Upper Gwynedd Twp STP
North Wales, PA · Montgomery County · Publicly Owned Treatment Works
- Average flow
- 2.21 MGD
- Design flow
- —
- NPDES permit
- PAL023256
- Effective
- Permit expires
- December 2030
- Population served
- 9,299
- CWNS 2022
Upper Gwynedd Twp STP is a publicly owned wastewater treatment works in North Wales, Montgomery County, Pennsylvania treating an average of 2.21 million gallons per day, serving about 9,299 residents. Treatment on site includes clarifiers, uncovered lagoons. It discharges under NPDES permit PAL023256 (effective), which expires in December 2030, with 36 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
- 36
- Effluent violations
- 6
Based on NPDES Discharge Monitoring Reports. Full violation history, parameters and discharge data available in the Klarifi platform.
Key contacts
1 verified contact for Upper Gwynedd Twp STP, with validated emails and direct phone numbers.
Unlock 1 verified contact
Names, validated emails and direct phone numbers for decision-makers at Upper Gwynedd Twp STP, plus the full compliance history and discharge data.
Nearby wastewater treatment plants in Pennsylvania
Worcester · 3 mi away
0.14 MGD
Lansdale · 4 mi away
2.85 MGD
Lansdale · 5 mi away
2.15 MGD
North Wales · 6 mi away
0.97 MGD
Harleysville · 6 mi away
0.5 MGD
Fort Washington · 6 mi away
0.67 MGD
Norristown · 6 mi away
3.96 MGD
Plymouth Meeting · 6 mi away
3.6 MGD
Upper Gwynedd Twp 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.