Clean Water Act discharge permit · NPDES OR0020320
CHILOQUIN STP, Chiloquin, OR: NPDES OR0020320 discharge permit, effluent exceedances, inspections, penalties
- Administratively continuedPermit status
- MinorDischarger class
- 0Pollutants under a numeric limit
- 1Pollutants with an effluent exceedance
CHILOQUIN STP, held by CHILOQUIN, CITY OF, holds NPDES permit OR0020320, which discharges to Williamson River. EPA’s file records it issued August 10, 2004 and expiring July 31, 2009. 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 | CHILOQUIN STP |
|---|---|
| Permittee as filed | CHILOQUIN, CITY OF |
| NPDES ID | OR0020320 |
| 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 | August 10, 2004 |
| Expiration date | July 31, 2009 |
| Address | Chiloquin, OR 97624 |
| Receiving water | WILLIAMSON RIVER |
| Subwatershed | Copperfield Draw (HUC 180102020712) |
Cited to the EPA ICIS-NPDES permit file (ECHO download).
Effluent limits and exceedances
- 8Pollutants on file
- 0Under a numeric limit
- 8With a violation of any kind
- 1With 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 |
|---|---|---|---|---|---|
| Phosphorus, total [as P] | 0 | 3 | 1 | May 31, 2023 | 4% over the limit |
| Solids, total suspended | 0 | 5 | 0 | ||
| Temperature, water deg. fahrenheit | 0 | 3 | 0 | ||
| Excess thermal load | 0 | 3 | 0 | ||
| E. coli | 0 | 2 | 0 | ||
| Phosphorus, Total | 0 | 2 | 0 | ||
| BOD, 5-day, 20 deg. C | 0 | 1 | 0 | ||
| Nitrogen, ammonia total [as N] | 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
- 9Single-event violations
| Date | What EPA recorded | Agency |
|---|---|---|
| January 1, 2023 | Reporting Violations - Failure to Submit DMRs | ST6 |
| January 1, 2023 | Reporting Violations - Improper/ Incorrect Reporting | ST6 |
| January 1, 2023 | Reporting Violations - Failure to submit required report (non-DMR non-pretreatment) | ST6 |
| November 1, 2020 | Reporting Violations - Improper/ Incorrect Reporting | ST6 |
| February 5, 2019 | Reporting Violations - Failure to submit required report (non-DMR non-pretreatment) | ST6 |
| January 1, 2019 | Effluent Violations - Numeric effluent violation | ST6 |
| October 1, 2018 | Effluent Violations - Numeric effluent violation | ST6 |
| May 1, 2018 | Effluent Violations - Numeric effluent violation | ST6 |
| March 1, 2018 | Effluent Violations - Numeric effluent violation | 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, OR0020320.
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 OR0020320 there.
Nearby on the register
Figures from EPA’s ICIS-NPDES download, loaded September 15, 2026.