents, providing secondary treatment for municipal wastewater. As a lagoon-based system, it is typical for small communities in rural areas of the western United States. The plant operates under the regulatory framework of the U.S. Clean Water Act, which requires secondary treatment for municipal wastewater discharges. With a designed capacity of 56.78 million gallons and an annual discharge volume of 37.85 million gallons, the facility operates below its design capacity. The treatment process is secondary, which is the standard for small agglomerations in the United States. The treated effluent is discharged into a local water body, contributing to the watershed of the Cheyenne River basin, which ultimately drains into the Missouri River and then the Mississippi River system. The plant plays a role in protecting local water quality in the semi-arid region of eastern Wyoming, supporting downstream aquatic ecosystems and agricultural water uses.

The plant discharges into a local water body within the Cheyenne River basin, which flows into the Missouri River and eventually the Mississippi River. The receiving waters support diverse aquatic life and are important for regional agriculture and recreation. The semi-arid climate of eastern Wyoming makes water quality management critical for maintaining ecosystem health and water availability.