Littlestown STP
Littlestown, PA · Adams County · Publicly Owned Treatment Works
- Average flow
- 0.5 MGD
- Design flow
- 1 MGD
- NPDES permit
- PA0021229
- Effective
- Permit expires
- August 2030
- Population served
- 6,051
- CWNS 2022
Littlestown STP is a publicly owned wastewater treatment works in Littlestown, Adams County, Pennsylvania treating an average of 0.5 million gallons per day against a permitted design capacity of 1 MGD, serving about 6,051 residents. Treatment on site includes clarifiers, carrousels / oxidation ditches. It discharges under NPDES permit PA0021229 (effective), which expires in August 2030, with 4 recorded violations in the last three years.
Treatment technology
Treatment structures identified at this facility. Exact unit counts are available in Klarifi.
Compliance snapshot (last 3 years)
- Total violations
- 4
- 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 Littlestown STP.
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Nearby wastewater treatment plants in Pennsylvania
Mcsherrystown · 5 mi away
3.65 MGD
Gettysburg · 5 mi away
0.12 MGD
Gettysburg · 6 mi away
0.14 MGD
Hanover · 7 mi away
1.75 MGD
New Oxford · 8 mi away
1 MGD
New Oxford · 9 mi away
0.05 MGD
Gettysburg · 10 mi away
0.19 MGD
Hunterstown · 10 mi away
0.07 MGD
Littlestown 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 May 25, 2025.