Clean Water Act discharge permit · NPDES MONX00419
NORTHROP GRUMMAN CUTTING EDGE OPTRONICS, St. Charles, MO: NPDES MONX00419 discharge permit, effluent exceedances, inspections, penalties
- Administratively continuedPermit status
- MinorDischarger class
- 0Pollutants under a numeric limit
- 0Pollutants with an effluent exceedance
NORTHROP GRUMMAN CUTTING EDGE OPTRONICS, held by Undefined, holds NPDES permit MONX00419. EPA’s file records it issued April 1, 2021 and expiring March 31, 2026. 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.
What the register holds for NORTHROP GRUMMAN CUTTING EDGE OPTRONICS: its NPDES ID, its permit type and status, its dates, its address in St. Charles, Missouri. EPA’s effluent violation file and its single-event violation file hold no violation for NPDES MONX00419.
Identity
| Facility as filed | NORTHROP GRUMMAN CUTTING EDGE OPTRONICS |
|---|---|
| Permittee as filed | Undefined |
| NPDES ID | MONX00419 |
| Permit status | Administratively continued (past its expiration date and still in force until reissued) |
| Permit type | Individual permit |
| Discharger class | Minor discharger |
| Facility type | Not a publicly owned treatment works |
| Issued | April 1, 2021 |
| Expiration date | March 31, 2026 |
| Address | St. Charles, MO 63301 |
| Subwatershed | Lower Dardenne Creek (HUC 071100090105) |
| NAICS | 334413 – Semiconductor and Related Device Manufacturing |
| SIC | 3674 – Semiconductors And Related Devices |
| Other EPA IDs (FRS) | RCRA handler MOR000005025; ICIS-AIR source MO0000002918300160 |
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
- 0Pollutants on file
- 0Under a numeric limit
- 0With a violation of any kind
- 0With an effluent exceedance
EPA’s limits and effluent violation files hold no pollutant row for NPDES MONX00419.
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 MONX00419.
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, MONX00419.
Start the watch
- One permit holder — $99/month
- One watershed — $2,990/year
- One state — $4,990/year
- The whole register — $18,000/year
How we handle your data → Privacy
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 MONX00419 there.
Nearby on the register
- Discharge permits in St. Charles
- Every permit record in St. Charles, A to Z
- Discharge permits in Missouri
- Every permit record in Missouri, A to Z
Figures from EPA’s ICIS-NPDES download, loaded October 14, 2026.