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Okmulgee WWTP

N3950 Rd, Okmulgee, OK 74447 · Okmulgee County · Publicly Owned Treatment Works

Average flow
3.16 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 3.16 million gallons per day against a permitted design capacity of 10 MGD, serving about 13,721 residents. It discharges under NPDES permit OK0028134 (administratively continued), which expires in May 2022, with 101 recorded violations in the last three years. EPA has recorded 3 formal enforcement actions naming the plant, the latest in October 2013.

Treatment technology

2 treatment structures and unit processes identified at Okmulgee WWTP.

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See the full treatment train at Okmulgee WWTP: structures, unit processes and planned upgrades, with exact unit counts.

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Compliance snapshot (last 3 years)

Total violations
101
Effluent violations
7

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 Okmulgee WWTP in EPA's ICIS system.

Formal actions
3
0 since FY2020
Penalties assessed
$470,000
all cases
Compliance actions
$20M
required by EPA orders
EPA inspections
1
latest Jan 2003

Latest case · Oct 2013

OKMULGEE, CITY OF WASTEWATER TREATMENT PLANT

Judicial case · CWA, NPDES Discharge without a Permit · Final Order With Penalty · Penalty $470,000 · Compliance actions $19M

Source: EPA ECHO, civil enforcement case 06-2001-0272.

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Every action against Okmulgee WWTP with dates, milestones, violation types and EPA's complete case summaries, plus inspections and informal actions.

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Key contacts

Decision-makers at Okmulgee WWTP.

No verified contacts on file yet

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Nearby wastewater treatment plants in Oklahoma

Morris, City Of -NW Plant

Morris · 6 mi away

0.08 MGD

Dewar WWTF

Dewar · 10 mi away

0.05 MGD

Mounds Pwa Wwt

Mounds · 19 mi away

0.00015 MGD

Boynton Pwa

Boynton · 19 mi away

—

Weleetka Pwa

Weleetka · 21 mi away

0.1 MGD

Okemah Utilities Authority

Okemah · 21 mi away

0.41 MGD

Haskell Pub Works Auth

Haskell · 23 mi away

0.12 MGD

Dustin Public Works Authority

Dustin · 23 mi away

—

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 October 26, 2026; facility record last updated August 19, 2026.

Wastewater terms: POTW · MGD · NPDES permit · Inflow and infiltration · FOG · Equalization tank · all terms


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