Byron Lagoon Wastewater Treatment Plant, Byron, Wyoming

Byron Lagoon is a wastewater treatment facility located in Byron, Big Horn County, Wyoming, United States. The plant serves a small population of approximately 593 residents, reflecting the rural character of the area. It operates as a lagoon-based secondary treatment system, a common approach for small communities in the region. The plant has a designed capacity of 1892.70 megaliters and currently discharges 302.83 megaliters of treated wastewater annually. As a secondary treatment facility, it meets the minimum requirements under the U.S. Clean Water Act for municipal wastewater treatment. The plant is regulated under the National Pollutant Discharge Elimination System (NPDES) permit program, which sets effluent limits to protect water quality. The treated effluent is discharged to a local waterway that ultimately drains into the Bighorn River basin. The Bighorn River flows through northern Wyoming and Montana before joining the Yellowstone River, a major tributary of the Missouri River. The plant's operations help protect downstream aquatic ecosystems and support the overall health of the Bighorn River watershed.

Byron Lagoon discharges into a local tributary of the Bighorn River, which flows northward through Wyoming and Montana. The Bighorn River supports diverse aquatic life, including trout species, and is an important resource for irrigation and recreation. The plant's secondary treatment helps reduce nutrient and organic loads, protecting downstream water quality in the Bighorn River basin.