Stewartstown STP
Stewartstown, PA · York County · Publicly Owned Treatment Works
- Average flow
- 0.26 MGD
- Design flow
- 0.63 MGD
- NPDES permit
- PA0036269
- Administratively continued
- Permit expires
- August 2026
- Population served
- 1,096
- CWNS 2022
Stewartstown STP is a publicly owned wastewater treatment works in Stewartstown, York County, Pennsylvania treating an average of 0.26 million gallons per day against a permitted design capacity of 0.63 MGD, serving about 1,096 residents. Treatment on site includes clarifiers, aerated lagoons. It discharges under NPDES permit PA0036269 (administratively continued), which expires in August 2026, with 2 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
- 2
- Effluent violations
- 2
Based on NPDES Discharge Monitoring Reports. Full violation history, parameters and discharge data available in the Klarifi platform.
Key contacts
2 verified contacts for Stewartstown STP, with validated emails and direct phone numbers.
Unlock 2 verified contacts
Names, validated emails and direct phone numbers for decision-makers at Stewartstown STP, plus the full compliance history and discharge data.
Nearby wastewater treatment plants in Pennsylvania
New Freedom · 5 mi away
1.4 MGD
Glen Rock · 8 mi away
0.32 MGD
York · 10 mi away
0.46 MGD
Delta · 15 mi away
0.08 MGD
York · 15 mi away
0.19 MGD
York · 19 mi away
7.61 MGD
Wrightsville · 20 mi away
0.37 MGD
Hanover · 20 mi away
1.75 MGD
Stewartstown 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 27, 2025.