Raytheon Former Waltham Facil

What they make

Where it is

Other plants nearby

Facility	City	Industry	Status	Distance
Combined Ingenuity INC	Newtonville	Electromedical and Electrotherapeutic Apparatus Manufacturing 334510	▲ REPORTED CLOSED	0.9 KM
Cyntony CORP	Lexington	Radio and Television Broadcasting and Wireless Communications Equipment Manufacturing 334220	● ACTIVE	6.5 KM
D1Digital 128 First Avenue LLC	Needham	Telephone Apparatus Manufacturing 334210	◇ UNVERIFIED	7.7 KM
Axrad LLC	Arlington	Other Measuring and Controlling Device Manufacturing 334519	● ACTIVE	6.4 KM
OWOrion Wave Technology Corporation	Arlington	Radio and Television Broadcasting and Wireless Communications Equipment Manufacturing 334220	● ACTIVE	7.4 KM

Every listed plant in Middlesex County

Also at this address

No other federal record shares this street address.

Where this record comes from

2 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, MA-EPICS, RCRAINFO, TRIS · EPA site type STATIONARY.

• EPA ECHO compliance recordsOPERATING
  first seen NOV 2006 · last seen AUG 2026
• EPA Facility Registry ServiceEXISTENCE
  Record 110046365660 · first seen JUN 2020 · last seen JUN 2020

IN MIDDLESEX COUNTY32 other plants share this one’s industry (Communications Equipment Manufacturing, NAICS 3342); 10 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: RAYTHEON FORMER WALTHAM FACIL · OCT 2026

Street address

EPA: 20 SEYON ST · OCT 2026

City

EPA: WALTHAM · OCT 2026

State

EPA: MA · OCT 2026

County (FIPS code)

EPA: 25017 · OCT 2026

Coordinates

EPA: 42.371019,-71.214403 · OCT 2026

Hazardous waste generator (RCRA)

EPA ECHO: LQG · OCT 2026