Sumco Southwest CORP

What they make

Where it is

Other plants nearby

Facility	City	Industry	Status	Distance
Ambature INC	Scottsdale	Semiconductor and Related Device Manufacturing 334413	◐ LIKELY ACTIVE	6.0 KM
AAbbott	Scottsdale	Other Electronic Component Manufacturing 334419	◇ UNVERIFIED	7.0 KM
Nkk Switches of America INC	Scottsdale	Other Electronic Component Manufacturing 334419	● ACTIVE	8.1 KM
E3 Displays, LLC	Phoenix	Other Electronic Component Manufacturing 334419	● ACTIVE	8.3 KM
SMSt Microelectronics	Phoenix	Bare Printed Circuit Board Manufacturing 334412	◇ UNVERIFIED	8.5 KM

Every listed plant in Maricopa County

Also at this address

No other federal record shares this street address.

Where this record comes from

6 sources hold this plant, and 12 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, AZURITE, BR, E-GGRT, EIS, EPS, ICIS, NCDB, RCRAINFO, TRIS · EPA site type STATIONARY.

• SAM.gov entity registrationOPERATING
  Record C3F4KR1LENP5 · first seen FEB 2026 · last seen OCT 2026
• EPA ECHO compliance recordsOPERATING
  first seen JUN 2026 · last seen JUN 2026
• OSHA injury and illness reportsOPERATING
  Record 1262948 · first seen DEC 2025 · last seen DEC 2025
• DOL Form 5500 retirement plan filingsOPERATING
  Record 223014284|AZ|85050|19801 n tatum blvd · first seen MAY 2025 · last seen MAY 2025
• EPA Toxics Release InventoryOPERATING
  first seen DEC 2023 · last seen DEC 2024
• EPA Facility Registry ServiceEXISTENCE
  Record 110000470455 · first seen AUG 2022 · last seen AUG 2022

ALSO RECORDED ASSUMCO PHOENIX CORP; SUMCO Southwest Corporation (SPP)

IN MARICOPA COUNTY164 other plants share this one’s industry (Semiconductor and Other Electronic Component Manufacturing, NAICS 3344); 53 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.

NameSOURCES DISAGREE

EPA: SUMCO SOUTHWEST CORP · OCT 2026 · ON THIS PAGE

SAM.gov: SUMCO PHOENIX CORP

Street address

EPA: 19801 N TATUM BLVD · OCT 2026 · ON THIS PAGE

SAM.gov: 19801 N TATUM BLVD · ON THIS PAGE

City

EPA: PHOENIX · OCT 2026 · ON THIS PAGE

SAM.gov: PHOENIX · ON THIS PAGE

State

EPA: AZ · OCT 2026 · ON THIS PAGE

SAM.gov: AZ · ON THIS PAGE

County (FIPS code)

EPA: 04013 · OCT 2026

CoordinatesSOURCES DISAGREE

Census geocoder: 33.671753901868,-111.977326943188 · JUL 2026

EPA: 33.66596,-111.9737 · OCT 2026 · ON THIS PAGE

Employees (band)

OSHA: 100-499 · DEC 2025

CAGE code

SAM.gov: 7RXH5

Retirement plan filing (Form 5500)

DOL: 618 active participants, plan year ending 2025-05-31, 2 plan(s) · MAY 2025

Hazardous waste generator (RCRA)

EPA ECHO: LQG · OCT 2026

SAM registration expires

SAM.gov: 2027-02-19

State business registration

TX Comptroller: SUMCO SOUTHWEST CORPORATION, registered with the Texas Comptroller of Public Accounts; Corporation; active