Shenango Twp STP
155 Campground Rd, West Middlesex, PA 16159 · Mercer County · Publicly Owned Treatment Works
- Average flow
- 0.43 MGD
- Design flow
- 0.51 MGD
- NPDES permit
- PA0103471
- Effective
- Permit expires
- September 2030
- Population served
- —
- CWNS 2022
Shenango Twp STP is a publicly owned wastewater treatment works in West Middlesex, Mercer County, Pennsylvania treating an average of 0.43 million gallons per day against a permitted design capacity of 0.51 MGD. It discharges under NPDES permit PA0103471 (effective), which expires in September 2030, with 24 recorded violations in the last three years.
Treatment technology
One treatment structure or unit process identified at Shenango Twp STP.
Available with a free Klarifi account
See the full treatment train at Shenango Twp STP: structures, unit processes and planned upgrades, with exact unit counts.
Compliance snapshot (last 3 years)
- Total violations
- 24
- Effluent violations
- 23
Based on NPDES Discharge Monitoring Reports. Full violation history, parameters and discharge data available in the Klarifi platform.
Key contacts
Decision-makers at Shenango Twp STP.
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Nearby wastewater treatment plants in Pennsylvania
Hermitage · 2 mi away
3.72 MGD
Farrell · 3 mi away
1.29 MGD
Pulaski · 4 mi away
0.0098 MGD
Pulaski · 4 mi away
0.17 MGD
Sharon · 5 mi away
4.89 MGD
New Castle · 7 mi away
0.02 MGD
Volant · 11 mi away
0.0088 MGD
Bessemer · 13 mi away
0.2 MGD
Shenango Twp STP: frequently asked questions
Sources and methodology
Flow, permit and violation figures come from the EPA's ICIS-NPDES discharge monitoring records. Population served comes from the Clean Watersheds Needs Survey 2022. Treatment structures are identified by Klarifi's review of aerial imagery, and capital improvement projects are extracted from published municipal budget documents. Violations are counted over the last three years of monitoring reports.
Data refreshed October 12, 2026; facility record last updated May 24, 2025.
Wastewater terms: POTW · MGD · NPDES permit · Inflow and infiltration · Centrate · Ozonation · all terms