Facility	City	Industry	Status	Distance
Dsw	San Carlos	Power, Distribution, and Specialty Transformer Manufacturing 335311	LIKELY ACTIVE	7.2 KM
Stangenes Industries, INC.	Palo Alto	Capacitor, Resistor, Coil, Transformer, and Other Inductor Manufacturing 334416	ACTIVE	9.0 KM
Pearson Electronics INC	Palo Alto	Capacitor, Resistor, Coil, Transformer, and Other Inductor Manufacturing 334416	ACTIVE	10.0 KM
Silicon Valley Electric Motor Dba Palo Alto Electric Motor	Palo Alto	Motor and Generator Manufacturing 335312	UNVERIFIED	10.3 KM
Technical Communities, INC.	San Mateo	Instrument Manufacturing for Measuring and Testing Electricity and Electrical Signals 334515	LIKELY ACTIVE	11.5 KM

Every listed plant in San Mateo County

Also at this address

No other federal record shares this street address.

Where this record comes from

3 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.

SAM.gov entity registrationOPERATING
Record XEU1P6B256V6 · first seen APR 2026 · last seen APR 2026
OSHA injury and illness reportsOPERATING
Record 747572 · first seen DEC 2025 · last seen DEC 2025
EPA Facility Registry ServiceEXISTENCE
Record 110072007021 · first seen SEP 2025 · last seen SEP 2025

ALSO RECORDED ASMAINSPRING ENERGY INC; MAINSPRING ENERGY, INC.

IN SAN MATEO COUNTY9 other plants share this one’s industry (Electrical Equipment Manufacturing, NAICS 3353); 1 of them has 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: MAINSPRING ENERGY INC · JUL 2026; SAM.gov: MAINSPRING ENERGY, INC. · APR 2026
Street addressSOURCES DISAGREE: EPA: 3575 HAVEN AVE · JUL 2026; SAM.gov: 3601 HAVEN AVE · APR 2026
City: EPA: MENLO PARK · JUL 2026 · ON THIS PAGE; SAM.gov: MENLO PARK · APR 2026 · ON THIS PAGE
State: EPA: CA · JUL 2026 · ON THIS PAGE; SAM.gov: CA · APR 2026 · ON THIS PAGE
County (FIPS code): EPA: 06081 · SEP 2026
CoordinatesSOURCES DISAGREE: Census geocoder: 37.485999046347,-122.185248915873 · JUL 2026 · ON THIS PAGE; EPA: 37.486319,-122.186944 · JUL 2026
Employees (band): OSHA: 500+ · DEC 2025
CAGE code: SAM.gov: 9WRM0 · APR 2026
SAM registration expires: SAM.gov: 2027-04-16 · APR 2026

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