How many wastewater treatment plants are there in Oklahoma?

Klarifi tracks 236 publicly owned wastewater treatment plants in Oklahoma with a combined average flow of 270 million gallons per day, serving about 2,214,246 residents. 49 of them treat more than 1 MGD and 5 more than 10 MGD.

What is the largest wastewater treatment plant in Oklahoma?

Okc South Canadian Wwt in Oklahoma City is the largest plant in Oklahoma by average flow, treating about 37.17 MGD.

What treatment technologies are common in Oklahoma?

190 of Oklahoma's plants use lagoon systems and 18 have biogas or anaerobic digestion infrastructure, based on Klarifi's aerial imagery review.

How many NPDES permits in Oklahoma are up for renewal?

31 permits held by Oklahoma plants expire in 2026 and 35 in 2027. Renewals typically bring new limits and trigger upgrade projects.

Try for free Log in

Wastewater treatment plants in Oklahoma

Name: Wastewater treatment plants in Oklahoma
Creator: Klarifi
License: https://klarifi.io/terms-of-service

236 facilities · 270 MGD combined flow

Klarifi tracks 236 publicly owned wastewater treatment plants in Oklahoma with a combined average flow of 270 MGD, serving about 2,214,246 residents. 49 plants treat more than 1 MGD and 5 more than 10 MGD; 190 use lagoon systems and 18 have digesters or biogas infrastructure. The largest is Okc South Canadian Wwt in Oklahoma City at 37.17 MGD. 31 NPDES permits expire this year and 35 next year.

Every plant below links to a profile with average and design flow, the NPDES permit and its expiry, a three-year compliance snapshot and the capital projects planned in its city. Treatment technology and verified contacts are shown with a free Klarifi account. Showing facilities 1–200 of 236 by average flow — browse the rest with the page links below.

236 plant locations in Oklahoma; dot size follows average flow. Boundaries: U.S. Census Bureau.

NPDES permits and renewals in Oklahoma

Every plant discharges under an NPDES permit that is renewed every five years, usually with tighter limits. The renewal year is the year a plant budgets for upgrades.

All NPDES permits in Oklahoma →31 permits expiring in 2026 →35 permits expiring in 2027 →47 permits expiring in 2028 →Find plants near you on the map →

Largest wastewater treatment plants in Oklahoma

The 10 largest publicly owned wastewater treatment plants in Oklahoma by average flow, with NPDES permit, expiry and three-year violation count. Source: EPA ICIS-NPDES via Klarifi.
Facility	City	Avg flow (MGD)	Design (MGD)	NPDES permit	Expires	Violations (3y)
Okc South Canadian Wwt	Oklahoma City	37.17	80	OK0036978	Jul 2029	188
Northside Wastewater Treatment Plant	Tulsa	23.36	42.6	OK0026221	Feb 2028	19
Tmua South	Tulsa	20.88	42	OK0026239	May 2029	21
Ok City Water Util Trst-Deer Ck	Oklahoma City	12.86	15	OK0027561	Aug 2029	41
Haikey Creek Wastewater Treatment Plant	Broken Arrow	12.67	16	OK0034363	Apr 2030	3
Norman (main) Wwt	Norman	9.95	16	OK0029190	Oct 2030	59
Lawton, City Of	Lawton	8.95	18	OK0035246	Sep 2030	171
Edmond, City Of - Coffee Creek	Edmond	6.91	12	OK0026026	Oct 2030	20
Midwest City Wwt	Oklahoma City	5.66	15	OK0026841	Apr 2020	42
Lynn Lane Waste Water Treatment Plant	Broken Arrow	5.55	8	OK0040053	Apr 2030	51

Treatment technology for each plant is shown with a free Klarifi account. Create one →

The 50 largest plants in Oklahoma →EPA enforcement actions in Oklahoma →Oklahoma capital improvement plans →

Oklahoma plants by treatment technology

Lagoon systems (190)Activated sludge and clarifiers (79)Oxidation ditches (29)Anaerobic digesters and biogas (18)

All 236 plants in Oklahoma

Facility	City	Flow (MGD)
Okc South Canadian Wwt	Oklahoma City	37.17
Northside Wastewater Treatment Plant	Tulsa	23.36
Tmua South	Tulsa	20.88
Ok City Water Util Trst-Deer Ck	Oklahoma City	12.86
Haikey Creek Wastewater Treatment Plant	Broken Arrow	12.67
Norman (main) Wwt	Norman	9.95
Lawton, City Of	Lawton	8.95
Edmond, City Of - Coffee Creek	Edmond	6.91
Midwest City Wwt	Oklahoma City	5.66
Lynn Lane Waste Water Treatment Plant	Broken Arrow	5.55
Ok City Water Util Trst-Chisholm	Edmond	5.33
City Of Muskogee Pollution Control Plant	Muskogee	5.23
City Of Moore WWTP	Moore	5.08
Oowa / Tsc	Pryor	4.94
Stillwater, City Of	Stillwater	4.64
Tahlequah Pwa	Tahlequah	4.17
Ponca City, City Of	Ponca City	3.9
Okmulgee WWTP	Okmulgee	3.16
Owasso Public Works Authority	Owasso	2.98
Shawnee Municipal Auth- North	Shawnee	2.97
Enid, City Of	Enid	2.89
City Of Ardmore Wastewater Treatment Plant	Ardmore	2.65
Sapulpa WWTF	Sapulpa	2.63
Bixby Pulbic Works Auth -South	Bixby	2.42
Yukon, City Of	Yukon	2.38
Altus SE Wastewater Treatment Plant	Altus	2.14
Jenks Wastewater Treat. Plant	Jenks	1.95
Del City Municipal Svcs. Auth	Del City	1.9
Miami WWTF-SE Plant	Miami	1.88
Sand Springs Main WWTP	Sand Springs	1.78
Poteau, City Of	Poteau	1.7
Foss Reservoir M.C.D.	Foss	1.69
Durant City Utilities Auth	Durant	1.52
Mcalester, City Of - West Plant	Mcalester	1.45
City Of Sallisaw Solid Waste Disposal Facility	Sallisaw	1.42
Chickasha WWTP	Chickasha	1.41
Mustang Improvement Authority	Mustang	1.37
Duncan Public Utilities Auth	Duncan	1.37
Shawnee Municipal Auth-South	Shawnee	1.33
El Reno Municipal Authority	El Reno	1.13
Stilwell Area Development Auth	Stilwell	1.12
Weatherford Public Works Authority	Weatherford	1.11
Hugo Municipal Authority	Hugo	1.11
Idabel Public Works Authority	Idabel	1.1
Pryor Creek WWTP	Pryor	1.07
Pauls Valley Wwt	Pauls Valley	1.06
Coweta Pwa	Coweta	1.04
Mcalester East WWTP	Mcalester	1.03
Tulsa MUA-Lower Bird Ck Plant	Catoosa	1.03
Guymon City Of	Guymon	0.96
Vinita Wwt	Vinita	0.95
Seminole Wwt	Seminole	0.92
Cushing, City Of - South STP	Cushing	0.91
Skiatook, Town Of	Skiatook	0.88
Blackwell, City Of	Blackwell	0.88
Glenpool Wwt	Glenpool	0.87
Wagoner	Wagoner	0.81
Guthrie	Guthrie	0.76
Inola Public Works Authority	Inola	0.73
Atoka, City Of	Atoka	0.72
Nowata, City Of	Nowata	0.67
Sulphur Municipal Authority	Sulphur	0.66
Grove Msa	Grove	0.61
Holdenville Pwa	Holdenville	0.6
Wilburton Pwa -Industrial Park	Wilburton	0.58
Antlers Pwa	Antlers	0.57
Wagoner County Rwsg & Swm D#4	Coweta	0.57
Newcastle Public Works Auth.	Newcastle	0.52
Rogers County Rsd #1	Claremore	0.51
Heavener Utility Authority	Heavener	0.51
Kingfisher	Kingfisher	0.5
Fort Gibson	Fort Gibson	0.47
Chickasaw Tribal Utilities Authority	Thackerville	0.46
Madill Pwa	Madill	0.46
Noble Utilities Auth - North	Noble	0.46
Purcell Wwt	Purcell	0.46
Drumright Utilities Trust	Drumright	0.45
Lexington Public Works Auth	Lexington	0.44
Muldrow Utility Authority	Muldrow	0.44
Eufaula Public Works Authority	Eufaula	0.44
Stigler Municipal Improvement Authority	Stigler	0.42
City Of Seneca	West Seneca	0.41
Checotah WWTP	Checotah	0.41
Bristow Municipal Authority	Bristow	0.41
Okemah Utilities Authority	Okemah	0.41
Coalgate Pwa	Coalgate	0.4
Anadarko Pwa	Anadarko	0.39
Panama Public Works Authority	Panama	0.38
Roland, Town Of	Roland	0.38
Wewoka Public Works Authority-Wewoka WTP	Wewoka	0.38
Davis, City Of	Davis	0.37
Watonga, City Of	Watonga	0.36
Tecumseh, City Of	Tecumseh	0.35
Dewey Public Works Authority	Dewey	0.34
Jay Utilities Authority	Jay	0.34
Perry, City Of	Perry	0.33
Harrah Pwa	Harrah	0.33
Calera Pwa	Calera	0.3
City Of Newkirk	Newkirk	0.29
Mcloud Pwa	Mcloud	0.27
Chouteau Pwa	Chouteau	0.27
Krebs Utilities Authority	Krebs	0.26
Wynnewood Water & Light	Wynnewood	0.26
Spiro Mia	Spiro	0.25
Pocola Municipal Authority	Pocola	0.25
Perkins Wwt	Perkins	0.21
Westville Utility Auth	Westville	0.21
Ardmore, City Of -Industrial Park	Ardmore	0.2
Commerce-Cl2 Station - Well 5	Commerce	0.2
Stroud South Wwt	Stroud	0.2
Barnsdall, City Of	Barnsdall	0.19
Kiefer Public Works Authority	Kiefer	0.19
Spencer, City Of	Spencer	0.19
Lone Grove W&s Trust Auth-East	Lone Grove	0.19
Mannford Wwt	Mannford	0.19
Chandler Municipal Authority	Chandler	0.18
Cleveland South WWTP	Cleveland	0.18
Marietta, City Of	Marietta	0.18
Langston WWTP	Langston	0.18
Tishomingo, City Of	Tishomingo	0.17
Kingston, Town Of	Kingston	0.17
Stroud Ua-North Plant	Stroud	0.16
Fairfax Public Works Auth	Fairfax	0.16
Colbert Wwt	Colbert	0.16
Salina Public Works Auth	Salina	0.16
Talihina Pwa	Talihina	0.15
Meeker, Town Of	Meeker	0.15
Pawhuska, City Of	Pawhuska	0.14
Haileyville, City Of	Haileyville	0.14
Tonkawa-Cl2 Booster Station	Tonkawa	0.14
Prague, City Of	Prague	0.14
South Coffeyville Pwa	South Coffeyville	0.13
Shidler, City Of	Shidler	0.13
Healdton Wwt	Healdton	0.13
Gans, Town Of	Gans	0.13
Jim E. Hamilton Correctional Center	Hodgen	0.12
Sperry Pwa Wwt	Sperry	0.12
Haskell Pub Works Auth	Haskell	0.12
Pawnee	Pawnee	0.12
Quinton	Quinton	0.12
Town Of Vian / Vian Pwa	Vian	0.12
Stratford Public Works Auth.	Stratford	0.12
Wellston Pwa	Wellston	0.1
Lindsay, City Of	Lindsay	0.1
Carnegie Public Works Auth.	Carnegie	0.1
Weleetka Pwa	Weleetka	0.1
Union City Wwt Facility	Union City	0.1
Quapaw Pwa	Quapaw	0.1
Hulbert Public Works Authority	Hulbert	0.09
Afton Pwa	Afton	0.09
Yale City Of / Yale City Of	Yale	0.09
Ok St Dept Of Corrections-Howa	Atoka	0.09
Morris, City Of -NW Plant	Morris	0.08
Ottawa Co Rwd #1	Wyandotte	0.08
Frederick (east) Wwt	Frederick	0.08
Soper Public Works Authority	Soper	0.08
Warner Utilities Authority	Warner	0.07
Jones Pwa	Jones	0.07
Verden, Town Of	Verden	0.07
Langley Public Works Authority	Langley	0.07
Hydro, Town Of	Hydro	0.06
Cherokee Former City Hall	Cherokee	0.06
Ochelata Utilities Authority	Ochelata	0.06
Maud, City Of	Maud	0.06
Stringtown Pwa	Stringtown	0.05
Dewar WWTF	Dewar	0.05
Tuttle, City Of	Tuttle	0.05
Crowder Pwa Wwt	Crowder	0.05
Choctaw Co. Rw & Sd #1	Grant	0.05
Valley Brook, Town Of	Valley Brook	0.05
Konawa, City Of	Konawa	0.04
Wister, City Of	Wister	0.04
Garber, City Of	Garber	0.04
Hartshorne, City Of	Hartshorne	0.04
Fairland Pwa	Fairland	0.04
Allen, Town Of	Allen	0.04
Oologah Public Works Authority	Oologah	0.04
Clayton Pwa	Clayton	0.04
Wright Public Works Authority	Wright City	0.03
Porter WWTP	Porter	0.03
Leflore County Rw & Sd #5	Leflore	0.03
Porum Public Works Authority	Porum	0.03
Kaw City WWTF	Kaw City	0.03
Shady Point Pwa	Shady Point	0.03
Pittsburg Co Rwd #20 -- Carlton Landing WWTF	Eufaula	0.03
Boswell, Town Of	Boswell	0.03
Depew, Town Of	Depew	0.03
Minco WWTF	Minco	0.03
Oakland Pwa	Oakland	0.03
Seneca-Cayuga Tribe	Miami	0.03
Cameron Pwa	Cameron	0.03
Haskell Co. Rwd #2	Kinta	0.02
Candian Public Works Auth	Canadian	0.02
Mccurtain Wwt	Mccurtain	0.01
Whitefield Mia	Whitefield	0.01
Carney Public Utilities Auth	Carney	0.01
Mill Creek, Town Of	Mill Creek	0.01
Gore Wwt	Gore	0.01
Mannford Pwa - East Plant	Mannford	0.01
Pensacola Pub Works Authority	Pensacola	0.0078

Page

Wastewater treatment in Oklahoma: 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.

Wastewater terms: WWTP · POTW · MGD · NPDES permit · Anaerobic digester · Lift station · all terms

Cite this page

Journalists, researchers and educators are welcome to quote these figures. Please credit Klarifi as the source and link to this page.

Klarifi. “Wastewater treatment plants in Oklahoma.” Updated October 26, 2026. https://klarifi.io/facilities/oklahoma

Need a custom cut of the data for a state, a county or a list of plants? Email info@klarifi.io.

Try Klarifi for free

Create your own trial account and explore how Klarifi can help you.

Try for free