EDGERTON LAGOON Wastewater Treatment Plant, Edgerton, Wyoming

EDGERTON LAGOON is a wastewater treatment facility located on South Kieffer Street in Edgerton, Natrona County, Wyoming. It serves a small population of 195 residents, reflecting the rural character of the area. The plant operates as a lagoon system, a common treatment approach for small communities in the western United States. The plant provides secondary treatment, which meets the minimum standard under the U.S. Clean Water Act for municipal wastewater facilities. With a designed capacity of 45.42 megaliters and an annual discharge volume of 37.85 megaliters, the plant operates below its capacity, indicating adequate headroom for current demand. As a small facility, it is subject to EPA National Pollutant Discharge Elimination System (NPDES) permitting, typically administered by the Wyoming Department of Environmental Quality. The treated effluent is discharged into the local watershed, which ultimately drains into the North Platte River basin. The North Platte River flows through central Wyoming and Nebraska, supporting agricultural irrigation, recreation, and aquatic habitats. The plant's location in a semi-arid region underscores the importance of responsible water management to protect downstream water quality.

The plant discharges into the North Platte River basin, a major tributary of the Platte River system that flows into the Missouri River and eventually the Mississippi River. The North Platte River supports diverse aquatic life, including native fish species such as the sauger and channel catfish, and provides critical habitat for migratory birds along the Central Flyway. The semi-arid climate of central Wyoming makes water quality management essential for maintaining ecological balance in this sensitive watershed.