Olean C WWTP - Municipal Wastewater Treatment in Olean, New York

Olean C WWTP is a municipal wastewater treatment facility located in Olean, Cattaraugus County, New York. The plant serves a population of around 25,115 residents, classifying it as a medium-sized agglomeration under U.S. regulatory frameworks. As a publicly owned treatment works (POTW) in the United States, the plant operates under the Clean Water Act's National Pollutant Discharge Elimination System (NPDES) permit program. The New York State Department of Environmental Conservation (NYSDEC) typically issues permits for such facilities, setting effluent limits to protect water quality. The plant's treated effluent is discharged into a tributary of the Allegheny River, which flows southwest into Pennsylvania and eventually joins the Ohio River, a major tributary of the Mississippi River. This drainage basin supports diverse aquatic life and provides drinking water for downstream communities. The plant's operation helps maintain the ecological health of the Allegheny River watershed by reducing pollutant loads.

The plant discharges into the Allegheny River watershed, which flows through western New York and Pennsylvania before joining the Ohio River. This river system supports diverse fish populations, including smallmouth bass and walleye, and provides habitat for migratory birds. The watershed is also a source of drinking water for several communities downstream, making nutrient and pathogen control critical for public health and aquatic ecosystem integrity.