Lewistown STP
Washington Avenue, Lewistown, PA 17044 · Mifflin County · Publicly Owned Treatment Works
- Average flow
- 1.18 MGD
- Design flow
- 2.82 MGD
- NPDES permit
- PA0026280
- Effective
- Permit expires
- June 2029
- Population served
- 9,195
- CWNS 2022
Lewistown STP is a publicly owned wastewater treatment works in Lewistown, Mifflin County, Pennsylvania treating an average of 1.18 million gallons per day against a permitted design capacity of 2.82 MGD, serving about 9,195 residents. It discharges under NPDES permit PA0026280 (effective), which expires in June 2029, with 1 recorded violation in the last three years.
Treatment technology
3 treatment structures and unit processes identified at Lewistown STP.
Available with a free Klarifi account
See the full treatment train at Lewistown STP: structures, unit processes and planned upgrades, with exact unit counts.
Compliance snapshot (last 3 years)
- Total violations
- 1
- Effluent violations
- 0
Based on NPDES Discharge Monitoring Reports. Full violation history, parameters and discharge data available in the Klarifi platform.
Key contacts
2 verified contacts for Lewistown STP, with validated emails and direct phone numbers.
Unlock 2 verified contacts
Names, validated emails and direct phone numbers for decision-makers at Lewistown STP, plus the full compliance history and discharge data.
Nearby wastewater treatment plants in Pennsylvania
Reedsville · 5 mi away
0.39 MGD
Lewistown · 6 mi away
0.19 MGD
Belleville · 8 mi away
0.13 MGD
Mcveytown · 8 mi away
0.04 MGD
Mifflin · 9 mi away
0.35 MGD
Port Royal · 10 mi away
0.07 MGD
Mcveytown · 11 mi away
0.04 MGD
East Waterford · 15 mi away
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Lewistown 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 March 1, 2025.
Wastewater terms: POTW · MGD · NPDES permit · Inflow and infiltration · Equalization tank · Centrate · all terms