Clean Water Act discharge permit · NPDES OR0041271
CASCADE LOCKS STP, Cascade Locks, OR: NPDES OR0041271 discharge permit, effluent exceedances, inspections, penalties
- Administratively continuedPermit status
- MinorDischarger class
- 11Pollutants under a numeric limit
- 3Pollutants with an effluent exceedance
CASCADE LOCKS STP, held by CASCADE LOCKS, CITY OF, holds NPDES permit OR0041271, which discharges to Columbia River. EPA’s file records it issued August 28, 2019 and expiring July 31, 2024. 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 | CASCADE LOCKS STP |
|---|---|
| Permittee as filed | CASCADE LOCKS, CITY OF |
| NPDES ID | OR0041271 |
| Permit status | Administratively continued (past its expiration date and still in force until reissued) |
| Permit type | Individual permit |
| Discharger class | Minor discharger |
| Facility type | Publicly owned treatment works |
| Program | Publicly owned treatment works |
| Issued | August 28, 2019 |
| Expiration date | July 31, 2024 |
| Address | Cascade Locks, OR 97014 |
| Receiving water | COLUMBIA RIVER |
| Receiving water impaired | 303(D) Listed |
| Subwatershed | Gilbert River-Frontal Columbia River (HUC 170900120405) |
| 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
- 12Pollutants on file
- 11Under a numeric limit
- 11With a violation of any kind
- 3With 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 | 12 | 21 | 7 | November 30, 2023 | 102% over the limit |
| BOD, carbonaceous [5 day, 20 C] | 12 | 12 | 4 | June 30, 2023 | 99,999% over the limit |
| E. coli | 4 | 15 | 2 | May 31, 2023 | 99,999% over the limit |
| BOD, 5-day, 20 deg. C | 2 | 18 | 0 | ||
| Excess thermal load | 2 | 2 | 0 | ||
| Alkalinity, total [as CaCO3] | 0 | 2 | 0 | ||
| pH | 4 | 1 | 0 | ||
| Ultraviolet light dosage | 2 | 1 | 0 | ||
| Temperature, water deg. centigrade | 1 | 1 | 0 | ||
| BOD, carbonaceous, percent removal | 1 | 1 | 0 | ||
| Solids, suspended percent removal | 1 | 1 | 0 | ||
| Flow, in conduit or thru treatment plant | 2 | 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
- 16Single-event violations
| Date | What EPA recorded | Agency |
|---|---|---|
| March 6, 2026 | Permit Violations - Unapproved Operation | ST6 |
| November 14, 2023 | Management Practice Violations - No Licensed/Certified Operator | ST6 |
| September 16, 2023 | Monitoring Violations - Improper Analysis or Lab Error | ST6 |
| September 15, 2023 | WW SSO - Discharge to Waters | ST6 |
| May 20, 2023 | WW SSO - Discharge to Waters | ST6 |
| December 12, 2022 | WW SSO - Discharge to Waters | ST6 |
| October 8, 2022 | Effluent Violations - Unauthorized Discharge | ST6 |
| October 1, 2022 | Monitoring Violations - Failure to Monitor for Non-Toxicity Requirements | ST6 |
| February 15, 2022 | Effluent Violations - Unauthorized Discharge | ST6 |
| February 1, 2022 | Reporting Violations - Failure to submit required report (non-DMR non-pretreatment) | ST6 |
| January 7, 2022 | Effluent Violations - Unauthorized Discharge | ST6 |
| July 7, 2021 | Reporting Violations - Improper/ Incorrect Reporting | ST6 |
| May 9, 2021 | Monitoring Violations - Failure to Monitor for Non-Toxicity Requirements | ST6 |
| June 1, 2020 | Reporting Violations - Improper/ Incorrect Reporting | ST6 |
| January 1, 2020 | Effluent Violations - Unauthorized Discharge | ST6 |
| November 24, 2019 | Monitoring Violations - Failure to Monitor for Non-Toxicity Requirements | 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.
Watch this permit
One permit holder, $99/month. Watch the register for one permit holder and the places and receiving waters tied to its permits. Choose “One permit holder” and enter this permit’s NPDES ID, OR0041271.
Start the watch
- One permit holder — $99/month
- One watershed — $2,990/year
- One state — $4,990/year
- The whole register — $18,000/year
How we handle your data → Privacy
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 OR0041271 there.
Nearby on the register
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- Every permit record in Cascade Locks, 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.