EPA TRI Facility · Transportation Equipment
Usaf Plant 42 Site 4 Northrop Grumman Systems Corp
Palmdale, CA
- Total releases
- 80.0K lbs
- Chemicals reported
- 2
- Carcinogens
- 1
- Primary pathway
- Air Releases
AIR Form-R mix
Usaf Plant 42 Site 4 Northrop Grumman Systems Corp: how the 80.0K lbs splits
80.0K lbs across all reported pathways
- Air Releases 80.0K lbs 100.0%
Usaf Plant 42 Site 4 Northrop Grumman Systems Corp's 80.0K lbs Form-R total is AIR - air releases is 100.0% of the bar. Off-site transfers stay separate from air, water, and land releases. Leading chemical by pounds: Methyl isobutyl ketone.
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.
LIGHT volume AIR pathway CARC-HEAVY
Usaf Plant 42 Site 4 Northrop Grumman Systems Corp is an EPA Toxics Release Inventory reporter in Palmdale, CA, in the transportation equipment sector. It reported 11.5K lbs of releases across 1 chemical in 2023, and 80.0K lbs in total across its 2019-2023 reporting years. That ranks 5,064 of 25,986 TRI facilities nationwide by cumulative reported pounds, counting each facility over however many years it has filed. In California's 1,149 reporting TRI sites, pounds #1 is not chemical-count #1. Usaf Plant 42 Site 4 Northrop Grumman Systems Corp is pounds #166 and chemical-count #547 at 80.0K lbs. Clean Harbors Buttonwillow LLC leads reported pounds (50.4M lbs) at 45 chemicals (chemical-count #2). Chevron Products Co Richmond Refinery leads chemical count at 46 chemicals (3.0M lbs, pounds #13). Reported volume fell against 2022. Pounds reported are not a measure of toxicity or health risk. Nearest other TRI reporters: Lockheed Martin Aeronautics Co; Palmdale Plant 39; Holliday Rock-Palmdale; US Dod Usaf Edwards Afb Ca. Similar-scale Transportation Equipment peers outside California: Blazer Boats Inc; Borgwarner Transmission Systems; Winnebago Industries Inc.; Rivian Automotive. Largest disclosed chemicals by pounds: Methyl isobutyl ketone; sec-Butyl alcohol.
Usaf Plant 42 Site 4 Northrop Grumman Systems Corp stamps LIGHT volume with a dominant AIR pathway (100.0% air releases) across 2 chemicals · 1 carcinogen-classified. Cumulative Form-R extract: 80.0K lbs (2019–2023). All figures are self-reported EPCRA §313 estimates, not measured stack emissions or a health-risk score. Scale peers include Blazer Boats Inc and Borgwarner Transmission Systems.
Usaf Plant 42 Site 4 Northrop Grumman Systems Corp vs. every reporting TRI facility
Cumulative reported release pounds, with this facility marked in the national distribution
80K lbs Top 19% higher than 81% 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
Usaf Plant 42 Site 4 Northrop Grumman Systems Corp: carcinogen-lbs share on Form-R
Among the 1,603 Transportation Equipment facilities in this database, Usaf Plant 42 Site 4 Northrop Grumman Systems Corp reports the 325th-largest volume, placing it in the top 20.3% of its sector. Carcinogen-classified chemicals make up 58.1% of the reported pounds, not just of the chemical count. Scale peers outside California include Blazer Boats Inc and Borgwarner Transmission Systems.
Carcinogen-heavy means ≥50% of pounds (58.1% here), not of chemical count. EPA/IARC classification ≠ site risk.
Annual disclosure change
What changed: EPA TRI 2023 reporting year
- Usaf Plant 42 Site 4 Northrop Grumman Systems Corp's total reported releases fell from 25.3 thousand lb in 2022 to 11.5 thousand lb in 2023, based on EPA TRI filings.
- Usaf Plant 42 Site 4 Northrop Grumman Systems Corp's air releases fell from 25.3 thousand lb in 2022 to 11.5 thousand lb in 2023, based on EPA TRI filings.
- Usaf Plant 42 Site 4 Northrop Grumman Systems Corp's chemicals reported fell from 2 in 2022 to 1 in 2023, based on EPA TRI filings.
Usaf Plant 42 Site 4 Northrop Grumman Systems Corp Form-R facts
Compare this facility
See how Usaf Plant 42 Site 4 Northrop Grumman Systems Corp stacks up against nearby facilities and the typical reporter.
3.2× more than the comparison
75% less 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 Usaf Plant 42 Site 4 Northrop Grumman Systems Corp releases toxic chemicals into the environment. Total: 80.0K lbs.
Emissions Trend Summary
From 2019 to 2023, total releases decreased by 46% (21.2K lbs to 11.5K lbs).
Usaf Plant 42 Site 4 Northrop Grumman Systems Corp: annual Form-R pounds
LIGHT site · AIR pathway · TRI years 2019–2023
- 2019 0
- 2020 0
- 2021 0
- 2022 0
- 2023 0
What this shows Usaf Plant 42 Site 4 Northrop Grumman Systems Corp year-over-year reported totals (decreased by 46% 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: Methyl isobutyl ketone.
| Year | Total | Chemicals |
|---|---|---|
| 2019 | 21.2K lbs | 1 |
| 2020 | 10.5K lbs | 1 |
| 2021 | 11.4K lbs | 1 |
| 2022 | 25.3K lbs | 2 |
| 2023 | 11.5K lbs | 1 |
Chemical Releases
Aggregated across all reporting years (2019–2023). 1 of 2 chemicals are carcinogens. Sorted by total release volume.
| Chemical | Total | Flags |
|---|---|---|
| Methyl isobutyl ketone | 46.4K lbs | Carcinogen |
| sec-Butyl alcohol | 33.5K lbs | - |
Usaf Plant 42 Site 4 Northrop Grumman Systems Corp · AIR-pathway site
Nearest TRI Facilities to Usaf Plant 42 Site 4 Northrop Grumman Systems Corp
Closest other reporters in California - including Lockheed Martin Aeronautics Co, Palmdale Plant 39, Holliday Rock-Palmdale, ordered by distance.
Showing 8 of 1,148 other reporting facilities in California.
Similar Transportation Equipment Facilities
Other Transportation Equipment facilities with similar total release volumes (±80%), outside California - e.g. Blazer Boats Inc, Borgwarner Transmission Systems, Winnebago Industries Inc..
Compare beyond California
Nationwide peers by reported pounds & chemical count
Cross-state TRI reporters nearest Usaf Plant 42 Site 4 Northrop Grumman Systems Corp on cumulative reported pounds (80.0K lbs) and distinct chemical count (2). Release-pound peers include U.S. Marine Corps Cherry Point Air Station, Southwestern Wire Inc, Webb Chemical Service Corp. Chemical-count peers include Idi Caribe Inc, Suiza Dairy Corp, Edwards Lifesciences Technology Sarl. 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.
- U.S. Marine Corps Cherry Point Air Station Cherry Point, NC · Other 80.0K lbs reported
- Southwestern Wire Inc Norman, OK · Fabricated Metals 79.9K lbs reported
- Webb Chemical Service Corp Muskegon Heights, MI · Chemical Wholesalers 80.0K lbs reported
- Yuma Ethanol LLC Yuma, CO · Chemicals 79.9K lbs reported
Similar chemical count
Nearest out-of-state reporters by distinct Form-R chemicals (deduped against the release-pound neighborhood).
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 Methyl isobutyl ketone, sec-Butyl alcohol; nearby reporters include Lockheed Martin Aeronautics Co. Usaf Plant 42 Site 4 Northrop Grumman Systems Corp stamps LIGHT volume · AIR pathway · CARC-HEAVY 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 Usaf Plant 42 Site 4 Northrop Grumman Systems Corp TRI extract (LIGHT · AIR · CARC-HEAVY · lead Methyl isobutyl ketone) joins EPA Form-R filings with facility identity - reported pounds, not a health-risk rating.
Usaf Plant 42 Site 4 Northrop Grumman Systems Corp totals are self-reported EPCRA §313 estimates for Palmdale, CA, latest year 2023. Form-R rows span 2019–2023 (5 years). NAICS 336411 · Transportation Equipment. 0.2% of Los Angeles TRI pounds in this extract. Nearest ABS peer: U.S. Marine Corps Cherry Point Air Station (Δ 15 lbs). Pounds ≠ exposure.
Usaf Plant 42 Site 4 Northrop Grumman Systems Corp stamps LIGHT volume · AIR pathway · CARC-HEAVY · lead Methyl isobutyl ketone. 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