Northrop Grumman Corp
15 facilities · 5 states · 1.8M lbs total releases
According to the EPA Toxics Release Inventory, Northrop Grumman Corp is the reported parent of 15 Form R facilities across 5 states, disclosing 1.8M lbs of toxic releases. 5 of 41 reported chemicals carry a carcinogen classification in the TRI extract. The heaviest-reporting state by release volume is Utah (1.3M lbs). Those TRI figures remain self-reported disclosure pounds for Northrop Grumman Corp, including carcinogen-flagged substances, not a measured public-health risk score.
Release-over-release change
What changed for Northrop Grumman Corp: EPA TRI 2023 reporting year
Same facilities, both years
-58.8%
11 facilities that filed in 2022 and 2023
Whole inventory
-59.4%
457.1 thousand lb → 185.3 thousand lb, every facility that filed
Between the two reporting years, 1 facility filed for the first time and 1 stopped filing. Facilities entering or leaving the inventory are excluded from the same-facility comparison above.
- Northrop Grumman Corp's total reported releases fell from 450.0 thousand lb in 2022 to 185.3 thousand lb in 2023, based on EPA TRI filings.
- Northrop Grumman Corp's air releases fell from 394.1 thousand lb in 2022 to 126.0 thousand lb in 2023, based on EPA TRI filings.
- Northrop Grumman Corp's land releases rose from 25.4 thousand lb in 2022 to 34.3 thousand lb in 2023, based on EPA TRI filings.
- Northrop Grumman Corp's chemicals reported rose from 18 in 2022 to 22 in 2023, based on EPA TRI filings.
TRI parent disclosure trail
Read Northrop Grumman Corp from filing to facility
Largest Form R sites under this parent: Northrop Grumman Systems Corp - Promontory; Northrop Grumman Systems Corp (new River Energetics); Allegany Ballistics Lab (nirop); Northrop Grumman Systems Corp - Bacchus. Neighbor parents on the disclosure ladder: Clean Harbors Inc; The Renco Group Inc; Hexcel Corp. Largest disclosed chemicals by pounds: Hydrochloric acid (acid aerosols including mists, vapors, gas, fog, and other airborne forms of any particle size); Aluminum (fume or dust); Nitroglycerin; Nitric acid; Nitrate compounds (water dissociable; reportable only when in aqueous solution). Heaviest-reporting states in this extract: Utah; Virginia; West Virginia. Industry labels on the parent rollup: Transportation Equipment; Chemicals; Computers and Electronic Products; Machinery. Start from those named sites and neighbors rather than a generic parent blurb; pounds stay disclosure, not risk.
Source: U.S. Environmental Protection Agency, TRI Basic Data Files Toxics Release Inventory (TRI) · August 2026
Largest Form R sites under this parent: Northrop Grumman Systems Corp - Promontory; Northrop Grumman Systems Corp (new River Energetics); Allegany Ballistics Lab (nirop); Northrop Grumman Systems Corp - Bacchus. Neighbor parents on the disclosure ladder: Clean Harbors Inc; The Renco Group Inc; Hexcel Corp. Largest disclosed chemicals by pounds: Hydrochloric acid (acid aerosols including mists, vapors, gas, fog, and other airborne forms of any particle size); Aluminum (fume or dust); Nitroglycerin; Nitric acid; Nitrate compounds (water dissociable; reportable only when in aqueous solution). Heaviest-reporting states in this extract: Utah; Virginia; West Virginia. Industry labels on the parent rollup: Transportation Equipment; Chemicals; Computers and Electronic Products; Machinery.
Northrop Grumman Corp ranks #494 of 4,988 slug-merged TRI parents, a smaller disclosed-volume parent relative to the national Form R parent set. Northrop Grumman Corp files across 5 states, a regional parent portfolio rather than a single-state discloser. Releases are facility-concentrated: Northrop Grumman Systems Corp - Promontory accounts for most of Northrop Grumman Corp's disclosed pounds, so peer comparisons should weight that site, not an even portfolio average.
Parent aggregation for Northrop Grumman Corp follows facility-reported names. Compare the named neighbors (Clean Harbors Inc; The Renco Group Inc; Hexcel Corp) before treating rank as a hazard score; TRI stays self-reported and unweighted by toxicity.
Where Northrop Grumman Corp sits among TRI parents
Northrop Grumman Corp sits on a disclosure ladder beside Clean Harbors Inc and The Renco Group Inc and Hexcel Corp. Open those parents for a different facility count, state span, and chemical mix.
Higher disclosed volume
- Clean Harbors Inc · rank #492 · 45.7M lbs
- The Renco Group Inc · rank #493 · 27.6M lbs
Lower disclosed volume
- Hexcel Corp · rank #495 · 1.6M lbs
Largest chemicals disclosed by Northrop Grumman Corp
Hydrochloric acid (acid aerosols including mists, vapors, gas, fog, and other airborne forms of any particle size); Aluminum (fume or dust); Nitroglycerin; Nitric acid; Nitrate compounds (water dissociable; reportable only when in aqueous solution) lead the Form R pound rollup for this parent, including filings such as Northrop Grumman Systems Corp - Promontory. Pound totals, not toxicity-weighted risk.
| Chemical | Disclosed lbs |
|---|---|
| Hydrochloric acid (acid aerosols including mists, vapors, gas, fog, and other airborne forms of any particle size) | 1.1M lbs |
| Aluminum (fume or dust) | 329.8K lbs |
| Nitroglycerin | 176.2K lbs |
| Nitric acid | 29.5K lbs |
| Nitrate compounds (water dissociable; reportable only when in aqueous solution) | 27.8K lbs |
Where does this company operate?
| State | Facilities | Total Releases |
|---|---|---|
| Utah | 4 | 1.3M lbs |
| Virginia | 2 | 224.1K lbs |
| West Virginia | 1 | 166.8K lbs |
| Maryland | 4 | 57.9K lbs |
| California | 4 | 21.9K lbs |
Facilities (15)
| Facility | Releases |
|---|---|
| Northrop Grumman Systems Corp - Promontory Promontory, UT | 1.2M lbs |
| Northrop Grumman Systems Corp (new River Energetics) Radford, VA | 224.0K lbs |
| Allegany Ballistics Lab (nirop) Rocket Center, WV | 166.8K lbs |
| Northrop Grumman Systems Corp - Bacchus Magna, UT | 47.7K lbs |
| Northrop Grumman Systems Corp Linthicum Heights, MD | 32.9K lbs |
| Northrop Grumman Systems Corp Linthicum, MD | 24.8K lbs |
| Northrop Grumman el Segundo El Segundo, CA | 18.0K lbs |
| Northrop Grumman Systems Corp Sunnyvale, CA | 3.6K lbs |
| Northrop Grumman Systems Corporation Manhattan Beach, CA | 280 lbs |
| Undersea Systems Annapolis, MD | 167 lbs |
| Northrop Grumman Systems Corp Charlottesville, VA | 43 lbs |
| Northrop Grumman Systems Corp Redondo Beach, CA | 10 lbs |
| Northrop Grumman Systems Coporation Salt Lake City, UT | 5 lbs |
| Northrop Grumman Systems Corp. - Troy Hill 4 Elkridge, MD | 0 lbs |
| Northrop Grumman Systems Corp Aeronautics Systems Clearfield, UT | 0 lbs |
Frequently Asked Questions
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Compare beyond the release ladder
Nationwide peers by disclosed pounds & facility count
Cross-portfolio TRI parents nearest Northrop Grumman Corp on total disclosed release pounds (1.8M lbs) and reporting facility count (15). Release-volume peers include US Tennessee Valley Authority, Veolia N.a. Inc., Pepsico Inc. Facility-count peers include Bae Systems Inc, Bridgestone Americas Inc, Clarios LLC. Neighborhoods are forced disjoint so each axis surfaces a different set of parents.
Similar disclosed release pounds
Nearest parents (≥3 facilities, ≥10k lbs) by absolute TRI disclosed pounds, not rank-adjacent ladder neighbors.
Similar facility count
Nearest parents by reporting-site count (deduped against the release-pound neighborhood).
About This Data
EPA TRI parent totals cover all media. This extract's heaviest states for the parent are Utah, Virginia, West Virginia; facility-reported names can vary across subsidiaries.
Source: U.S. Environmental Protection Agency, TRI Basic Data Files
What to do with Northrop Grumman Corp's TRI parent record
From Northrop Grumman Corp, open Northrop Grumman Systems Corp - Promontory or compare against Clean Harbors Inc rather than reading rank alone.
- Open the largest Form R site for Northrop Grumman Corp (Northrop Grumman Systems Corp - Promontory in UT). Largest facility
- Compare against The Renco Group Inc, the next-higher disclosed-volume parent. Higher-volume parent
- Browse the full parent release ranking to see where Northrop Grumman Corp sits among all slug-merged TRI parents. All parent companies
Rank and peers (Clean Harbors Inc, The Renco Group Inc) are disclosure volume only, not toxicity-weighted risk or enforcement status.
Use and verify this record
Northrop Grumman Corp's record groups disclosed TRI parent-company filings so readers can compare reporting context without treating the total as a measure of risk.
Company release figures are computed directly from EPA Toxic Release Inventory data; source names and the record-linking method are documented in the methodology.
Primary sources
- EPA Toxics Release Inventory Basic Data Files - annual facility-level chemical-release disclosures
PlainEnviro renders public EPA records directly from its data pipeline; no figure on this page is typed in by an editor. See the editorial standards and corrections policy for how source changes and reported errors are handled.