Greenleaf STP - Secondary Wastewater Treatment Plant in Greenleaf, Idaho

Greenleaf STP is a municipal wastewater treatment facility located on Peckham Road in Greenleaf, Canyon County, Idaho. Serving a population of 846, this plant is part of the state's wastewater infrastructure for small communities. The plant operates under the U.S. Clean Water Act, which requires secondary treatment for municipal discharges to protect water quality. The plant has a designed capacity of 946.35 cubic meters per day and a current discharge volume of 454.25 cubic meters per day, indicating it operates well within its capacity. As a secondary treatment facility, it uses biological processes to reduce organic matter and suspended solids before discharge. The plant is regulated by the Idaho Department of Environmental Quality under the National Pollutant Discharge Elimination System (NPDES) permit program. The treated effluent from Greenleaf STP is discharged into local waterways that ultimately drain into the Snake River Basin, a major tributary of the Columbia River. This watershed supports diverse aquatic life and is important for irrigation and recreation in southern Idaho. The plant's operations help maintain water quality in this ecologically sensitive region.

Greenleaf STP discharges into the Boise River watershed, which flows into the Snake River and then the Columbia River before reaching the Pacific Ocean. The receiving waters support a variety of fish species, including salmon and trout, and are used for agricultural irrigation. The plant's secondary treatment helps reduce nutrient loading and protect downstream ecosystems.