How much wastewater does Leonard L Nary WWTP @ Montour Run treat?

Leonard L Nary WWTP @ Montour Run treats an average of 2.56 MGD and is permitted for a design flow of 6.2 MGD.

What treatment technology does Leonard L Nary WWTP @ Montour Run use?

Klarifi has identified clarifiers, biogas silos at the Coraopolis facility.

What is the NPDES permit for Leonard L Nary WWTP @ Montour Run?

The facility discharges under NPDES permit PA0028801, currently effective, expiring January 2028.

Is Leonard L Nary WWTP @ Montour Run in compliance?

Discharge monitoring reports show 8 violations at Leonard L Nary WWTP @ Montour Run in the last three years, 8 of them effluent limit exceedances. The full history is available in Klarifi.

Who operates Leonard L Nary WWTP @ Montour Run and how do I contact them?

Leonard L Nary WWTP @ Montour Run is a publicly owned treatment works in Coraopolis, Pennsylvania. Klarifi lists 4 verified decision-maker contacts for this facility, available with a free trial.

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Leonard L Nary WWTP @ Montour Run

Coraopolis, PA · Allegheny County · Publicly Owned Treatment Works

Average flow: 2.56 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 2.56 million gallons per day against a permitted design capacity of 6.2 MGD. Treatment on site includes clarifiers, biogas silos. It discharges under NPDES permit PA0028801 (effective), which expires in January 2028, with 8 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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Biogas silos

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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.

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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.

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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 September 11, 2026; facility record last updated March 1, 2025.

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