Salisbury Twp Gap STP
Gap, PA · Lancaster County · Publicly Owned Treatment Works
- Average flow
- 0.26 MGD
- Design flow
- 0.58 MGD
- NPDES permit
- PA0081574
- Effective
- Permit expires
- April 2030
- Population served
- —
- CWNS 2022
Salisbury Twp Gap STP is a publicly owned wastewater treatment works in Gap, Lancaster County, Pennsylvania treating an average of 0.26 million gallons per day against a permitted design capacity of 0.58 MGD. Treatment on site includes clarifiers. It discharges under NPDES permit PA0081574 (effective), which expires in April 2030, with 6 recorded violations in the last three years.
Treatment technology
Treatment structures identified at this facility. Exact unit counts are available in Klarifi.
Clarifiers
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Compliance snapshot (last 3 years)
- Total violations
- 6
- Effluent violations
- 6
Based on NPDES Discharge Monitoring Reports. Full violation history, parameters and discharge data available in the Klarifi platform.
Key contacts
Decision-makers at Salisbury Twp Gap STP.
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Nearby wastewater treatment plants in Pennsylvania
Atglen · 4 mi away
0.12 MGD
Atglen · 4 mi away
0.08 MGD
Quarryville · 5 mi away
0.02 MGD
Narvon · 6 mi away
0.0061 MGD
Intercourse · 6 mi away
0.24 MGD
Paradise · 6 mi away
0.13 MGD
New Holland · 7 mi away
0.34 MGD
New Holland · 7 mi away
0.78 MGD
Salisbury Twp Gap 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.