Clean Water Act discharge permit · NPDES OR0022764
WILSONVILLE STP, Wilsonville, OR: NPDES OR0022764 discharge permit, effluent exceedances, inspections, penalties
- Administratively continuedPermit status
- MajorDischarger class
- 20Pollutants under a numeric limit
- 5Pollutants with an effluent exceedance
WILSONVILLE STP, held by WILSONVILLE, CITY OF, holds NPDES permit OR0022764, which discharges to Willamette River. EPA’s file records it issued August 7, 2020 and expiring July 30, 2025. The status and dates are as EPA’s permit file stood when Velarion loaded it (October 14, 2026); EPA’s free Detailed Facility Report on ECHO carries the permit’s current standing.
Identity
| Facility as filed | WILSONVILLE STP |
|---|---|
| Permittee as filed | WILSONVILLE, CITY OF |
| NPDES ID | OR0022764 |
| Permit status | Administratively continued (past its expiration date and still in force until reissued) |
| Permit type | Individual permit |
| Discharger class | Major discharger |
| Facility type | Publicly owned treatment works |
| Program | Publicly owned treatment works |
| Issued | August 7, 2020 |
| Expiration date | July 30, 2025 |
| Address | Wilsonville, OR 97070 |
| Receiving water | WILLAMETTE RIVER |
| Receiving water impaired | 303(D) Listed |
| Subwatershed | Coffee Lake Creek-Willamette River (HUC 170900070402) |
| Program components on file | POTW, Pretreatment |
| SIC | 4952 – Sewerage Systems |
Cited to the EPA ICIS-NPDES permit file (ECHO download) and EPA’s NAICS/SIC and component files, the same download.
Effluent limits and exceedances
- 21Pollutants on file
- 20Under a numeric limit
- 13With a violation of any kind
- 5With an effluent exceedance
An effluent exceedance is a discharge monitoring report value over the permit’s numeric limit (EPA’s violation code E90). A violation of any kind also counts a report not filed. Each row is EPA’s own count for that pollutant.
| Pollutant or measure | Limits | Violations, any kind | Effluent exceedances | Latest exceedance | Largest exceedance, as filed |
|---|---|---|---|---|---|
| Solids, total suspended | 11 | 72 | 70 | May 31, 2026 | 1,495% over the limit |
| BOD, carbonaceous [5 day, 20 C] | 6 | 15 | 14 | June 30, 2020 | 99,999% over the limit |
| BOD, 5-day, 20 deg. C | 6 | 16 | 13 | April 30, 2022 | 346% over the limit |
| E. coli | 4 | 7 | 5 | November 30, 2023 | 496% over the limit |
| Solids, suspended percent removal | 1 | 1 | 1 | April 30, 2022 | 33% over the limit |
| Temperature, water deg. fahrenheit | 0 | 162 | 0 | ||
| Report due [yrmoda] | 2 | 5 | 0 | ||
| Oil & Grease | 1 | 5 | 0 | ||
| Nitrogen, Kjeldahl, total [as N] | 1 | 5 | 0 | ||
| Nitrite + Nitrate total [as N] | 1 | 5 | 0 | ||
| Phosphorus, total [as P] | 1 | 5 | 0 | ||
| Solids, total dissolved | 1 | 5 | 0 | ||
| Ultraviolet light dosage | 1 | 1 | 0 | ||
| pH | 4 | 0 | 0 | ||
| Flow, in conduit or thru treatment plant | 4 | 0 | 0 | ||
| Temperature, water deg. centigrade | 3 | 0 | 0 | ||
| Oxygen, dissolved [DO] | 1 | 0 | 0 | ||
| Nitrogen, ammonia total [as N] | 1 | 0 | 0 | ||
| Excess thermal load | 1 | 0 | 0 | ||
| BOD, 5-day, percent removal | 1 | 0 | 0 | ||
| Carbonaceous oxygen demand, % removal | 1 | 0 | 0 |
Cited to the EPA ICIS-NPDES limits and effluent violations files (ECHO download); up to 60 rows shown, most exceedances first.
Inspections, violations and enforcement
- 1Single-event violations
| Date | What EPA recorded | Agency |
|---|---|---|
| July 1, 2025 | Reporting Violations - Improper/ Incorrect Reporting | ST6 |
Velarion’s copy of EPA’s ICIS-NPDES files does not include the inspections, formal enforcement actions and informal enforcement actions files, so this page shows none of them. EPA’s free Detailed Facility Report on ECHO lists this permit’s inspections, enforcement actions and penalties.
Cited to the EPA ICIS-NPDES violation, inspection and enforcement files (ECHO download); up to 50 rows of each shown, newest first.
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EPA publishes a free Detailed Facility Report for every permit on ECHO: its compliance status quarter by quarter, its inspections, and its enforcement actions and penalties. EPA also sends free notices of new inspections and enforcement actions through ECHO Notify; enter NPDES ID OR0022764 there.
Nearby on the register
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- Every permit record in Wilsonville, A to Z
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- Every permit record in Oregon, A to Z
Figures from EPA’s ICIS-NPDES download, loaded October 14, 2026.