Clean Water Act discharge permit · NPDES UT0024805
NORTHROP GRUMMAN SYSTEMS, Brigham City, UT: NPDES UT0024805 discharge permit, effluent exceedances, inspections, penalties
- Administratively continuedPermit status
- MajorDischarger class
- 34Pollutants under a numeric limit
- 7Pollutants with an effluent exceedance
NORTHROP GRUMMAN SYSTEMS, held by Northrop Grumman Corporation, holds NPDES permit UT0024805, which discharges to Blue Creek. EPA’s file records it issued March 29, 2017 and expiring March 31, 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 | NORTHROP GRUMMAN SYSTEMS |
|---|---|
| Permittee as filed | Northrop Grumman Corporation |
| NPDES ID | UT0024805 |
| Permit status | Administratively continued (past its expiration date and still in force until reissued) |
| Permit type | Individual permit |
| Discharger class | Major discharger |
| Facility type | Not a publicly owned treatment works |
| Program | Industrial stormwater |
| Issued | March 29, 2017 |
| Expiration date | March 31, 2022 |
| Issuing agency | Utah State DEQ Division of Water Quality |
| Address | Brigham City, UT 84302 |
| Receiving water | BLUE CREEK |
| Receiving water impaired | 303(D) Listed |
| Subwatershed | Engineer Spring-Blue Creek (HUC 160203090806) |
| Other EPA IDs (FRS) | RCRA handler UTD009081357; ICIS-AIR source UT0000004900300003 |
Cited to the EPA ICIS-NPDES permit file (ECHO download); cross-program IDs from EPA’s FRS facility-registry crosswalk.
Effluent limits and exceedances
- 36Pollutants on file
- 34Under a numeric limit
- 16With a violation of any kind
- 7With 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 | 4 | 3 | 3 | December 31, 2024 | 29% over the limit |
| BOD, 5-day, 20 deg. C | 4 | 2 | 2 | April 30, 2005 | 111% over the limit |
| Isopropanol | 8 | 4 | 1 | June 30, 2009 | 49% over the limit |
| Nitrogen, ammonia total [as N] | 16 | 1 | 1 | November 30, 2020 | 47% over the limit |
| Volatile fraction organics [EPA 624] | 12 | 1 | 1 | April 30, 2015 | 380% over the limit |
| Oxygen, dissolved [DO] | 2 | 1 | 1 | June 30, 2010 | 100% over the limit |
| Coliform, fecal general | 0 | 1 | 1 | June 30, 2006 | 5% over the limit |
| Coliform, total general | 0 | 14 | 0 | ||
| E. coli | 4 | 2 | 0 | ||
| Flow rate | 2 | 2 | 0 | ||
| Mercury, total recoverable | 2 | 2 | 0 | ||
| Chemical Oxygen Demand [COD] | 2 | 2 | 0 | ||
| %Effect Static Renewal 48Hr Acute D. magna | 2 | 2 | 0 | ||
| Silver total recoverable | 2 | 1 | 0 | ||
| Oil and grease | 2 | 1 | 0 | ||
| Perchlorate [ClO4] | 2 | 1 | 0 | ||
| Solids, total dissolved | 8 | 0 | 0 | ||
| pH | 4 | 0 | 0 | ||
| Nitrogen, Kjeldahl, total [as N] | 4 | 0 | 0 | ||
| Phosphorus, total [as P] | 4 | 0 | 0 | ||
| Sulfate, total [as SO4] | 4 | 0 | 0 | ||
| Nickel, total [as Ni] | 4 | 0 | 0 | ||
| Nitrogen, nitrate total [as NO3] | 4 | 0 | 0 | ||
| Nitrogen, nitrite total [as NO2] | 4 | 0 | 0 | ||
| Copper, total recoverable | 3 | 0 | 0 | ||
| Ozone - residual | 2 | 0 | 0 | ||
| Nitrite + Nitrate total [as N] | 2 | 0 | 0 | ||
| Arsenic, total recoverable | 2 | 0 | 0 | ||
| Selenium, total recoverable | 2 | 0 | 0 | ||
| Chromium, total [as Cr] | 2 | 0 | 0 | ||
| Lead, total [as Pb] | 2 | 0 | 0 | ||
| Zinc, total recoverable | 2 | 0 | 0 | ||
| Aluminum, total recoverable | 2 | 0 | 0 | ||
| Cadmium, total recoverable | 2 | 0 | 0 | ||
| Phosphate, ortho [as P] | 2 | 0 | 0 | ||
| %Effect Static Renewal 96Hr Acute Pimephales promelas | 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 UT0024805.
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 UT0024805 there.
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Figures from EPA’s ICIS-NPDES download, loaded September 15, 2026.