Garrett Boro STP - Secondary Wastewater Treatment in Summit Township, Pennsylvania

Garrett Boro STP is a municipal wastewater treatment facility located in Summit Township, Somerset County, Pennsylvania. The plant serves a small population of 448 residents and is situated in a rural area near the Great Allegheny Passage. It operates as part of the region's wastewater infrastructure, managing flows from the local community. The plant provides secondary treatment, which is the standard level required by the US Clean Water Act for municipal facilities. Its designed capacity is 264.98 thousand gallons per day, matching the current discharge volume. As a small-scale plant, it is subject to National Pollutant Discharge Elimination System (NPDES) permitting, typically administered by the Pennsylvania Department of Environmental Protection. The treated effluent is discharged into a local waterway within the Ohio River basin. The plant's operations help protect downstream water quality in the Allegheny River system, which ultimately drains to the Mississippi River and the Gulf of Mexico. The surrounding area includes forested hills and agricultural land, making the plant important for maintaining local stream health.

The plant discharges into a tributary of the Casselman River, which flows into the Youghiogheny River, a major tributary of the Monongahela River. This system is part of the Ohio River watershed, draining ultimately to the Mississippi River and the Gulf of Mexico. The local streams support diverse aquatic life, including native fish species, and the plant's secondary treatment helps reduce nutrient and organic loads to protect downstream ecosystems.