Constructed in 1959 the Waste Water Treatment Plant (WWTP) is located on the Allegheny River on the west end of Oil City and treats domestic and commercial wastewater from the city and surrounding areas including Cranberry and Cornplanter Township. The WWTP is responsible for treating all waste streams conveyed to it and is liable for the disposal of all subsequently stabilized byproducts. The final effluent from the plant is discharged into the Allegheny River. Questions can be directed to Director Jeff Wenner at (814) 678-3039.You may also contact the department by filling out the form below.
The plant has a staff of six licensed operators. Operators are responsible for the operation and maintenance of the WWTP as well as work in the field throughout the city for sewage blocks, breaks, or concerns. Unplugging lines, repairing and replacing lines, and preventative proactive maintenance are regular occurrences for the operators.
The Trickling Filter style plant encompasses 5.3 acres of land and has designed an average influent flow of 4 million gallons per day. The max storm influent flow is 8 MGD and the sanitary max influent flow is l11 MGD — allowing the WWTP to receive a total rating of 19 MGD.
The plant adheres to all National Pollutant Discharge Elimination System (NPDES) regulations and meets all guidelines set forth by the Pennsylvania Department of Environmental Protection (DEP).
A total of five offsite wastewater pump stations through the city are checked and maintained daily.
On-site laboratory testing and sampling are performed daily to verify proper treatment and regulations are met.
A Combined System: Sanitary and Storm
The WWTP received and treats both sanitary and storm flow into the plant. Approximately seventy-three miles of pipe ranging anywhere from 4 to 48 inches make up the city's storm and sanitary infrastructure.
Sewage Sludge Process and Disposal
Three anaerobic digestors hold sewage sludge from the primary and secondary clarifiers to decompose organic waste. Methane is a byproduct created during this decomposition and is recycled or reused for heating buildings in the plant. Sludge from the digesters is run through a dewatering filter press before being hauled away to a landfill.
Constructions and Projects
2008: Phase 1 — Inline channel grinders and grit removal system at WWTP
2009: Phase 2 — Combined Sewer Overflow (CSO) sites constructed throughout the city
2010: Phase 3 — CSO communications infrastructure
2016: Oliver Manor pump station renovation
2020 - Present: $6.4 million North Side Pump Station renovation project