Oklahoma NPDES permit search
Status, expiry and violations for 236 municipal wastewater permits · issued by ODEQ as OPDES permits
In short
How do I look up an NPDES permit in Oklahoma?
Search this page by permit number or plant name for a municipal plant’s permit status, expiry date and violations. For the official file, search Permits for Public Review. EPA’s ECHO database shows the monitoring results and violations of every permit. The 694 industrial permits in Oklahoma are listed in Klarifi with a free account.
Links to official sources checked September 2026.
Effective
199
Administratively continued
31
Expired
5
Plants with effluent violations, 3 years
210
Where to find official Oklahoma NPDES records
Oklahoma Department of Environmental Quality (ODEQ) runs the NPDES program in Oklahoma under authorization from EPA Region 6, as the Oklahoma Pollutant Discharge Elimination System (OPDES). It issues and enforces the permits and keeps the official file: applications, permits, fact sheets and monitoring reports. EPA Region 6 issues the permits on tribal lands and for oil and gas activities, and the Oklahoma Department of Agriculture, Food and Forestry runs its own program for animal feeding operations and other farm discharges. ODEQ website ↗
permits · applications · permit documents
Type the facility, company or permit number (for example OK0002551) in the search box, pick the row with division WQD and check its step and status; “Additional Documents” opens its files.
permits · DMRs · inspections · violations · enforcement
EPA’s Enforcement and Compliance History Online. Search water facilities by permit number, name or city; the Detailed Facility Report lists inspections, violations and enforcement actions, and Effluent Charts plot monitoring results against the permit limits.
- Permit numbers
- Individual OPDES permits are OK plus seven digits (OK0002551); general permits carry names such as OKR05 and OKG38.
- Discharge monitoring reports
- Through DEQ’s own E2 e-DMR application.
Industrial and commercial NPDES permits in Oklahoma
Most NPDES permits are not held by municipal plants. EPA’s permit database lists 694 individual permits in force for industrial and commercial facilities in Oklahoma (manufacturers, food processors, mines, power plants, landfills), 100 of them major dischargers, plus 297 facilities covered by a general permit, mostly for stormwater. 91 of the individual permits recorded at least one effluent violation in the last three years.
| Facility | Permit | Status | Expires | Effluent violations |
|---|
Unlock 694 industrial permits in Oklahoma
Search every industrial and commercial discharger in Oklahoma by name or permit number, with permit status, expiry and violation history. Free with a Klarifi account.
Industrial and commercial NPDES permits in Oklahoma: permits in force (effective or administratively continued) held by facilities EPA does not class as publicly owned treatment works or federal facilities. Source: EPA ICIS-NPDES via Klarifi, October 2026.
Violations at Oklahoma wastewater plants
210 of the 236 municipal plants on this page recorded at least one effluent violation, a monitored value above a permit limit, in the last three years, and 216 had a violation of any kind, including late or missing monitoring reports. Each plant’s page shows its own count. EPA’s enforcement records list 41 formal cases naming Oklahoma wastewater plants, 9 of them since fiscal year 2020, with $496,890 in penalties assessed. Enforcement cases in Oklahoma →
Permit renewals by year
An NPDES permit runs for five years. To keep discharging, a plant must apply for renewal at least 180 days before the expiry date, and the renewed permit usually arrives with tighter effluent limits, new monitoring requirements or a compliance schedule. That is why the year a permit expires is the year a plant starts budgeting for upgrades: nutrient removal, disinfection, capacity or controls.
2029: 41 permits
2030: 40 permits
2031: 29 permits
Largest permit holders in Oklahoma
| Facility | City | Avg flow (MGD) | Design (MGD) | NPDES permit | Status | Expires | Violations (3y) |
|---|---|---|---|---|---|---|---|
| Okc South Canadian Wwt | Oklahoma City | 37.17 | 80 | OK0036978 | Effective | Jul 2029 | 188 |
| Northside Wastewater Treatment Plant | Tulsa | 23.36 | 42.6 | OK0026221 | Effective | Feb 2028 | 18 |
| Tmua South | Tulsa | 20.88 | 42 | OK0026239 | Effective | May 2029 | 21 |
| Lawton, City Of | Lawton | 8.95 | 18 | OK0035246 | Effective | Sep 2030 | 171 |
| Haikey Creek Wastewater Treatment Plant | Broken Arrow | 12.67 | 16 | OK0034363 | Effective | Apr 2030 | 3 |
| Norman (main) Wwt | Norman | 9.95 | 16 | OK0029190 | Effective | Oct 2030 | 59 |
| Midwest City Wwt | Oklahoma City | 5.66 | 15 | OK0026841 | Administratively continued | Apr 2020 | 42 |
| Ok City Water Util Trst-Deer Ck | Oklahoma City | 12.86 | 15 | OK0027561 | Effective | Aug 2029 | 41 |
| City Of Muskogee Pollution Control Plant | Muskogee | 5.23 | 13.74 | OK0029131 | Effective | Dec 2030 | 41 |
| Edmond, City Of - Coffee Creek | Edmond | 6.91 | 12 | OK0026026 | Effective | Oct 2030 | 20 |
Oklahoma NPDES permits: questions
NPDES permit search in other states
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 12, 2026.
Wastewater terms: NPDES permit · POTW · Significant industrial user · MGD · FOG · Equalization tank · all terms