Manderson WWTP - Secondary Wastewater Treatment in Manderson, Wyoming

Manderson WWTP is a municipal wastewater treatment facility located in the Town of Manderson, Big Horn County, Wyoming. It serves a small population of 114 residents, reflecting the rural character of the area. The plant is situated in the Bighorn Basin region, which is part of the larger Missouri River watershed. The plant provides secondary treatment, which is the standard level required under the U.S. Clean Water Act for municipal wastewater facilities. Secondary treatment typically involves biological processes to remove organic matter and suspended solids. The plant has a designed capacity of 75.71 cubic meters per day and currently discharges an average of 37.85 cubic meters per day, indicating it operates well below its capacity. Treated effluent from the plant is discharged into a local water body that ultimately drains into the Bighorn River, a tributary of the Yellowstone River, which flows into the Missouri River and eventually the Gulf of Mexico. The plant plays a key role in protecting local water quality in the semi-arid Bighorn Basin, where water resources are critical for agriculture and wildlife.

The plant discharges into a local watercourse that flows into the Bighorn River, part of the Missouri River basin. The Bighorn River supports diverse aquatic life, including native fish species such as the Yellowstone cutthroat trout. The semi-arid climate of the Bighorn Basin makes water quality management essential for downstream agricultural irrigation and ecosystem health.