Clean Water Act discharge permit · NPDES OR0020541
CARLTON STP, Carlton, OR: NPDES OR0020541 discharge permit, effluent exceedances, inspections, penalties
- Administratively continuedPermit status
- MinorDischarger class
- 0Pollutants under a numeric limit
- 4Pollutants with an effluent exceedance
CARLTON STP, held by CARLTON, CITY OF, holds NPDES permit OR0020541, which discharges to N. Yamhill River. EPA’s file records it issued December 29, 2005 and expiring December 31, 2009. 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 | CARLTON STP |
|---|---|
| Permittee as filed | CARLTON, CITY OF |
| NPDES ID | OR0020541 |
| 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 | December 29, 2005 |
| Expiration date | December 31, 2009 |
| Address | Carlton, OR 97111 |
| Receiving water | N. YAMHILL RIVER |
| Receiving water impaired | 303(D) Listed |
| Subwatershed | Lower North Yamhill River (HUC 170900080608) |
| 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
- 9Pollutants on file
- 0Under a numeric limit
- 9With a violation of any kind
- 4With 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 | 0 | 85 | 26 | March 31, 2026 | 1,466% over the limit |
| Solids, total suspended | 0 | 55 | 12 | November 30, 2025 | 1,325% over the limit |
| BOD, 5-day, percent removal | 0 | 12 | 11 | November 30, 2025 | 2,733% over the limit |
| Solids, suspended percent removal | 0 | 3 | 3 | February 28, 2025 | 1,506% over the limit |
| E. coli | 0 | 30 | 0 | ||
| Chlorine, total residual | 0 | 8 | 0 | ||
| Temperature, water deg. centigrade | 0 | 3 | 0 | ||
| pH | 0 | 2 | 0 | ||
| Chlorine usage | 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
- 6Single-event violations
| Date | What EPA recorded | Agency |
|---|---|---|
| November 1, 2024 | Reporting Violations - Improper/ Incorrect Reporting | ST6 |
| September 26, 2023 | Management Practice Violations - Best Management Practice Deficiencies | ST6 |
| May 1, 2023 | Monitoring Violations - Frequency of Sampling Violation | ST6 |
| November 1, 2022 | Monitoring Violations - Failure to Monitor for Non-Toxicity Requirements | ST6 |
| December 1, 2021 | Reporting Violations - Failure to Submit DMRs | ST6 |
| July 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, OR0020541.
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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 OR0020541 there.
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Figures from EPA’s ICIS-NPDES download, loaded October 14, 2026.