How much wastewater does Knox Boro STP treat?

Knox Boro STP treats an average of 0.12 MGD and is permitted for a design flow of 0.5 MGD.

What treatment technology does Knox Boro STP use?

Klarifi has identified clarifiers at the Knox facility.

What is the NPDES permit for Knox Boro STP?

The facility discharges under NPDES permit PA0025283, currently effective, expiring May 2031.

Is Knox Boro STP in compliance?

Discharge monitoring reports show 27 violations at Knox Boro STP in the last three years, 27 of them effluent limit exceedances. The full history is available in Klarifi.

Who operates Knox Boro STP and how do I contact them?

Knox Boro STP is a publicly owned treatment works in Knox, Pennsylvania. Klarifi lists decision-maker contacts for this facility, available with a free trial.

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Knox Boro STP

Knox, PA · Clarion County · Publicly Owned Treatment Works

Average flow: 0.12 MGD

Design flow: 0.5 MGD

NPDES permit: PA0025283; Effective

Permit expires: May 2031

Population served: —; CWNS 2022

Knox Boro STP is a publicly owned wastewater treatment works in Knox, Clarion County, Pennsylvania treating an average of 0.12 million gallons per day against a permitted design capacity of 0.5 MGD. Treatment on site includes clarifiers. It discharges under NPDES permit PA0025283 (effective), which expires in May 2031, with 27 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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Compliance snapshot (last 3 years)

Total violations: 27

Effluent violations: 27

Based on NPDES Discharge Monitoring Reports. Full violation history, parameters and discharge data available in the Klarifi platform.

Key contacts

Decision-makers at Knox Boro STP.

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Nearby wastewater treatment plants in Pennsylvania

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Washington Twp STP

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Strattanville Boro STP

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Parker City STP

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Rimersburg Boro STP

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Bruin Boro Bear Creek Watershed Authority

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Bradys Bend STP

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Knox Boro 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 24, 2025.

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