GUERNSEY LAGOON Wastewater Treatment Plant, Platte County, Wyoming

GUERNSEY LAGOON is a municipal wastewater treatment plant located in Platte County, Wyoming, serving a population of approximately 3,102. The facility operates under the regulatory framework of the United States Clean Water Act, which requires secondary treatment for municipal wastewater discharges. As a small-scale plant, it is subject to National Pollutant Discharge Elimination System (NPDES) permits issued by the Wyoming Department of Environmental Quality, ensuring compliance with water quality standards. The plant provides secondary treatment, a standard biological process that removes organic matter and suspended solids. With a designed capacity of 2,384.80 volume units and an actual discharge volume of 908.50, the facility operates well within its capacity. The treatment process typically involves lagoons or activated sludge systems common in rural Wyoming. The treated effluent is discharged into local water bodies that ultimately drain into the North Platte River basin, a tributary of the Platte River system. This watershed supports agricultural irrigation and provides habitat for aquatic species. The plant's inland location reduces direct marine impact, but its discharge contributes to the overall water quality of the regional river network.

The plant discharges into the North Platte River watershed, which flows through Wyoming and Nebraska before joining the Platte River and eventually the Missouri River. This basin supports diverse aquatic life and is an important resource for irrigation and recreation. The surrounding semi-arid climate means that maintaining water quality in these rivers is critical for both ecological health and human use.