Clean Water Act discharge permit · NPDES MOG490959
SEMO OPERATING COMPANY, Jackson, MO: NPDES MOG490959 discharge permit, effluent exceedances, inspections, penalties
- EffectivePermit status
- MinorDischarger class
- 5Pollutants under a numeric limit
- 1Pollutants with an effluent exceedance
SEMO OPERATING COMPANY, held by SEMO Operating Company LLC, holds NPDES permit MOG490959, which discharges to 8-20-13 Mudd V1.0. EPA’s file records it issued May 1, 2017 and expiring April 30, 2022. 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 | SEMO OPERATING COMPANY |
|---|---|
| Permittee as filed | SEMO Operating Company LLC |
| NPDES ID | MOG490959 |
| Permit status | Effective |
| Permit type | Coverage under a general permit |
| Discharger class | Minor discharger |
| Facility type | Not a publicly owned treatment works |
| Program | Industrial stormwater |
| Issued | May 1, 2017 |
| Expiration date | April 30, 2022 |
| Issuing agency | MODNR-Southeast Regional Office |
| Address | Jackson, MO 63755 |
| Receiving water | 8-20-13 MUDD V1.0 |
| Subwatershed | Cane Creek (HUC 071401070508) |
Cited to the EPA ICIS-NPDES permit file (ECHO download).
Effluent limits and exceedances
- 5Pollutants on file
- 5Under a numeric limit
- 5With 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 |
|---|---|---|---|---|---|
| Oil and grease [soxhlet extr.] tot. | 4 | 21 | 1 | September 30, 2006 | 67% over the limit |
| pH | 4 | 20 | 0 | ||
| Solids, total suspended | 4 | 20 | 0 | ||
| Solids, settleable | 4 | 20 | 0 | ||
| Flow, in conduit or thru treatment plant | 4 | 20 | 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
- 0Single-event violations
EPA’s single-event violation file, as loaded, holds no violation for NPDES MOG490959.
Velarion’s copy of EPA’s ICIS-NPDES files does not yet 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 MOG490959 there.
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Figures from EPA’s ICIS-NPDES download, loaded September 15, 2026.