Big Stone Gap WWTP and Collection Sys - Virginia Wastewater Treatment Plant

Big Stone Gap WWTP and Collection Sys is a municipal wastewater treatment facility serving the town of Big Stone Gap, located in Wise County, Virginia. The plant serves a population of approximately 7,381 residents, placing it in the small-to-medium agglomeration category for US inland communities. As a US facility, the plant operates under the Clean Water Act and is subject to National Pollutant Discharge Elimination System (NPDES) permits issued by the Virginia Department of Environmental Quality. For communities of this scale, secondary treatment is the standard requirement, with additional nutrient removal potentially needed depending on the receiving water body's sensitivity. The plant discharges into local waterways that ultimately drain into the Tennessee River system, part of the larger Mississippi River basin. The surrounding Appalachian region features sensitive aquatic ecosystems, including headwater streams that support diverse fish and macroinvertebrate communities. Proper treatment is essential to protect downstream water quality in this ecologically significant watershed.

The plant's discharge enters local streams within the Tennessee River watershed, which flows into the Ohio River and eventually the Mississippi River. The Appalachian region's steep terrain and coal mining history create unique water quality challenges, including acid mine drainage and sediment runoff. The receiving waters support diverse aquatic life, including several species of darters and minnows, making effective wastewater treatment critical for maintaining ecological health.