Clean Water Act discharge permit · NPDES MD0000078
NORTHROP GRUMMAN SYSTEMS CORPORATION, Cecil County, MD: NPDES MD0000078 discharge permit, effluent exceedances, inspections, penalties
- Administratively continuedPermit status
- MinorDischarger class
- 39Pollutants under a numeric limit
- 5Pollutants with an effluent exceedance
NORTHROP GRUMMAN SYSTEMS CORPORATION, held by ALLIANT TECHSYSTEMS OPERATIOINS, LLC, holds NPDES permit MD0000078, which discharges to Elk River Area. EPA’s file records it issued February 27, 2015 and expiring March 31, 2020. 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 | NORTHROP GRUMMAN SYSTEMS CORPORATION |
|---|---|
| Permittee as filed | ALLIANT TECHSYSTEMS OPERATIOINS, LLC |
| NPDES ID | MD0000078 |
| 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 | February 27, 2015 |
| Expiration date | March 31, 2020 |
| Issuing agency | Maryland Department of The Environment |
| Address | Cecil County, MD 21921 |
| Receiving water | ELK RIVER AREA |
| Receiving water impaired | 303(D) Listed |
| Subwatershed | Little Elk Creek (HUC 020600020202) |
| Other EPA IDs (FRS) | RCRA handler MDD003067121; ICIS-AIR source MD0000002401500055 |
Cited to the EPA ICIS-NPDES permit file (ECHO download); cross-program IDs from EPA’s FRS facility-registry crosswalk.
Effluent limits and exceedances
- 41Pollutants on file
- 39Under a numeric limit
- 14With 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 |
|---|---|---|---|---|---|
| Total purgeable halocarbons | 2 | 5 | 4 | March 31, 2017 | 296% over the limit |
| 1,1-Dichloroethene | 2 | 4 | 3 | March 31, 2017 | 314% over the limit |
| Trichloroethene | 2 | 4 | 3 | March 31, 2017 | 2,120% over the limit |
| Petrol hydrocarbons, total recoverable | 0 | 3 | 3 | March 31, 2009 | 60% over the limit |
| pH | 20 | 23 | 1 | March 31, 2001 | |
| Chlorine, total residual | 20 | 124 | 0 | ||
| Flow, in conduit or thru treatment plant | 24 | 30 | 0 | ||
| Temperature, water deg. fahrenheit | 20 | 11 | 0 | ||
| Temp. diff. between up/down stream deg. F | 10 | 11 | 0 | ||
| Perchlorate [ClO4] | 2 | 6 | 0 | ||
| Carbon tetrachloride | 2 | 1 | 0 | ||
| Benzene | 2 | 1 | 0 | ||
| Vinyl chloride | 2 | 1 | 0 | ||
| Oil & Grease | 0 | 1 | 0 | ||
| Dichlorobromomethane | 2 | 0 | 0 | ||
| Bromoform | 2 | 0 | 0 | ||
| Dibromochloromethane | 2 | 0 | 0 | ||
| Chloroform | 2 | 0 | 0 | ||
| Toluene | 2 | 0 | 0 | ||
| Chlorobenzene | 2 | 0 | 0 | ||
| Chloroethane, total weight | 2 | 0 | 0 | ||
| Ethylbenzene | 2 | 0 | 0 | ||
| Methyl bromide [Bromomethane] | 2 | 0 | 0 | ||
| Methyl chloride [Chloromethane] | 2 | 0 | 0 | ||
| Methylene chloride | 2 | 0 | 0 | ||
| Tetrachloroethylene | 2 | 0 | 0 | ||
| Trichlorofluoromethane | 2 | 0 | 0 | ||
| 1,1-Dichloroethane | 2 | 0 | 0 | ||
| 1,1-Dichloroethylene | 2 | 0 | 0 | ||
| 1,1,1-Trichloroethane | 2 | 0 | 0 | ||
| 1,1,2-Trichloroethane | 2 | 0 | 0 | ||
| 1,1,2,2-Tetrachloroethane | 2 | 0 | 0 | ||
| 1,2-Dichloroethane, total weight | 2 | 0 | 0 | ||
| 1,2-Dichlorobenzene | 2 | 0 | 0 | ||
| 1,2-Dichloropropane | 2 | 0 | 0 | ||
| trans-1,2-Dichloroethylene | 2 | 0 | 0 | ||
| 1,3-Dichlorobenzene | 2 | 0 | 0 | ||
| 1,4-Dichlorobenzene | 2 | 0 | 0 | ||
| 2-Chloroethyl vinyl ether, [mixed] | 2 | 0 | 0 | ||
| trans-1,3-Dichloropropene | 2 | 0 | 0 | ||
| cis-1,3-Dichloropropene | 2 | 0 | 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 MD0000078.
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 MD0000078 there.
Nearby on the register
Figures from EPA’s ICIS-NPDES download, loaded September 15, 2026.