Armagh Sys STP
Armagh, PA · Indiana County · Publicly Owned Treatment Works
- Average flow
- 0.03 MGD
- Design flow
- 0.11 MGD
- NPDES permit
- PA0218651
- Effective
- Permit expires
- April 2030
- Population served
- —
- CWNS 2022
Armagh Sys STP is a publicly owned wastewater treatment works in Armagh, Indiana County, Pennsylvania treating an average of 0.03 million gallons per day against a permitted design capacity of 0.11 MGD. It discharges under NPDES permit PA0218651 (effective), which expires in April 2030, with 3 recorded violations in the last three years.
Treatment technology
Treatment structures identified at this facility. Exact unit counts are available in Klarifi.
Treatment structure data not yet analyzed for this facility.
Compliance snapshot (last 3 years)
- Total violations
- 3
- Effluent violations
- 2
Based on NPDES Discharge Monitoring Reports. Full violation history, parameters and discharge data available in the Klarifi platform.
Key contacts
Decision-makers at Armagh Sys STP.
No verified contacts on file yet
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Nearby wastewater treatment plants in Pennsylvania
Seward · 3 mi away
0.008 MGD
Seward · 4 mi away
0.07 MGD
Vintondale · 7 mi away
0.06 MGD
Robinson · 8 mi away
0.04 MGD
Homer City · 8 mi away
0.27 MGD
Johnstown · 8 mi away
2.3 MGD
Blacklick · 8 mi away
0.06 MGD
Indiana · 10 mi away
3.43 MGD
Armagh Sys 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 September 11, 2026; facility record last updated October 2, 2025.