Updated Oct 21, 2026

Northrop Grumman Systems Corporation - Promontory

As of Oct 21, 2026, Northrop Grumman Systems Corporation - Promontory in Brigham City, Utah received 145 tons of hazardous waste from off-site in the 2023 Biennial Report and has 8 RCRA violations determined in the last five years.

9160 North Highway 83, Brigham City, Utah 84302

Verified Oct 21, 2026 against U.S. EPA RCRAInfo

Northrop Grumman Systems Corporation - Promontory (EPA ID UTD009081357) is a permitted hazardous-waste treatment, storage and disposal facility in Brigham City, Utah, operated by Northrop Grumman Systems Corporation. Operating permitted units: open burning / detonation, treatment, storage. In the 2023 Biennial Report it received 145 tons of hazardous waste from off-site. EPA waste-code classes received: Reactive waste (D003). Received waste was managed mainly by open burning / detonation. Last on-site inspection: April 7, 2026. In the last five years: 6 inspections, 8 violations, 0 formal enforcement actions and $0 in final penalties. Most cited areas: TSD - General Facility Standards; Generators - General; Listing - General. It is not currently flagged as a significant noncomplier.

Key facts

Facility type	Industrial site receiving off-site waste “Waste management firm” when the primary NAICS code is in waste management and remediation services (562); “industrial site receiving off-site waste” when another industry's site records waste received from off-site in its latest Biennial Report; otherwise an industrial or government site that also holds a TSDF permit. A NAICS code is classification evidence, not proof of whether a facility takes outside business. source, unchanged since Oct 20, 2026
Off-site receipts (latest Biennial Report)	Under 1,000 tons in 2023 Banded tons of hazardous waste received from off-site, with the Biennial Report year (EPA publishes each cycle about two years after it ends). source, unchanged since Oct 19, 2026
Violation record (5 years)	6–20 violations Violations determined in the last five years, banded. A facility with none can still have formal enforcement or penalties in those years for violations determined earlier; its band says so. source, unchanged since Oct 19, 2026
How received waste was managed	Open burning / detonation Management methods reported for the off-site waste it received in the latest Biennial Report (methods used for at least 2% of tons). source, unchanged since Oct 19, 2026
Waste received, by EPA code class	Reactive waste (D003) Main EPA waste-code classes on the off-site waste it reported receiving in the latest Biennial Report: classes with at least 5% of tons received, each waste line's tons split evenly across the classes on it. This is what it took in, not a permit limit. source, unchanged since Oct 19, 2026
Permitted operating units	Open burning / detonation, Treatment, Storage Process types of the facility's current RCRA permit units with an operating legal status. source, unchanged since Oct 19, 2026
Final penalties, last 5 years	0 USD source, unchanged since Oct 19, 2026
Formal enforcement actions, last 5 years	0 source, unchanged since Oct 19, 2026
Last on-site inspection	Apr 7, 2026 Most recent on-site compliance evaluation by EPA or the state (record reviews excluded). source, unchanged since Oct 19, 2026
Significant noncomplier now	No RCRAInfo significant-noncomplier (SNC) flag. source, unchanged since Oct 19, 2026
EPA ID	UTD009081357 source, unchanged since Oct 19, 2026
Operator	Northrop Grumman Systems Corporation source, unchanged since Oct 19, 2026
Owner type	Private source, unchanged since Oct 19, 2026
Land ownership	Private source, unchanged since Oct 20, 2026
Off-site receipt flag (RCRAInfo notification)	Yes source, unchanged since Oct 19, 2026
Commercial TSDF	Yes source, unchanged since Oct 19, 2026
Waste received from off-site	144.9 tons source, unchanged since Oct 19, 2026
Manifests received (e-Manifest, 12 months)	60 source
Tons received on those manifests	311.6 tons source
Shipping sites on those manifests	1 source
Latest manifested receipt	Jul 14, 2026 source
Biennial Report cycle	2023 source, unchanged since Oct 19, 2026
Inspections, last 5 years	6 source, unchanged since Oct 19, 2026
Violations, last 5 years	8 source, unchanged since Oct 19, 2026
Violations not yet returned to compliance	0 source, unchanged since Oct 19, 2026
Violation areas (5 years)	TSD - General Facility Standards, Generators - General, Listing - General source, unchanged since Oct 19, 2026
Universal waste destination facility	No source, unchanged since Oct 19, 2026
Used oil activities	No source, unchanged since Oct 19, 2026
Transfer facility	No source, unchanged since Oct 19, 2026
Recycler	No source, unchanged since Oct 19, 2026
Primary NAICS	336414 source, unchanged since Oct 19, 2026
Why this facility type	Primary NAICS 336414 is not a waste-management code (562), and the 2023 Biennial Report records 144.9 tons received from off-site. source, unchanged since Oct 20, 2026

Source event history

Source dates and first observation are different. A notice is not confirmation that a suspension took effect.

Jul 14, 2026: Received a manifested shipment Official source
Apr 7, 2026: Inspected on site Official source

Dates on this record

Source updated	Oct 18, 2026 (date of the weekly RCRAInfo export read (the whole dataset, not this record))
Collected	Oct 21, 2026, 12:39 PM ET (the last successful check of the source that included this record)
Effective	Received a manifested shipment: Jul 14, 2026; Inspected on site: Apr 7, 2026 (when the source says each fact took effect)
Retired	Not retired: the source is still maintained (whether the dataset is still maintained)

In Utah

7 hazardous waste facilities in the dataset are in Utah; 7 have profiles on this site. Hazardous waste facilities in Utah

Facility type (all 7 here): Waste management firm 5 (71%) · Industrial site receiving off-site waste 2 (29%)

Off-site receipts (latest Biennial Report) (all 7 here): 10,000–100,000 tons in 2023 3 (43%) · 1,000–10,000 tons in 2023 2 (29%) · Under 1,000 tons in 2023 2 (29%)

Violation record (5 years) (all 7 in this group): 6–20 violations (4) · 21+ violations (2) · No violations in 5 years (1)

How received waste was managed (all 7 in this group; a record can count under several values): Storage and transfer (3) · Landfill (2) · Incineration (1) · Open burning / detonation (1)

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TSDF: A facility permitted under RCRA to treat, store or dispose of hazardous waste.

Significant noncomplier: EPA's designation for facilities with serious or chronic RCRA violations. The regulator sets and lifts it, so it can stay on while an enforcement case or compliance schedule is open, even after the individual violations are marked as returned to compliance.

Biennial Report: The national report every two years of hazardous waste generated, managed, shipped and received; tons received are the latest cycle EPA has published.

Off-site receipt flag: What the facility last declared on its RCRA notification form. Facilities re-notify only when something changes, so the flag can be out of date: a facility flagged “No” can still report tons received from off-site in the Biennial Report, which records what it actually received. Where they disagree, the Biennial Report tons are the better evidence.

Formal enforcement: Legally binding actions (orders, consent agreements, civil or criminal cases), as opposed to informal warning letters.

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Something wrong or out of date? Suggest a correction. Source record ID UTD009081357.