Facility	City	Industry	Status	Distance
Mag Instrument, INC	Ontario	Electric Lamp Bulb and Other Lighting Equipment Manufacturing 335139	UNVERIFIED	0.9 KM
Mag Instrument INC	Ontario	Hardware Manufacturing 332510	UNVERIFIED	1.1 KM
Mag Instrument INC	Ontario	Electric Lighting Equipment Manufacturing 335129	UNVERIFIED	1.3 KM
Alta Advanced Technologies, Inc.	Ontario	Electric Lighting Equipment Manufacturing 335110	LIKELY ACTIVE	1.9 KM
Doble Engineering Company (Ontario, CA)	Ontario	Instruments and Related Products Manufacturing for Measuring, Displaying, and Controlling Industrial Process Variables 334513	LIKELY ACTIVE	2.1 KM

Every listed plant in San Bernardino County

Also at this address

No other federal record shares this street address.

WHERE THIS RECORD COMES FROM — 2 FEDERAL SOURCES, 5 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 ICIS · EPA site type STATIONARY.

Source	Evidence	First seen	Last seen
EPA FRS	EXISTENCE	OCT 2020	OCT 2020
EPA ECHO	OPERATING	FEB 2020	FEB 2020

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
STATE	EPA FRS	JUL 2026

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

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