Fairmont WWTP - Municipal Wastewater Treatment in Fairmont, West Virginia

Fairmont WWTP is a municipal wastewater treatment facility located in Fairmont, Marion County, West Virginia, United States. The plant serves an estimated population of 36,533, placing it in the medium-agglomeration category for US wastewater infrastructure. As a US facility, Fairmont WWTP operates under the Clean Water Act and is subject to National Pollutant Discharge Elimination System (NPDES) permits issued by the West Virginia Department of Environmental Protection. For plants serving populations of this scale, secondary treatment is the minimum standard, with additional nutrient removal requirements in sensitive watersheds. The plant discharges into the Monongahela River basin, which flows northward to join the Allegheny River at Pittsburgh, forming the Ohio River. The Ohio River then drains to the Mississippi River and ultimately the Gulf of Mexico. The Monongahela River supports diverse aquatic life and is an important water resource for the region.

Fairmont WWTP discharges into the Monongahela River watershed, a tributary of the Ohio River system. The Monongahela River flows through West Virginia and Pennsylvania, eventually joining the Mississippi River drainage to the Gulf of Mexico. The river supports a variety of fish species and is used for recreation and drinking water supply downstream. The plant's location inland, over 50 km from the coast, reduces direct marine impact but contributes to nutrient loading in the Mississippi River basin, which has implications for the Gulf of Mexico hypoxic zone.