Memc Electronic Materials INC

501 Pearl Drive, O Fallon, MO 63366

LIKELY ACTIVELAST SEEN IN FEDERAL DATA JUL 2026 · 3 SOURCES

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

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What they make

Semiconductor and Related Device Manufacturing334413

Where it is

38.81513, -90.66158 · CENSUS TIGER

COUNTY

St. Charles County

METRO AREA

St. Louis, MO-IL

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Other plants nearby

Facility	City	Industry	Status	Distance
Memc Soi	Saint Peters	Semiconductor and Related Device Manufacturing 334413	LIKELY ACTIVE	0.5 KM
Memc Soi	St. Peters	Semiconductor and Related Device Manufacturing 334413	LIKELY ACTIVE	0.5 KM
Memc Llc-st. Peters Plant	St Peters	Semiconductor and Related Device Manufacturing 334413	UNVERIFIED	0.5 KM
Rpmc Lasers INC.	O Fallon	Semiconductor and Related Device Manufacturing 334413	ACTIVE	3.3 KM
Fin-con Assembly Group, INC.	O Fallon	Other Communication and Energy Wire Manufacturing 335929	LIKELY ACTIVE	5.7 KM

Every listed plant in St. Charles County

Also at this address

No other federal record shares this street address.

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, ICIS, MO-DNR, NCDB, NPDES, RCRAINFO, SFDW, TRIS, TSCA · EPA site type STATIONARY.

EPA ECHO compliance recordsOPERATING
first seen MAY 2024 · last seen JUL 2026
EPA Toxics Release InventoryOPERATING
first seen DEC 2023 · last seen DEC 2024
EPA Facility Registry ServiceEXISTENCE
Record 110000442101 · first seen OCT 2016 · last seen OCT 2016

IN ST. CHARLES COUNTY10 other plants share this one’s industry (Semiconductor and Other Electronic Component Manufacturing, NAICS 3344); 3 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: MEMC ELECTRONIC MATERIALS INC · OCT 2026
Street address: EPA: 501 PEARL DRIVE · OCT 2026
City: EPA: O FALLON · OCT 2026
State: EPA: MO · OCT 2026
County (FIPS code): EPA: 29183 · OCT 2026
Coordinates: EPA: 38.815135,-90.661579 · OCT 2026
Hazardous waste generator (RCRA): EPA ECHO: SQG · OCT 2026

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