Upper Gwynedd Twp STP
261 Township Line Road, North Wales, PA 19454 · Montgomery County · Publicly Owned Treatment Works
- Average flow
- 2.55 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 2.55 million gallons per day, serving about 9,299 residents. It discharges under NPDES permit PAL023256 (effective), which expires in December 2030, with 35 recorded violations in the last three years. EPA has recorded 1 formal enforcement action naming the plant, the latest in June 2026.
Treatment technology
One treatment structure or unit process identified at Upper Gwynedd Twp STP.
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See the full treatment train at Upper Gwynedd Twp STP: structures, unit processes and planned upgrades, with exact unit counts.
Compliance snapshot (last 3 years)
- Total violations
- 35
- Effluent violations
- 5
Based on NPDES Discharge Monitoring Reports. Full violation history, parameters and discharge data available in the Klarifi platform.
EPA enforcement history
Federal civil enforcement cases, compliance inspections and informal actions recorded for Upper Gwynedd Twp STP in EPA's ICIS system.
- Formal actions
- 1
- 1 since FY2020
- Penalties assessed
- $16,000
- all cases
- Compliance actions
- $3,000
- required by EPA orders
- EPA inspections
- 0
- none on record
Latest case · Jun 2026
UPPER GWYNEDD TWP STP (UPPER GWYNEDD TWP STP)
Administrative order · CWA, NPDES Permit Violations · Final Order With Penalty · Penalty $16,000 · Compliance actions $3,000
EPA's description of the case:
“On May 19, 2026, Region 3 filed a Consent Agreement and Final Order (CAFO), simultaneously commencing and concluding an administrative enforcement action, against Upper Gwynedd Township for…”
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Source: EPA ECHO, civil enforcement case 03-2026-0064.
Full case history with a free Klarifi account
Every action against Upper Gwynedd Twp STP with dates, milestones, violation types and EPA's complete case summaries, plus inspections and informal actions.
Key contacts
1 verified contact for Upper Gwynedd Twp STP, with validated emails and direct phone numbers.
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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
Ambler · 4 mi away
3.39 MGD
Lansdale · 4 mi away
3.25 MGD
Lansdale · 5 mi away
2.56 MGD
North Wales · 6 mi away
1.04 MGD
Harleysville · 6 mi away
0.6 MGD
Fort Washington · 6 mi away
0.74 MGD
Norristown · 6 mi away
4.87 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 October 12, 2026; facility record last updated September 13, 2026.
Wastewater terms: POTW · MGD · NPDES permit · Inflow and infiltration · Equalization tank · Centrate · all terms