Semco Instruments INC.

• Layoff notice effective JUL 1, 2019 · 50 employees · filed MAY 1, 2019 · Layoff Permanent — recorded; a layoff does not change the status

Notices filed with the state under the federal WARN Act, as the state publishes them, collected by the WARN Act notices feed (CC BY 4.0). A notice records what the employer told the state; it is not by itself proof that the plant closed.

What they make

Where it is

Other plants nearby

Facility	City	Industry	Status	Distance
Applied Companies	Santa Clarita	Air-Conditioning and Warm Air Heating Equipment and Commercial and Industrial Refrigeration Equipment Manufacturing 333415	● ACTIVE	0.1 KM
Antenx LLC	Santa Clarita	Radio and Television Broadcasting and Wireless Communications Equipment Manufacturing 334220	● ACTIVE	0.3 KM
ADAerospace Dynamics International INC	Valencia	Search, Detection, Navigation, Guidance, Aeronautical, and Nautical System and Instrument Manufacturing 334511	◐ LIKELY ACTIVE	0.4 KM
Aerospace Dynamics International INC.	Valencia	Search, Detection, Navigation, Guidance, Aeronautical, and Nautical System and Instrument Manufacturing 334511	◐ LIKELY ACTIVE	0.4 KM
Aerospace Dynamics International, INC	Santa Clarita	Search, Detection, Navigation, Guidance, Aeronautical, and Nautical System and Instrument Manufacturing 334511	● ACTIVE	0.4 KM

Every listed plant in Los Angeles County

Also at this address

No other federal record shares this street address.

Where this record comes from

2 sources hold this plant, and 6 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 CARB-TCH · EPA site type FACILITY.

• EPA Facility Registry ServiceEXISTENCE
  Records 110002806189, 110071778593 · first seen OCT 2015 · last seen JUL 2024
• State WARN plant-closing and layoff noticesEXISTENCE
  first seen JUL 2019 · last seen JUL 2019

IN LOS ANGELES COUNTY338 other plants share this one’s industry (Navigational, Measuring, Electromedical, and Control Instruments Manufacturing, NAICS 3345); 74 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: SEMCO INSTRUMENTS INC. · OCT 2026

Street address

EPA: 25700 RYE CANYON RD · OCT 2026

City

EPA: VALENCIA · OCT 2026

State

EPA: CA · OCT 2026

County (FIPS code)

EPA: 06037 · SEP 2026

Coordinates

Census geocoder: 34.432177198081,-118.586777241704 · JUL 2026 · ON THIS PAGE

EPA: 34.43179,-118.58731 · JUL 2026 · ON THIS PAGE