Clean Water Act discharge permit · NPDES OR0023574
COOS BAY STP NO. 1, Coos Bay, OR: NPDES OR0023574 discharge permit, effluent exceedances, inspections, penalties
- Administratively continuedPermit status
- MajorDischarger class
- 11Pollutants under a numeric limit
- 10Pollutants with an effluent exceedance
COOS BAY STP NO. 1, held by COOS BAY, CITY OF, holds NPDES permit OR0023574, which discharges to Coos Bay. EPA’s file records it issued May 22, 2013 and expiring April 30, 2018. The status and dates are as EPA’s permit file stood when Velarion loaded it (September 14, 2026); EPA’s free Detailed Facility Report on ECHO carries the permit’s current standing.
Identity
| Facility as filed | COOS BAY STP NO. 1 |
|---|---|
| Permittee as filed | COOS BAY, CITY OF |
| NPDES ID | OR0023574 |
| 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 | May 22, 2013 |
| Expiration date | April 30, 2018 |
| Address | Coos Bay, OR 97420 |
| Receiving water | COOS BAY |
| Receiving water impaired | 303(D) Listed |
| Subwatershed | Coos Bay (HUC 171003040306) |
Cited to the EPA ICIS-NPDES permit file (ECHO download).
Effluent limits and exceedances
- 14Pollutants on file
- 11Under a numeric limit
- 14With a violation of any kind
- 10With 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 |
|---|---|---|---|---|---|
| BOD, 5-day, 20 deg. C | 17 | 49 | 28 | April 30, 2025 | 99,999% over the limit |
| Solids, total suspended | 17 | 47 | 21 | December 31, 2024 | 142% over the limit |
| Coliform, fecal - % samples exceeding limit | 1 | 14 | 12 | August 31, 2021 | 490% over the limit |
| Chlorine, total residual | 2 | 13 | 11 | December 31, 2024 | 13,033% over the limit |
| BOD, 5-day, percent removal | 1 | 7 | 5 | August 31, 2019 | 99,999% over the limit |
| Coliform, fecal general | 1 | 6 | 4 | August 31, 2021 | 2,479% over the limit |
| Solids, suspended percent removal | 1 | 6 | 3 | March 31, 2017 | 93% over the limit |
| Enterococci - % samples exceeding limit | 0 | 3 | 3 | February 28, 2025 | 110% over the limit |
| Enterococci | 1 | 3 | 2 | October 31, 2022 | 99,999% over the limit |
| pH | 4 | 5 | 1 | April 30, 2026 | |
| Flow, in conduit or thru treatment plant | 2 | 3 | 0 | ||
| Chlorine usage | 1 | 1 | 0 | ||
| Excess thermal load | 0 | 1 | 0 | ||
| Solids, total dissolved | 0 | 1 | 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
- 10Single-event violations
| Date | What EPA recorded | Agency |
|---|---|---|
| April 6, 2026 | WW SSO - Discharge to Waters | ST6 |
| June 1, 2023 | WW SSO - Discharge to Waters | ST6 |
| March 25, 2022 | WW SSO - Discharge to Waters | ST6 |
| August 24, 2021 | Monitoring Violations - Analysis not Conducted | ST6 |
| January 3, 2021 | Effluent Violations - Unauthorized Discharge | ST6 |
| May 1, 2020 | Management Practice Violations - Improper Land Application (non-503 non-CAFO) | ST6 |
| August 11, 2019 | WW SSO - Discharge to Waters | ST6 |
| February 25, 2019 | WW SSO - Discharge to Waters | ST6 |
| February 25, 2019 | WW SSO - Related Unapproved Bypass | ST6 |
| February 25, 2019 | WW SSO - Improper Operation and Maintenance | 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, OR0023574.
Start the watch
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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 OR0023574 there.
Nearby on the register
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- Every permit record in Coos Bay, A to Z
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- Every permit record in Oregon, A to Z
Figures from EPA’s ICIS-NPDES download, loaded September 14, 2026.