How much wastewater does Okmulgee WWTP treat?

Okmulgee WWTP treats an average of 2.48 MGD and is permitted for a design flow of 10 MGD.

What treatment technology does Okmulgee WWTP use?

Klarifi has identified clarifiers, uncovered lagoons at the Okmulgee facility.

What is the NPDES permit for Okmulgee WWTP?

The facility discharges under NPDES permit OK0028134, currently administratively continued, expiring May 2022.

Is Okmulgee WWTP in compliance?

Discharge monitoring reports show 93 violations at Okmulgee WWTP in the last three years, 7 of them effluent limit exceedances. The full history is available in Klarifi.

Who operates Okmulgee WWTP and how do I contact them?

Okmulgee WWTP is a publicly owned treatment works in Okmulgee, Oklahoma. Klarifi lists decision-maker contacts for this facility, available with a free trial.

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Okmulgee WWTP

Okmulgee, OK · Okmulgee County · Publicly Owned Treatment Works

Average flow: 2.48 MGD

Design flow: 10 MGD

NPDES permit: OK0028134; Administratively continued

Permit expires: May 2022

Population served: 13,721; CWNS 2022

Okmulgee WWTP is a publicly owned wastewater treatment works in Okmulgee, Okmulgee County, Oklahoma treating an average of 2.48 million gallons per day against a permitted design capacity of 10 MGD, serving about 13,721 residents. Treatment on site includes clarifiers, uncovered lagoons. It discharges under NPDES permit OK0028134 (administratively continued), which expires in May 2022, with 93 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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Uncovered lagoons

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Compliance snapshot (last 3 years)

Total violations: 93

Effluent violations: 7

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

Key contacts

Decision-makers at Okmulgee WWTP.

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Okmulgee WWTP: 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 August 19, 2026.

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