Clean Water Act discharge permit · NPDES MD0072222
NORTHGROP GRUMMAN SYSTEMS CORPORATION- DEEP OCEAN TEST, Annapolis, MD: NPDES MD0072222 discharge permit, effluent exceedances, inspections, penalties
- Administratively continuedPermit status
- MinorDischarger class
- 2Pollutants under a numeric limit
- 1Pollutants with an effluent exceedance
NORTHGROP GRUMMAN SYSTEMS CORPORATION- DEEP OCEAN TEST, held by Northrop Grumman Systems Corporation, holds NPDES permit MD0072222. EPA’s file records it issued September 1, 2021 and expiring August 31, 2025. 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 | NORTHGROP GRUMMAN SYSTEMS CORPORATION- DEEP OCEAN TEST |
|---|---|
| Permittee as filed | Northrop Grumman Systems Corporation |
| NPDES ID | MD0072222 |
| 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 | September 1, 2021 |
| Expiration date | August 31, 2025 |
| Issuing agency | Maryland Department Environment |
| Address | Annapolis, MD 21402 |
| Receiving water impaired | 303(D) Listed |
| Subwatershed | Whitehall Creek-Severn River-Chesapeake Bay (HUC 020600040203) |
| Other EPA IDs (FRS) | RCRA handler MDR000511808 |
Cited to the EPA ICIS-NPDES permit file (ECHO download); cross-program IDs from EPA’s FRS facility-registry crosswalk.
Effluent limits and exceedances
- 2Pollutants on file
- 2Under a numeric limit
- 2With 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 |
|---|---|---|---|---|---|
| Temp. diff. between intake and discharge | 2 | 2 | 1 | December 31, 2022 | 2,147,483,650% over the limit |
| Flow | 4 | 2 | 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 MD0072222.
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, MD0072222.
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 MD0072222 there.
Nearby on the register
- Discharge permits in Annapolis
- Every permit record in Annapolis, A to Z
- Discharge permits in Maryland
- Every permit record in Maryland, A to Z
Figures from EPA’s ICIS-NPDES download, loaded September 15, 2026.