Clean Water Act discharge permit · NPDES OR0022403
NORTH POWDER STP, North Powder, OR: NPDES OR0022403 discharge permit, effluent exceedances, inspections, penalties
- Administratively continuedPermit status
- MinorDischarger class
- 12Pollutants under a numeric limit
- 8Pollutants with an effluent exceedance
NORTH POWDER STP, held by NORTH POWDER, CITY OF, holds NPDES permit OR0022403, which discharges to North Powder River. EPA’s file records it issued April 25, 2018 and expiring March 31, 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 | NORTH POWDER STP |
|---|---|
| Permittee as filed | NORTH POWDER, CITY OF |
| NPDES ID | OR0022403 |
| 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 | April 25, 2018 |
| Expiration date | March 31, 2023 |
| Issuing agency | Oregon DEQ |
| Address | North Powder, OR 97867 |
| Receiving water | NORTH POWDER RIVER |
| Subwatershed | Lower North Powder River (HUC 170502030505) |
Cited to the EPA ICIS-NPDES permit file (ECHO download).
Effluent limits and exceedances
- 18Pollutants on file
- 12Under a numeric limit
- 18With a violation of any kind
- 8With 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 | 31 | 28 | May 31, 2023 | 6,050% over the limit |
| BOD, 5-day, 20 deg. C | 6 | 29 | 14 | January 31, 2023 | 286% over the limit |
| pH | 4 | 24 | 10 | May 31, 2023 | |
| Solids, suspended percent removal | 1 | 8 | 7 | April 30, 2023 | 118% over the limit |
| Solids, total suspended | 6 | 18 | 4 | December 31, 2022 | 75% over the limit |
| E. coli | 4 | 8 | 4 | January 31, 2023 | 496% over the limit |
| BOD, 5-day, percent removal | 1 | 5 | 4 | December 31, 2022 | 83% over the limit |
| Flow, total | 1 | 3 | 1 | July 31, 2020 | 2,147,483,650% over the limit |
| Flow, in conduit or thru treatment plant | 4 | 14 | 0 | ||
| Temperature, water deg. centigrade | 1 | 2 | 0 | ||
| Chlorine, total residual | 4 | 1 | 0 | ||
| Chlorine usage | 1 | 1 | 0 | ||
| Oxygen, dissolved [DO] | 0 | 1 | 0 | ||
| Oil & Grease | 0 | 1 | 0 | ||
| Nitrogen, Kjeldahl, total [as N] | 0 | 1 | 0 | ||
| Nitrite + Nitrate total [as N] | 0 | 1 | 0 | ||
| Phosphorus, total [as P] | 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
- 19Single-event violations
| Date | What EPA recorded | Agency |
|---|---|---|
| November 15, 2025 | Reporting Violations - Failure to Notify | ST6 |
| January 1, 2025 | Monitoring Violations - Failure to Monitor for Non-Toxicity Requirements | ST6 |
| May 1, 2024 | Monitoring Violations - Failure to Monitor for Non-Toxicity Requirements | ST6 |
| May 1, 2024 | Reporting Violations - Improper/ Incorrect Reporting | ST6 |
| December 1, 2022 | Monitoring Violations - Frequency of Sampling Violation | ST6 |
| August 15, 2022 | Reporting Violations - Failure to submit required report (non-DMR non-pretreatment) | ST6 |
| April 21, 2022 | Management Practice Violations - Best Management Practice Deficiencies | ST6 |
| December 31, 2021 | Monitoring Violations - Frequency of Sampling Violation | ST6 |
| December 15, 2021 | Monitoring Violations - Frequency of Sampling Violation | ST6 |
| December 1, 2021 | Monitoring Violations - Failure to Monitor for Non-Toxicity Requirements | ST6 |
| November 1, 2021 | Monitoring Violations - Invalid/Unrepresentative Sample | ST6 |
| November 1, 2021 | Reporting Violations - Improper/ Incorrect Reporting | ST6 |
| October 1, 2020 | Reporting Violations - Improper/ Incorrect Reporting | ST6 |
| May 15, 2020 | Reporting Violations - Failure to submit required report (non-DMR non-pretreatment) | ST6 |
| May 15, 2020 | Permit Violations - Violation Specified in Comment | ST6 |
| May 1, 2019 | Reporting Violations - Improper/ Incorrect Reporting | ST6 |
| April 2, 2019 | Reporting Violations - Failure to submit required report (non-DMR non-pretreatment) | ST6 |
| March 1, 2019 | Effluent Violations - Numeric effluent violation | ST6 |
| October 1, 2018 | Reporting Violations - Failure to Submit DMRs | 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 OR0022403 there.
Nearby on the register
Figures from EPA’s ICIS-NPDES download, loaded September 15, 2026.