Day Zero Diagnostics

250 Arsenal Pl, Ste 320, Watertown, MA 02472

LIKELY ACTIVELAST SEEN IN FEDERAL DATA DEC 2024 · 2 SOURCES

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

Directions Claim this page Get the badge

What they make

Analytical Laboratory Instrument Manufacturing334516

Where it is

42.36531, -71.17272 · CENSUS TIGER

COUNTY

Middlesex County

METRO AREA

Boston-Cambridge-Newton, MA-NH

ON GOOGLE MAPS

Open this address

Other plants nearby

Facility	City	Industry	Status	Distance
Doble Engineering Company	Watertown	Instrument Manufacturing for Measuring and Testing Electricity and Electrical Signals 334515	UNVERIFIED	0.0 KM
United Electric Controls Company	Watertown	Instruments and Related Products Manufacturing for Measuring, Displaying, and Controlling Industrial Process Variables 334513	LIKELY ACTIVE	0.7 KM
Ge Ionics	Watertown	Plastics Material and Resin Manufacturing 325211	UNVERIFIED	1.7 KM
Avanti Battery Company	Watertown	Analytical Laboratory Instrument Manufacturing 334516	LIKELY ACTIVE	1.9 KM
Fresh Pond Ventures LLC	Belmont	Electromedical and Electrotherapeutic Apparatus Manufacturing 334510	ACTIVE	3.0 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 9 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 RCRAINFO · EPA site type STATIONARY.

DOL Form 5500 retirement plan filingsOPERATING
Record 812254210|MA|02472|250 arsenal pl · first seen DEC 2024 · last seen DEC 2024
EPA Facility Registry ServiceEXISTENCE
Record 110071673971 · first seen APR 2024 · last seen APR 2024

IN MIDDLESEX COUNTY277 other plants share this one’s industry (Navigational, Measuring, Electromedical, and Control Instruments Manufacturing, NAICS 3345); 91 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: DAY ZERO DIAGNOSTICS · OCT 2026
Street address: EPA: 250 ARSENAL PL · OCT 2026
City: EPA: WATERTOWN · OCT 2026
State: EPA: MA · OCT 2026
County (FIPS code): EPA: 25017 · OCT 2026
Coordinates: EPA: 42.365313,-71.17272 · OCT 2026
Employees (band): DOL: 20-99 · DEC 2024
Retirement plan filing (Form 5500): DOL: 48 active participants, plan year ending 2024-12-31, 1 plan(s) · DEC 2024
Hazardous waste generator (RCRA): EPA ECHO: none · OCT 2026

Report a correction · Request removal