Usaf Plant 42 Site 4

3520 East Avenue M, Palmdale, CA 93550

LIKELY ACTIVELAST SEEN IN FEDERAL DATA FEB 2026 · 3 SOURCES

Operating signal within 24 months, or from a single source.

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What they make

Aircraft Manufacturing336411

Where it is

34.64589, -118.06856 · CENSUS TIGER

COUNTY

Los Angeles County

METRO AREA

Los Angeles-Long Beach-Anaheim, CA

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Other plants nearby

Facility	City	Industry	Status	Distance
Air Force Plant 42	Palmdale	Aircraft Manufacturing 336411	LIKELY ACTIVE	2.4 KM
Boeing Company - Rss Division	Palmdale	Aircraft Manufacturing 336411	LIKELY ACTIVE	3.2 KM
Northrop Grumman Air Force Plant 42 Site 8	Palmdale	Aircraft Manufacturing 336411	UNVERIFIED	4.7 KM
Lockheed Martin Aeronautics Palmdale Site 7	Palmdale	Aircraft Manufacturing 336411	UNVERIFIED	5.8 KM
Lockheed Martin Corporation	Palmdale	Aircraft Manufacturing 336411	ACTIVE	5.6 KM

Every listed plant in Los Angeles County

Also at this address

1 other record shares this street address. Separate filings can describe distinct businesses on one site, or the same plant recorded by different agencies, so every record is kept rather than merged away.

US Tool Group- Palmdale NG

Palmdale, CA

LIKELY ACTIVE333517EMP 20-99

Where this record comes from

3 sources hold this plant, and 7 fields on this page come from them. Each line is one agency’s own record of it: the identifier it is filed under, whether that record shows the plant operating or only that it exists, and when the register first and last saw it there.

EPA cross-references this facility in AIR, AIRS/AFS, BR, CA-ENVIROVIEW, EIS, EPS, HWTS-DATAMART, OSHA-OIS, RCRAINFO, SFDW, TRIS · EPA site type STATIONARY.

EPA ECHO compliance recordsOPERATING
first seen FEB 2026 · last seen FEB 2026
EPA Toxics Release InventoryOPERATING
first seen DEC 2023 · last seen DEC 2024
EPA Facility Registry ServiceEXISTENCE
Record 110000781459 · first seen JUN 2017 · last seen JUN 2017

IN LOS ANGELES COUNTY523 other plants share this one’s industry (Aerospace Product and Parts Manufacturing, NAICS 3364); 126 of them have a size band on record.

What each source says

Every field below, as each source filed it. The value this page shows is marked; where the sources disagree, the field says so. Status is computed from independent sources; nothing here is self-reported unless marked Claimed.

Name: EPA: USAF PLANT 42 SITE 4 · OCT 2026
Street address: EPA: 3520 EAST AVENUE M · OCT 2026
City: EPA: PALMDALE · OCT 2026
State: EPA: CA · OCT 2026
County (FIPS code): EPA: 06037 · OCT 2026
Coordinates: EPA: 34.645894,-118.068556 · OCT 2026
Hazardous waste generator (RCRA): EPA ECHO: LQG · OCT 2026

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