Clean Water Act discharge permit · NPDES MOG490060
MARTIN MARIETTAMATERIALS GREENWOODQUARRY, Greenwood, MO: NPDES MOG490060 discharge permit, effluent exceedances, inspections, penalties
- EffectivePermit status
- MinorDischarger class
- 5Pollutants under a numeric limit
- 1Pollutants with an effluent exceedance
MARTIN MARIETTAMATERIALS GREENWOODQUARRY, held by Martin Marietta Kansas City LLC, holds NPDES permit MOG490060, which discharges to Tributary To Big Cr.. EPA’s file records it issued August 1, 2022 and expiring April 30, 2027. 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 | MARTIN MARIETTAMATERIALS GREENWOODQUARRY |
|---|---|
| Permittee as filed | Martin Marietta Kansas City LLC |
| NPDES ID | MOG490060 |
| 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 | August 1, 2022 |
| Expiration date | April 30, 2027 |
| Address | Greenwood, MO 64034 |
| Receiving water | Tributary to Big Cr. |
| Subwatershed | Headwaters Big Creek (HUC 102901080302) |
| SIC | 1422 – Crushed And Broken Limestone |
| Other EPA IDs (FRS) | ICIS-AIR source MO0000002903700001 |
Cited to the EPA ICIS-NPDES permit file (ECHO download) and EPA’s NAICS/SIC and component files, the same download; cross-program IDs from EPA’s FRS facility-registry crosswalk.
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 |
|---|---|---|---|---|---|
| Solids, total suspended | 2 | 10 | 6 | September 30, 2024 | 171% over the limit |
| pH | 4 | 4 | 0 | ||
| Solids, settleable | 2 | 4 | 0 | ||
| Oil and grease [soxhlet extr.] tot. | 2 | 4 | 0 | ||
| Flow, in conduit or thru treatment plant | 2 | 4 | 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
- 4Single-event violations
| Date | What EPA recorded | Agency |
|---|---|---|
| January 8, 2026 | Reporting Violations - Failure to submit required report (non-DMR non-pretreatment) | ST6 |
| January 8, 2026 | Effluent Violations - Numeric effluent violation | ST6 |
| January 8, 2026 | Permit Violations - Violation Specified in Comment | ST6 |
| January 8, 2026 | Reporting Violations - Improper/ Incorrect Reporting | 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
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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 MOG490060 there.
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Figures from EPA’s ICIS-NPDES download, loaded October 14, 2026.