Oregon NPDES permit search
Status, expiry and violations for 125 municipal wastewater permits · issued by Oregon DEQ
In short
How do I look up an NPDES permit in Oregon?
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 Your DEQ Online or DEQ’s older permit documents database. EPA’s ECHO database shows the monitoring results and violations of every permit. The 352 industrial permits in Oregon are listed in Klarifi with a free account.
Links to official sources checked September 2026.
Effective
70
Administratively continued
54
Expired
0
Plants with effluent violations, 3 years
79
Where to find official Oregon NPDES records
Oregon Department of Environmental Quality (Oregon DEQ) runs the NPDES program in Oregon under authorization from EPA Region 10. It issues and enforces the permits and keeps the official file: applications, permits, fact sheets and monitoring reports. EPA issues the permits on tribal lands and in federal waters offshore. Oregon DEQ website ↗
permits
DEQ’s public records portal since May 2025. Choose Permits Licenses Certificates, type the facility name or permit number under Keywords and open the record.
permit documents
Documents from before May 14, 2025: choose the Water Quality Permits jurisdiction, pick a “SEARCH BY” option and enter the term.
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.
- Discharge monitoring reports
- Through EPA’s NetDMR until the report due in October 2026, then in Your DEQ Online.
- Violations and enforcement
- DEQ’s formal enforcement database ↗
Industrial and commercial NPDES permits in Oregon
Most NPDES permits are not held by municipal plants. EPA’s permit database lists 352 individual permits in force for industrial and commercial facilities in Oregon (manufacturers, food processors, mines, power plants, landfills), 14 of them major dischargers, plus 85 facilities covered by a general permit, mostly for stormwater. 84 of the individual permits recorded at least one effluent violation in the last three years.
| Facility | Permit | Status | Expires | Effluent violations |
|---|
Unlock 352 industrial permits in Oregon
Search every industrial and commercial discharger in Oregon by name or permit number, with permit status, expiry and violation history. Free with a Klarifi account.
Industrial and commercial NPDES permits in Oregon: 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 Oregon wastewater plants
79 of the 125 municipal plants on this page recorded at least one effluent violation, a monitored value above a permit limit, in the last three years, and 98 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 9 formal cases naming Oregon wastewater plants, 2 of them since fiscal year 2020, with $62,110 in penalties assessed. Enforcement cases in Oregon →
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: 17 permits
2030: 11 permits
2031: 12 permits
Largest permit holders in Oregon
| Facility | City | Avg flow (MGD) | Design (MGD) | NPDES permit | Status | Expires | Violations (3y) |
|---|---|---|---|---|---|---|---|
| Willow Lake WWTP | Salem | 42.45 | — | ORL026409 | Effective | Dec 2030 | 2 |
| Durham Waste Handling | Tigard | 24.25 | — | ORL028118 | Effective | Dec 2030 | 6 |
| Medford Rwrf | Central Point | 16.52 | 20 | OR0026263 | Administratively continued | Jul 2026 | 1 |
| Gresham WWTP | Portland | 11.55 | 15 | OR0026131 | Administratively continued | Aug 2026 | 0 |
| Albany-Millersburg WRF | Albany | 8.27 | 8.7 | OR0028801 | Effective | Jan 2031 | 2 |
| Tryon Creek WWTP | Lake Oswego | 5.22 | 8.3 | OR0026891 | Effective | Apr 2029 | 2 |
| Mcminnville WWTP | Mcminnville | 4.99 | 5.6 | OR0034002 | Administratively continued | Dec 2008 | 2 |
| Grants Pass STP | Grants Pass | 4.92 | 4 | OR0028843 | Administratively continued | Sep 2014 | 16 |
| Oak Lodge Water Reclamation Facility | Milwaukie | 3.05 | 4 | OR0026140 | Effective | Mar 2027 | 3 |
| Ontario STP | Ontario | 1.87 | 3.06 | OR0020621 | Effective | Jan 2031 | 2 |
Oregon 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 · WWTP · Biosolids · all terms