Eastern Armstrong Co STP - Advanced Wastewater Treatment in Plumcreek Township, Pennsylvania

Eastern Armstrong Co STP is a municipal wastewater treatment facility located in Plumcreek Township, Armstrong County, Pennsylvania. The plant serves a small population of 1,492 residents, providing advanced treatment to protect local water quality. As an advanced treatment plant, it goes beyond secondary treatment to remove additional nutrients and contaminants. The plant has a designed capacity of 757.08 cubic meters per day, with current discharge volume matching that capacity. Under the US Clean Water Act, such facilities operate under National Pollutant Discharge Elimination System (NPDES) permits issued by the Pennsylvania Department of Environmental Protection, ensuring compliance with effluent limits. The plant discharges treated effluent into local waterways within the Allegheny River watershed, which ultimately drains to the Ohio River and then the Mississippi River. The advanced treatment helps protect downstream aquatic ecosystems and supports water quality in the region's streams and rivers.

The plant discharges into tributaries of the Allegheny River, which flows into the Ohio River and then the Mississippi River, eventually reaching the Gulf of Mexico. The local watershed supports diverse aquatic life and is part of a larger river system that provides habitat for fish and other species. Advanced treatment helps reduce nutrient loading, which is critical for preventing eutrophication in downstream waters.