Clean Water Act discharge permit · NPDES MO0043532
ORAN WWTF, Oran, MO: NPDES MO0043532 discharge permit, effluent exceedances, inspections, penalties
- Administratively continuedPermit status
- MinorDischarger class
- 15Pollutants under a numeric limit
- 3Pollutants with an effluent exceedance
ORAN WWTF, held by City of Oran, holds NPDES permit MO0043532, which discharges to Tributary To Ditch #1. EPA’s file records it issued August 16, 2016 and expiring September 30, 2020. The status and dates are as EPA’s permit file stood when Velarion loaded it (September 14, 2026); EPA’s free Detailed Facility Report on ECHO carries the permit’s current standing.
Identity
| Facility as filed | ORAN WWTF |
|---|---|
| Permittee as filed | City of Oran |
| NPDES ID | MO0043532 |
| 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 16, 2016 |
| Expiration date | September 30, 2020 |
| Address | Oran, MO 63771 |
| Receiving water | Tributary to Ditch #1 |
| Subwatershed | City of Oran (HUC 080202040602) |
Cited to the EPA ICIS-NPDES permit file (ECHO download).
Effluent limits and exceedances
- 23Pollutants on file
- 15Under a numeric limit
- 20With 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 |
|---|---|---|---|---|---|
| BOD, 5-day, 20 deg. C | 3 | 33 | 15 | April 30, 2016 | 93% over the limit |
| Solids, total suspended | 3 | 29 | 11 | September 30, 2016 | 76% over the limit |
| pH | 1 | 41 | 5 | August 31, 2015 | |
| Spray irrigation | 2 | 23 | 0 | ||
| Nitrogen, ammonia total [as N] | 6 | 22 | 0 | ||
| Application rate area sprayed | 2 | 20 | 0 | ||
| Phosphorus, total [as P] | 2 | 18 | 0 | ||
| Nitrogen, Kjeldahl, total [as N] | 0 | 18 | 0 | ||
| Nitrite + Nitrate total [as N] | 0 | 18 | 0 | ||
| Oil and grease [soxhlet extr.] tot. | 2 | 14 | 0 | ||
| Flow, in conduit or thru treatment plant | 2 | 14 | 0 | ||
| Application rate, gallons spray irrigation | 2 | 14 | 0 | ||
| Spray irrigation, application rate | 2 | 14 | 0 | ||
| Depth to water level ft below landsurface | 0 | 7 | 0 | ||
| E. coli | 8 | 6 | 0 | ||
| Flow rate | 0 | 6 | 0 | ||
| Flow, gallons/batch | 0 | 6 | 0 | ||
| BOD, 5-day, percent removal | 0 | 5 | 0 | ||
| Solids, suspended percent removal | 0 | 5 | 0 | ||
| Rainfall | 0 | 3 | 0 | ||
| Nitrogen, total [as N] | 2 | 0 | 0 | ||
| Toxicity [acute], Ceriodaphnia dubia | 1 | 0 | 0 | ||
| Toxicity [acute], Pimephales promelas [Fathead Minnow] | 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
- 10Single-event violations
| Date | What EPA recorded | Agency |
|---|---|---|
| October 31, 2025 | Permit Violations - Violation Specified in Comment | ST6 |
| July 8, 2024 | Permit Violations - Violation Specified in Comment | ST6 |
| May 6, 2022 | Reporting Violations - Improper/ Incorrect Reporting | ST6 |
| March 17, 2022 | Reporting Violations - Improper/ Incorrect Reporting | ST6 |
| June 30, 2021 | Reporting Violations - Failure to Submit DMRs | ST6 |
| March 18, 2021 | Reporting Violations - Failure to Submit DMRs | ST6 |
| June 22, 2020 | Reporting Violations - Improper/ Incorrect Reporting | ST6 |
| April 6, 2020 | Reporting Violations - Failure to Submit DMRs | ST6 |
| December 20, 2019 | Reporting Violations - Failure to submit required report (non-DMR non-pretreatment) | ST6 |
| March 22, 2017 | Permit Violations - Violation Specified in Comment | 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.
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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 MO0043532 there.
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Figures from EPA’s ICIS-NPDES download, loaded September 14, 2026.