Thompsontown STP
Thompsontown, PA · Juniata County · Publicly Owned Treatment Works
- Average flow
- 0.16 MGD
- Design flow
- 0.25 MGD
- NPDES permit
- PA0111422
- Expired
- Permit expires
- March 2026
- Population served
- —
- CWNS 2022
Thompsontown STP is a publicly owned wastewater treatment works in Thompsontown, Juniata County, Pennsylvania treating an average of 0.16 million gallons per day against a permitted design capacity of 0.25 MGD. Treatment on site includes aerated lagoons. It discharges under NPDES permit PA0111422 (expired), which expires in March 2026, with 8 recorded violations in the last three years.
Treatment technology
Treatment structures identified at this facility. Exact unit counts are available in Klarifi.
Aerated lagoons
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Compliance snapshot (last 3 years)
- Total violations
- 8
- Effluent violations
- 8
Based on NPDES Discharge Monitoring Reports. Full violation history, parameters and discharge data available in the Klarifi platform.
Key contacts
1 verified contact for Thompsontown STP, with validated emails and direct phone numbers.
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Names, validated emails and direct phone numbers for decision-makers at Thompsontown STP, plus the full compliance history and discharge data.
Nearby wastewater treatment plants in Pennsylvania
East Salem · 4 mi away
0.005 MGD
Millerstown · 5 mi away
0.04 MGD
Mcalisterville · 5 mi away
0.04 MGD
Newport · 8 mi away
0.22 MGD
Port Royal · 8 mi away
0.05 MGD
Mifflin · 9 mi away
0.3 MGD
New Bloomfield · 10 mi away
0.08 MGD
Mcclure · 12 mi away
0.13 MGD
Thompsontown 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 November 28, 2025.