Ohio NPDES permit search
Status, expiry and violations for 841 municipal wastewater permits · issued by Ohio EPA
In short
How do I look up an NPDES permit in Ohio?
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 Ohio EPA’s list of active permits or Ohio EPA’s eDocument Search. EPA’s ECHO database shows the monitoring results and violations of every permit. The 6,895 industrial permits in Ohio are listed in Klarifi with a free account.
Links to official sources checked September 2026.
Effective
762
Administratively continued
50
Expired
28
Plants with effluent violations, 3 years
703
Where to find official Ohio NPDES records
Ohio Environmental Protection Agency (Ohio EPA) runs the NPDES program in Ohio under authorization from EPA Region 5. It issues and enforces the permits and keeps the official file: applications, permits, fact sheets and monitoring reports. Ohio EPA website ↗
permits · permit documents
Ohio EPA’s table of active individual permits. Type the facility, Ohio permit number or county in the search box and click PDF for the permit, or Compliance for its EPA ECHO report.
permit documents · inspections · violations · enforcement
Launch it from Ohio EPA’s help page and enter the facility name and county, adding a document type such as a permit or notice of violation; the folder icon opens all documents for the facility.
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
- Ohio EPA lists permits under its own number, a digit, two letters and five digits (3PR00599), next to the OH number EPA uses (OH0145637).
- Discharge monitoring reports
- Through Ohio EPA’s own eDMR in its eBusiness Center.
Industrial and commercial NPDES permits in Ohio
Most NPDES permits are not held by municipal plants. EPA’s permit database lists 6,895 individual permits in force for industrial and commercial facilities in Ohio (manufacturers, food processors, mines, power plants, landfills), 275 of them major dischargers, plus 132 facilities covered by a general permit, mostly for stormwater. 1,400 of the individual permits recorded at least one effluent violation in the last three years.
| Facility | Permit | Status | Expires | Effluent violations |
|---|
Unlock 6,895 industrial permits in Ohio
Search every industrial and commercial discharger in Ohio by name or permit number, with permit status, expiry and violation history. Free with a Klarifi account.
Industrial and commercial NPDES permits in Ohio: 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 Ohio wastewater plants
703 of the 841 municipal plants on this page recorded at least one effluent violation, a monitored value above a permit limit, in the last three years, and 718 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 107 formal cases naming Ohio wastewater plants, 30 of them since fiscal year 2020, with $5.2 million in penalties assessed. Enforcement cases in Ohio →
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: 148 permits
2030: 116 permits
2031: 93 permits
Largest permit holders in Ohio
| Facility | City | Avg flow (MGD) | Design (MGD) | NPDES permit | Status | Expires | Violations (3y) |
|---|---|---|---|---|---|---|---|
| Southerly Wastewater Treatment Plant | Lockbourne | 112.28 | — | OHL024741 | Effective | Dec 2030 | 9 |
| Southerly Wastewater Treatment Center | Cleveland | 110.09 | — | OHL024651 | Effective | Dec 2030 | 4 |
| Akron WRF | Akron | 59.62 | 90 | OH0023833 | Effective | Aug 2028 | 0 |
| City Of Dayton Water Reclamation Facility (0857100983) | Dayton | 51.69 | 72 | OH0024881 | Effective | Apr 2027 | 17 |
| Metropolitan Sewer Dis Little Miami WWTP | Cincinnati | 44.32 | 55 | OH0025453 | Effective | Jun 2030 | 8 |
| City Of Canton | Canton | 25.4 | 39 | OH0024350 | Effective | May 2028 | 1 |
| Neorsd Westerly Wwt Complex | Cleveland | 27.54 | 35 | OH0024660 | Effective | Jun 2030 | 0 |
| Waste Water Treatment Plant | Youngstown | 33.2 | 35 | OH0028223 | Effective | Oct 2028 | 231 |
| Hamilton Water Reclamation Facility | Hamilton | 8.62 | 32 | OH0025445 | Effective | Oct 2026 | 7 |
| Middletown Wastewater Treatment Plant | Middletown | 21.19 | 26 | OH0026522 | Effective | Dec 2026 | 84 |
Ohio 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 · Sludge dewatering · Biological nutrient removal · all terms