Clean Water Act discharge permit · NPDES OR0023582
COOS BAY STP NO. 2 - EMPIRE, Coos Bay, OR: NPDES OR0023582 discharge permit, effluent exceedances, inspections, penalties
- Administratively continuedPermit status
- MajorDischarger class
- 24Pollutants under a numeric limit
- 10Pollutants with an effluent exceedance
COOS BAY STP NO. 2 - EMPIRE, held by COOS BAY, CITY OF, holds NPDES permit OR0023582, which discharges to Coos Bay. EPA’s file records it issued April 23, 2020 and expiring March 31, 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 | COOS BAY STP NO. 2 - EMPIRE |
|---|---|
| Permittee as filed | COOS BAY, CITY OF |
| NPDES ID | OR0023582 |
| 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 | April 23, 2020 |
| Expiration date | March 31, 2025 |
| Address | Coos Bay, OR 97420 |
| Receiving water | COOS BAY |
| Receiving water impaired | 303(D) Listed |
| Subwatershed | Coos Bay (HUC 171003040306) |
| 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
- 27Pollutants on file
- 24Under a numeric limit
- 19With 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 |
|---|---|---|---|---|---|
| Nitrogen, ammonia total [as N] | 1 | 113 | 89 | October 31, 2018 | 92% over the limit |
| Chlorine, total residual | 0 | 117 | 85 | November 30, 2017 | 2,880% over the limit |
| BOD, 5-day, 20 deg. C | 11 | 52 | 24 | June 30, 2021 | 99,999% over the limit |
| Solids, total suspended | 11 | 49 | 23 | August 31, 2021 | 149% over the limit |
| Coliform, fecal - % samples exceeding limit | 1 | 139 | 16 | June 30, 2021 | 630% over the limit |
| Coliform, fecal general | 1 | 23 | 12 | December 31, 2020 | 99,999% over the limit |
| pH | 4 | 22 | 2 | June 30, 2017 | |
| BOD, 5-day, percent removal | 1 | 5 | 2 | January 31, 2016 | 27% over the limit |
| Enterococci | 1 | 6 | 1 | July 31, 2020 | 400% over the limit |
| Enterococci - % samples exceeding limit | 1 | 1 | 1 | July 31, 2020 | 400% over the limit |
| Temperature, water deg. fahrenheit | 0 | 27 | 0 | ||
| Excess thermal load | 0 | 5 | 0 | ||
| Flow, in conduit or thru treatment plant | 4 | 4 | 0 | ||
| Temperature, water deg. centigrade | 2 | 4 | 0 | ||
| Ultraviolet light dosage | 1 | 3 | 0 | ||
| Solids, suspended percent removal | 1 | 3 | 0 | ||
| Ultraviolet light intensity | 1 | 2 | 0 | ||
| Ultraviolet light transmittance | 1 | 2 | 0 | ||
| Alkalinity, total [as CaCO3] | 1 | 1 | 0 | ||
| Oxygen, dissolved [DO] | 1 | 0 | 0 | ||
| Oil & Grease | 1 | 0 | 0 | ||
| Nitrogen, Kjeldahl, total [as N] | 1 | 0 | 0 | ||
| Nitrite + Nitrate total [as N] | 1 | 0 | 0 | ||
| Phosphorus, total [as P] | 1 | 0 | 0 | ||
| Salinity [PSU] | 1 | 0 | 0 | ||
| Solids, total dissolved | 1 | 0 | 0 | ||
| Report due [yrmoda] | 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
- 3Single-event violations
| Date | What EPA recorded | Agency |
|---|---|---|
| January 6, 2025 | Management Practice Violations - Improper Operation and Maintenance | ST6 |
| March 25, 2022 | Effluent Violations - Numeric effluent violation | ST6 |
| June 1, 2017 | 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, OR0023582.
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 OR0023582 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 October 14, 2026.