ARCO S_T FACILITY Wastewater Treatment Plant, Arco, Idaho

The ARCO S_T FACILITY is a municipal wastewater treatment plant located in Arco, Butte County, Idaho, United States. It serves a small population of around 995 residents, reflecting the rural character of the area. The plant is situated at 3100 North, Arco, and operates under the regulatory framework of the US Clean Water Act. As a secondary treatment facility, the plant provides biological treatment to remove organic matter and suspended solids. The designed capacity is 1,022.06 volume units, with a current discharge volume of 757.08 volume units, indicating operational headroom. Secondary treatment is standard for small communities under US EPA guidelines. The plant's treated effluent is discharged into the local watershed, which ultimately drains into the Snake River basin. This region is part of the larger Columbia River drainage system, supporting diverse aquatic life and agricultural water use. The plant plays a key role in protecting local water quality in this semi-arid, high-desert environment.

The ARCO S_T FACILITY discharges into the Snake River basin, a major tributary of the Columbia River. The downstream environment includes the Snake River Plain, an ecologically sensitive area that supports migratory fish species and irrigated agriculture. The plant's secondary treatment helps reduce nutrient and organic loads, protecting water quality in this arid region where water resources are critical for both ecosystems and human use.