Clean Water Act discharge permit · NPDES OR0020419
SILETZ STP, Siletz, OR: NPDES OR0020419 discharge permit, effluent exceedances, inspections, penalties
- Administratively continuedPermit status
- MinorDischarger class
- 18Pollutants under a numeric limit
- 3Pollutants with an effluent exceedance
SILETZ STP, held by SILETZ, CITY OF, holds NPDES permit OR0020419, which discharges to Siletz River (Rm 38.1). EPA’s file records it issued June 5, 2018 and expiring April 30, 2023. The status and dates are as EPA’s permit file stood when Velarion loaded it (September 15, 2026); EPA’s free Detailed Facility Report on ECHO carries the permit’s current standing.
Identity
| Facility as filed | SILETZ STP |
|---|---|
| Permittee as filed | SILETZ, CITY OF |
| NPDES ID | OR0020419 |
| 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 | June 5, 2018 |
| Expiration date | April 30, 2023 |
| Address | Siletz, OR 97380 |
| Receiving water | SILETZ RIVER (RM 38.1) |
| Subwatershed | Dewey Creek-Siletz River (HUC 171002040703) |
Cited to the EPA ICIS-NPDES permit file (ECHO download).
Effluent limits and exceedances
- 18Pollutants on file
- 18Under a numeric limit
- 10With 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 |
|---|---|---|---|---|---|
| pH | 4 | 14 | 4 | November 30, 2024 | |
| E. coli | 4 | 4 | 1 | July 31, 2021 | 23% over the limit |
| BOD, carbonaceous, percent removal | 1 | 2 | 1 | November 30, 2024 | 13% over the limit |
| Solids, total suspended | 12 | 4 | 0 | ||
| BOD, carbonaceous [5 day, 20 C] | 12 | 3 | 0 | ||
| Flow, in conduit or thru treatment plant | 4 | 1 | 0 | ||
| Temperature, water deg. centigrade | 2 | 1 | 0 | ||
| Oxygen, dissolved [DO] | 1 | 1 | 0 | ||
| Nitrogen, ammonia total [as N] | 1 | 1 | 0 | ||
| Solids, suspended percent removal | 1 | 1 | 0 | ||
| BOD, 5-day, 20 deg. C | 7 | 0 | 0 | ||
| Ultraviolet light dosage | 2 | 0 | 0 | ||
| Alkalinity, total [as CaCO3] | 1 | 0 | 0 | ||
| Oil & Grease | 1 | 0 | 0 | ||
| Nitrogen, Kjeldahl, total [as N] | 1 | 0 | 0 | ||
| Hardness, total [as CaCO3] | 1 | 0 | 0 | ||
| Nitrite Plus Nitrate Total | 1 | 0 | 0 | ||
| Depth of pond or reservoir in feet | 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
- 6Single-event violations
| Date | What EPA recorded | Agency |
|---|---|---|
| December 10, 2025 | WW SSO - Discharge to Waters | ST6 |
| January 1, 2025 | Monitoring Violations - Failure to Monitor for Non-Toxicity Requirements | ST6 |
| May 2, 2024 | Monitoring Violations - Failure to Monitor for Non-Toxicity Requirements | ST6 |
| May 1, 2024 | Monitoring Violations - Failure to Monitor for Non-Toxicity Requirements | ST6 |
| December 1, 2021 | Reporting Violations - Failure to Notify | ST6 |
| January 1, 2021 | 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.
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, OR0020419.
Start the watch
- One permit holder — $99/month
- One watershed — $2,990/year
- One state — $4,990/year
- The whole register — $18,000/year
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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 OR0020419 there.
Nearby on the register
Figures from EPA’s ICIS-NPDES download, loaded September 15, 2026.