EPA TRI Facility · Transportation Equipment
Northrop Grumman Systems Corp - Promontory
Promontory, UT · Parent: Northrop Grumman Corp
- Total releases
- 1.2M lbs
- Chemicals reported
- 6
- Carcinogens
- 2
- Primary pathway
- Air Releases
AIR Form-R mix
Northrop Grumman Systems Corp - Promontory: how the 1.2M lbs splits
1.2M lbs across all reported pathways
- Air Releases 1.1M lbs 85.8%
- Land Disposal 173.7K lbs 14.1%
- Off-site Transfers 958 lbs 0.1%
Northrop Grumman Systems Corp - Promontory's 1.2M lbs Form-R total is AIR - air releases is 85.8% of the bar. Next segment: land disposal at 14.1%. Leading chemical by pounds: Hydrochloric acid (acid aerosols including mists, vapors, gas, fog, and other airborne forms of any particle size).
Carcinogen-classified pounds vs other reported pounds
Same cumulative TRI total as above, split by EPA/IARC carcinogen classification on each chemical: pounds share, not chemical count. Classification is not a site health-risk score.
HEAVY volume AIR pathway TRACE-CARC
Northrop Grumman Systems Corp - Promontory is an EPA Toxics Release Inventory reporter in Promontory, UT, in the transportation equipment sector. It reported 87.6K lbs of releases across 6 chemicals in 2023, and 1.2M lbs in total across its 2019-2023 reporting years. That ranks 1,155 of 25,986 TRI facilities nationwide by cumulative reported pounds, counting each facility over however many years it has filed. In Utah's 220 reporting TRI sites, pounds #1 is not chemical-count #1. Northrop Grumman Systems Corp - Promontory is pounds #20 and chemical-count #44 at 1.2M lbs. Kennecott Utah Copper Mine Concentrators & Power Plant leads reported pounds (781.4M lbs) at 34 chemicals (chemical-count #4). Clean Harbors Aragonite LLC leads chemical count at 193 chemicals (13.3M lbs, pounds #6). Reported volume fell against 2022. Pounds reported are not a measure of toxicity or health risk. Nearest other TRI reporters: Autoliv Asp Inc Promontory; The Procter & Gamble Paper Products Co; Nucor Corp Vulcraft Div; Nucor Building Systems Llc-Utah. Similar-scale Transportation Equipment peers outside Utah: Gm Mlcg Fairfax Assembly; Nautique Boat Co Inc.; Cobalt Boats LLC; Nissan N.a. Inc.. Other Northrop Grumman Corp sites in this extract: Northrop Grumman Systems Corp (new River Energetics); Allegany Ballistics Lab (nirop); Northrop Grumman Systems Corp - Bacchus; Northrop Grumman Systems 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); Polycyclic aromatic compounds; Nitroglycerin.
Northrop Grumman Systems Corp - Promontory stamps HEAVY volume with a dominant AIR pathway (85.8% air releases) across 6 chemicals · 2 carcinogen-classified. Cumulative Form-R extract: 1.2M lbs (2019–2023). All figures are self-reported EPCRA §313 estimates, not measured stack emissions or a health-risk score. Scale peers include Gm Mlcg Fairfax Assembly and Nautique Boat Co Inc..
Northrop Grumman Systems Corp - Promontory vs. every reporting TRI facility
Cumulative reported release pounds, with this facility marked in the national distribution
1.2M lbs Top 4% higher than 96% of 25,986 reporting TRI facilities
Each bar is a $1M-wide band; taller bars hold more reporting TRI facilities. The dashed line and filled bar mark this facility. Hover, focus, or tap a bar for its full count, share, and position.
Source U.S. Environmental Protection Agency, Toxics Release Inventory · 2023 reporting year
Northrop Grumman Systems Corp - Promontory: Hydrochloric acid (acid aerosols including mists, vapors, gas, fog, and other airborne forms of any particle size)-led volume
Among the 1,603 Transportation Equipment facilities in this database, Northrop Grumman Systems Corp - Promontory reports the 30th-largest volume, placing it in the top 1.9% of its sector. Its reported volume is concentrated rather than spread: Hydrochloric acid (acid aerosols including mists, vapors, gas, fog, and other airborne forms of any particle size) alone is 85.7% of the total. Scale peers outside Utah include Gm Mlcg Fairfax Assembly and Nautique Boat Co Inc..
Concentrated means ≥60% of Northrop Grumman Systems Corp - Promontory's pounds in one chemical - here Hydrochloric acid (acid aerosols including mists, vapors, gas, fog, and other airborne forms of any particle size) at 85.7%. Not a toxicity score.
Annual disclosure change
What changed: EPA TRI 2023 reporting year
- Northrop Grumman Systems Corp - Promontory's total reported releases fell from 344.2 thousand lb in 2022 to 87.6 thousand lb in 2023, based on EPA TRI filings.
- Northrop Grumman Systems Corp - Promontory's air releases fell from 318.5 thousand lb in 2022 to 52.9 thousand lb in 2023, based on EPA TRI filings.
- Northrop Grumman Systems Corp - Promontory'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 Systems Corp - Promontory's off-site transfers rose from 332 lb in 2022 to 398 lb in 2023, based on EPA TRI filings.
Northrop Grumman Systems Corp - Promontory Form-R facts
Compare this facility
See how Northrop Grumman Systems Corp - Promontory stacks up against nearby facilities and the typical reporter.
5.1× more than the comparison
3.0× more than the comparison
Comparison reflects reported pounds and chemical counts, not toxicity or health risk. Averages cover facilities reporting any release.
How does this facility release toxic chemicals?
How Northrop Grumman Systems Corp - Promontory releases toxic chemicals into the environment. Total: 1.2M lbs.
Emissions Trend Summary
From 2019 to 2023, total releases decreased by 70% (288.7K lbs to 87.6K lbs).
Northrop Grumman Systems Corp - Promontory: annual Form-R pounds
HEAVY site · AIR pathway · TRI years 2019–2023
- 2019 0
- 2020 0
- 2021 0
- 2022 0
- 2023 0
What this shows Northrop Grumman Systems Corp - Promontory year-over-year reported totals (decreased by 70% from 2019 to 2023). TRI figures are self-reported estimates and can swing with production, waste handling, and reporting changes, not only with controls. Lead chemical in the extract: Hydrochloric acid (acid aerosols including mists, vapors, gas, fog, and other airborne forms of any particle size).
| Year | Total | Chemicals |
|---|---|---|
| 2019 | 288.7K lbs | 4 |
| 2020 | 437.1K lbs | 5 |
| 2021 | 74.1K lbs | 5 |
| 2022 | 344.2K lbs | 6 |
| 2023 | 87.6K lbs | 6 |
Chemical Releases
Aggregated across all reporting years (2019–2023). 2 of 6 chemicals are carcinogens. Sorted by total release volume.
| Chemical | Total | Flags |
|---|---|---|
| Hydrochloric acid (acid aerosols including mists, vapors, gas, fog, and other airborne forms of any particle size) | 1.1M lbs | - |
| Aluminum (fume or dust) | 174.7K lbs | - |
| Polycyclic aromatic compounds | 1.1K lbs | Carcinogen |
| Nitroglycerin | 15 lbs | - |
| Dioxin and dioxin-like compounds | 0 lbs | Carcinogen |
| Ozone | 0 lbs | - |
Northrop Grumman Systems Corp - Promontory · AIR-pathway site
Nearest TRI Facilities to Northrop Grumman Systems Corp - Promontory
Closest other reporters in Utah - including Autoliv Asp Inc Promontory, The Procter & Gamble Paper Products Co, Nucor Corp Vulcraft Div, ordered by distance.
Showing 8 of 219 other reporting facilities in Utah.
Similar Transportation Equipment Facilities
Other Transportation Equipment facilities with similar total release volumes (±80%), outside Utah - e.g. Gm Mlcg Fairfax Assembly, Nautique Boat Co Inc., Cobalt Boats LLC.
Compare beyond Utah
Nationwide peers by reported pounds & chemical count
Cross-state TRI reporters nearest Northrop Grumman Systems Corp - Promontory on cumulative reported pounds (1.2M lbs) and distinct chemical count (6). Release-pound peers include Tyson Fresh Meats Inc-Perry, US Ecology Michigan Inc., Basf Corp. Chemical-count peers include Eaton Intelligent Power Ltd, Leoni Wire Inc, Turf Care Supply-Hatfield Plant. Neighborhoods are forced disjoint so each axis surfaces a different set of sites.
Similar reported release pounds
Nearest out-of-state reporters (≥1,000 lbs) by absolute TRI pounds, not same-industry or same-county neighbors.
Similar chemical count
Nearest out-of-state reporters by distinct Form-R chemicals (deduped against the release-pound neighborhood).
Other Northrop Grumman Corp Facilities
Same-parent TRI sites ranked by reported releases - including Northrop Grumman Systems Corp (new River Energetics), Allegany Ballistics Lab (nirop), Northrop Grumman Systems Corp - Bacchus.
About TRI Data
Data as of 2023 reporting year. Source: U.S. Environmental Protection Agency (EPA) Toxic Release Inventory.
On this page the largest disclosed chemicals include Hydrochloric acid (acid aerosols including mists, vapors, gas, fog, and other airborne forms of any particle size), Aluminum (fume or dust), Polycyclic aromatic compounds, Nitroglycerin; nearby reporters include Autoliv Asp Inc Promontory. Northrop Grumman Systems Corp - Promontory stamps HEAVY volume · AIR pathway · TRACE-CARC carcinogen-lbs on this Form-R extract. Totals are self-reported estimates under EPCRA §313, not measured stack emissions or a health-risk score.
Use and verify this record
This Northrop Grumman Systems Corp - Promontory TRI extract (HEAVY · AIR · TRACE-CARC · lead Hydrochloric acid (acid aerosols including mists, vapors, gas, fog, and other airborne forms of any particle size)) joins EPA Form-R filings with facility identity - reported pounds, not a health-risk rating.
Northrop Grumman Systems Corp - Promontory totals are self-reported EPCRA §313 estimates for Promontory, UT, latest year 2023. Form-R rows span 2019–2023 (5 years). NAICS 336415 · Transportation Equipment. 20.2% of Box Elder TRI pounds in this extract. Nearest ABS peer: Tyson Fresh Meats Inc-Perry (Δ 49 lbs). Pounds ≠ exposure.
Northrop Grumman Systems Corp - Promontory stamps HEAVY volume · AIR pathway · TRACE-CARC · lead Hydrochloric acid (acid aerosols including mists, vapors, gas, fog, and other airborne forms of any particle size). PlainEnviro renders this EPA Form-R extract from its pipeline; no figure is typed in by an editor. Corrections: editorial policy.
All federal data sources used on this page
- EPA Toxics Release Inventory (TRI) Basic Data Files - annual self-reported chemical-release filings. epa.gov
- EPA TRI Program reference - how chemicals and reported releases are counted. epa.gov
- EPA Facility Registry Service - facility location and identity. epa.gov
- EPA ECHO - regulatory and compliance context. epa.gov
- EPA Envirofacts - the EPA data warehouse exposing these datasets. epa.gov