Clean Water Act discharge permit · NPDES OR0020648
SHERIDAN STP, Sheridan, OR: NPDES OR0020648 discharge permit, effluent exceedances, inspections, penalties
- Administratively continuedPermit status
- MinorDischarger class
- 13Pollutants under a numeric limit
- 5Pollutants with an effluent exceedance
SHERIDAN STP, held by SHERIDAN, CITY OF, holds NPDES permit OR0020648, which discharges to South Yamhill River (Rm 36.6). EPA’s file records it issued October 4, 2010 and expiring June 30, 2015. 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 | SHERIDAN STP |
|---|---|
| Permittee as filed | SHERIDAN, CITY OF |
| NPDES ID | OR0020648 |
| 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 | October 4, 2010 |
| Expiration date | June 30, 2015 |
| Address | Sheridan, OR 97378 |
| Receiving water | SOUTH YAMHILL RIVER (RM 36.6) |
| Receiving water impaired | 303(D) Listed |
| Subwatershed | Rock Creek-South Yamhill River (HUC 170900080401) |
Cited to the EPA ICIS-NPDES permit file (ECHO download).
Effluent limits and exceedances
- 13Pollutants on file
- 13Under a numeric limit
- 12With 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 |
|---|---|---|---|---|---|
| Nitrogen, ammonia total [as N] | 4 | 11 | 10 | April 30, 2026 | 158% over the limit |
| BOD, 5-day, 20 deg. C | 6 | 25 | 2 | March 31, 2026 | 23% over the limit |
| Solids, total suspended | 6 | 31 | 1 | February 28, 2025 | 30% over the limit |
| Solids, suspended percent removal | 1 | 6 | 1 | January 31, 2022 | 13% over the limit |
| Flow, total | 1 | 1 | 1 | June 30, 2022 | 2,147,483,650% over the limit |
| Flow, in conduit or thru treatment plant | 4 | 8 | 0 | ||
| Chlorine usage | 1 | 8 | 0 | ||
| BOD, 5-day, percent removal | 1 | 7 | 0 | ||
| pH | 4 | 6 | 0 | ||
| E. coli | 4 | 6 | 0 | ||
| Flow rate | 1 | 6 | 0 | ||
| Temperature, water deg. centigrade | 1 | 2 | 0 | ||
| Chlorine, total residual | 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
- 6Single-event violations
| Date | What EPA recorded | Agency |
|---|---|---|
| December 1, 2025 | Reporting Violations - Improper/ Incorrect Reporting | ST6 |
| December 1, 2025 | Reporting Violations - Failure to Notify | ST6 |
| April 1, 2025 | Monitoring Violations - Failure to Monitor for Non-Toxicity Requirements | ST6 |
| April 1, 2025 | Reporting Violations - Improper/ Incorrect Reporting | ST6 |
| October 1, 2023 | Management Practice Violations - Best Management Practice Deficiencies | ST6 |
| November 1, 2020 | Reporting Violations - Failure to submit required report (non-DMR non-pretreatment) | 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
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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 OR0020648 there.
Nearby on the register
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- Every permit record in Oregon, A to Z
Figures from EPA’s ICIS-NPDES download, loaded September 15, 2026.