Firth S T Facility Wastewater Treatment Plant, Firth, Idaho

The Firth S T Facility is a municipal wastewater treatment plant located in Firth, Idaho, a small community in Bingham County. The plant serves a population of approximately 871 residents, reflecting its role in managing domestic wastewater for this rural area. As a secondary treatment facility, the plant provides biological treatment to remove organic matter and suspended solids, meeting the standard requirements under the U.S. Clean Water Act. The plant's designed capacity is 302.83 million gallons per year, with an actual discharge volume of 264.98 million gallons per year, indicating operational headroom. The treated effluent is discharged into a local waterway, contributing to the Snake River basin, which ultimately drains to the Columbia River and the Pacific Ocean. The plant's operations help protect downstream water quality in this agriculturally important region of southeastern Idaho.

The Firth S T Facility discharges into a tributary of the Snake River, which flows through the arid high desert of southeastern Idaho. The Snake River is a major tributary of the Columbia River, supporting irrigation, recreation, and aquatic life. Downstream, the river passes through Hells Canyon and eventually reaches the Pacific Ocean. The plant's secondary treatment helps reduce nutrient and organic loading, protecting the river's ecological health in a region where agriculture and water quality are closely linked.