Grace S_T Facility Wastewater Treatment Plant, Caribou County, Idaho

Grace S_T Facility is a municipal wastewater treatment plant located in Caribou County, Idaho, United States. The plant serves a small community of approximately 915 residents, providing secondary treatment to meet local water quality standards. As a secondary treatment facility, Grace S_T Facility employs biological processes to remove organic matter and suspended solids. The plant has a designed capacity of 1097.77 megaliters and currently discharges 227.13 megaliters of treated wastewater annually. Under the U.S. Clean Water Act, such facilities operate under National Pollutant Discharge Elimination System (NPDES) permits issued by the Idaho Department of Environmental Quality, which set effluent limits to protect receiving waters. The treated effluent from Grace S_T Facility is discharged into a local water body within the Bear River Basin, which ultimately flows into the Great Salt Lake. The plant plays a key role in protecting downstream aquatic ecosystems and maintaining water quality in this semi-arid region of the western United States.

Grace S_T Facility discharges into a tributary of the Bear River, which flows through Idaho and Utah before terminating in the Great Salt Lake. This watershed supports diverse aquatic life and is an important migratory corridor for birds. The plant's secondary treatment helps reduce nutrient loading and protect downstream water quality in this sensitive basin.