Leonard L Nary WWTP @ Montour Run
1935 Hassam Road, Coraopolis, PA 15108 · Allegheny County · Publicly Owned Treatment Works
- Average flow
- 3.49 MGD
- Design flow
- 6.2 MGD
- NPDES permit
- PA0028801
- Effective
- Permit expires
- January 2028
- Population served
- —
- CWNS 2022
Leonard L Nary WWTP @ Montour Run is a publicly owned wastewater treatment works in Coraopolis, Allegheny County, Pennsylvania treating an average of 3.49 million gallons per day against a permitted design capacity of 6.2 MGD. It discharges under NPDES permit PA0028801 (effective), which expires in January 2028, with 8 recorded violations in the last three years.
Treatment technology
2 treatment structures and unit processes identified at Leonard L Nary WWTP @ Montour Run.
Available with a free Klarifi account
See the full treatment train at Leonard L Nary WWTP @ Montour Run: structures, unit processes and planned upgrades, with exact unit counts.
Compliance snapshot (last 3 years)
- Total violations
- 8
- Effluent violations
- 8
Based on NPDES Discharge Monitoring Reports. Full violation history, parameters and discharge data available in the Klarifi platform.
Key contacts
4 verified contacts for Leonard L Nary WWTP @ Montour Run, with validated emails and direct phone numbers.
Unlock 4 verified contacts (1 more than shown)
Names, validated emails and direct phone numbers for decision-makers at Leonard L Nary WWTP @ Montour Run, plus the full compliance history and discharge data.
Nearby wastewater treatment plants in Pennsylvania
Coraopolis · 2 mi away
0.19 MGD
Moon Twp · 3 mi away
2.1 MGD
Pittsburgh · 3 mi away
0.04 MGD
Mckees Rocks · 3 mi away
0.26 MGD
Sewickley · 4 mi away
0.68 MGD
Moon Township · 5 mi away
0.89 MGD
Pgh · 5 mi away
0.05 MGD
Pittsburgh · 5 mi away
0.03 MGD
Leonard L Nary WWTP @ Montour Run: 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 March 1, 2025.
Wastewater terms: POTW · MGD · NPDES permit · Inflow and infiltration · Ozonation · Activated sludge · all terms