MCCANDLESS TWP AandB STP - Pittsburgh, Pennsylvania Wastewater Treatment Plant

MCCANDLESS TWP AandB STP is a wastewater treatment plant located in Pittsburgh, Allegheny County, Pennsylvania, serving a population of approximately 2,090 residents. The plant is part of the municipal infrastructure managed by local authorities and operates under the regulatory framework of the United States Clean Water Act. As a small-scale facility serving fewer than 10,000 people, the plant is subject to EPA National Pollutant Discharge Elimination System (NPDES) permit requirements, which set effluent limits based on secondary treatment standards. The treatment process typically involves biological treatment to reduce organic pollutants and suspended solids before discharge. The plant's treated effluent is discharged into local streams that flow into the Allegheny River, a major tributary of the Ohio River. The Allegheny River supports diverse aquatic life and provides drinking water for downstream communities. The plant's operation helps protect water quality in this ecologically important watershed.

The plant discharges into the Allegheny River basin, which drains into the Ohio River and ultimately the Mississippi River and Gulf of Mexico. The Allegheny River supports a variety of fish species and is used for recreation and drinking water. The plant's location in an urbanized area means its effluent contributes to the overall nutrient and pollutant load in the watershed, requiring careful management to prevent eutrophication and protect downstream ecosystems.