Clean Water Act discharge permit · NPDES MO0099856
OSBORN WWTF, Osborn, MO: NPDES MO0099856 discharge permit, effluent exceedances, inspections, penalties
- Administratively continuedPermit status
- MinorDischarger class
- 11Pollutants under a numeric limit
- 5Pollutants with an effluent exceedance
OSBORN WWTF, held by City of Osborn, holds NPDES permit MO0099856, which discharges to Tributary To Grindstone Creek. EPA’s file records it issued February 24, 2017 and expiring December 31, 2021. 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 | OSBORN WWTF |
|---|---|
| Permittee as filed | City of Osborn |
| NPDES ID | MO0099856 |
| 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 | February 24, 2017 |
| Expiration date | December 31, 2021 |
| Address | Osborn, MO 64474 |
| Receiving water | Tributary to Grindstone Creek |
| Subwatershed | Wheeler Creek-Grindstone Creek (HUC 102801010701) |
Cited to the EPA ICIS-NPDES permit file (ECHO download).
Effluent limits and exceedances
- 12Pollutants on file
- 11Under 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 |
|---|---|---|---|---|---|
| Solids, total suspended | 2 | 114 | 62 | April 30, 2026 | 471% over the limit |
| Solids, suspended percent removal | 1 | 32 | 16 | May 31, 2026 | 185% over the limit |
| BOD, 5-day, 20 deg. C | 2 | 65 | 13 | June 30, 2022 | 468% over the limit |
| BOD, 5-day, percent removal | 1 | 26 | 10 | June 30, 2026 | 158% over the limit |
| Oil and grease [soxhlet extr.] tot. | 2 | 37 | 5 | January 31, 2023 | 93% over the limit |
| pH | 1 | 48 | 0 | ||
| Flow, in conduit or thru treatment plant | 2 | 38 | 0 | ||
| Nitrogen, ammonia total [as N] | 2 | 32 | 0 | ||
| E. coli | 2 | 18 | 0 | ||
| Temperature, water deg. centigrade | 0 | 4 | 0 | ||
| Toxicity [acute], Ceriodaphnia dubia | 1 | 1 | 0 | ||
| Toxicity [acute], Pimephales promelas [Fathead Minnow] | 1 | 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
- 7Single-event violations
| Date | What EPA recorded | Agency |
|---|---|---|
| March 31, 2023 | Reporting Violations - Improper/ Incorrect Reporting | ST6 |
| March 31, 2023 | Permit Violations - Violation Specified in Comment | ST6 |
| March 31, 2023 | Reporting Violations - Failure to submit required report (non-DMR non-pretreatment) | ST6 |
| March 29, 2021 | Effluent Violations - Numeric effluent violation | ST6 |
| September 26, 2018 | Reporting Violations - Failure to Submit DMRs | ST6 |
| March 24, 2017 | Reporting Violations - Failure to Submit DMRs | ST6 |
| March 24, 2017 | 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.
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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 MO0099856 there.
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Figures from EPA’s ICIS-NPDES download, loaded September 14, 2026.