Harleysville STP
Harleysville, PA · Montgomery County · Publicly Owned Treatment Works
- Average flow
- 0.32 MGD
- Design flow
- 0.59 MGD
- NPDES permit
- PA0024422
- Expired
- Permit expires
- September 2006
- Population served
- —
- CWNS 2022
Harleysville STP is a publicly owned wastewater treatment works in Harleysville, Montgomery County, Pennsylvania treating an average of 0.32 million gallons per day against a permitted design capacity of 0.59 MGD. Treatment on site includes clarifiers, uncovered lagoons. It discharges under NPDES permit PA0024422 (expired), which expires in September 2006, with 1 recorded violation 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
- 1
- Effluent violations
- 1
Based on NPDES Discharge Monitoring Reports. Full violation history, parameters and discharge data available in the Klarifi platform.
Key contacts
3 verified contacts for Harleysville STP, with validated emails and direct phone numbers.
Unlock 3 verified contacts
Names, validated emails and direct phone numbers for decision-makers at Harleysville STP, plus the full compliance history and discharge data.
Nearby wastewater treatment plants in Pennsylvania
Harleysville · 3 mi away
0.5 MGD
Zieglersville · 3 mi away
0.13 MGD
Souderton · 3 mi away
0.94 MGD
Schwenksville · 4 mi away
0.09 MGD
Lansdale · 4 mi away
2.85 MGD
Frederick · 5 mi away
0.03 MGD
Green Lane · 6 mi away
0.1 MGD
Lansdale · 6 mi away
2.15 MGD
Harleysville 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.