Facility	City	Industry	Status	Distance
Sierra Alloys Company	Irwindale	Rolled Steel Shape Manufacturing 331221	ACTIVE	1.9 KM
MPG US Irwindale	Irwindale	Steel Wire Drawing 331222	LIKELY ACTIVE	1.9 KM
Sierra Alloys Company	Azusa	Rolled Steel Shape Manufacturing 331221	UNVERIFIED	2.1 KM
Professional Refinishing Org	La Puente	Rolled Steel Shape Manufacturing 331221	UNVERIFIED	8.0 KM
Kloeckner Metals CORP.	City of Industry	Iron and Steel Pipe and Tube Manufacturing from Purchased Steel 331210	UNVERIFIED	9.3 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.

MPG US Irwindale

Irwindale, CA

LIKELY ACTIVE331222EMP 100-499

WHERE THIS RECORD COMES FROM — 3 FEDERAL SOURCES, 6 FIELDS

Every fact on this page traces to a public federal filing. The table below names which register holds this facility, whether that register proves the plant operates or only that it exists, and when each of them last saw it.

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

Source	Evidence	First seen	Last seen
EPA ECHO	OPERATING	SEP 2025	SEP 2025
EPA FRS	EXISTENCE	JUN 2017	AUG 2024
EPA TRI	OPERATING	DEC 2023	DEC 2023

FIELD BY FIELD — WHICH SOURCE SUPPLIED WHAT

FIELD	SOURCE	SIGNAL
ADDRESS LINE1	EPA FRS	JUL 2026
CITY	EPA FRS	JUL 2026
GEOM	EPA FRS	JUL 2026
NAME	EPA FRS	JUL 2026
RCRA GENERATOR STATUS	EPA ECHO	AUG 2026
STATE	EPA FRS	JUL 2026

Status is computed from independent sources; nothing here is self-reported unless marked Claimed.

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