Carrier profile · USDOT 157345 · Updated Jun 21, 2026

National Grid Service Co Inc

DBA NATIONAL GRID

235 power unitsavg 7.3 yrRegional · 4 statesWALTHAM, MA87/100
AUTHORITY STATUS UNKNOWNRATED SATISFACTORYHAZMAT
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Operations & Lanes

Where this carrier actually runs, revealed by roadside-inspection geography over the last 24 months — not where they claim to operate, shown as state-level inspection density.

Operating footprint· revealed by roadside-inspection geography

Operating radiusRegional
revealed
States observed3
US states
Inspections · 24 mo12
MA busiest

Inspection density by state· each tile = a state · shade = inspections, last 24 mo

Home base
WALTHAM, MA
40 SYLVAN ROAD
Top corridor
MA
MA 9 · NH 2 · NY 1
Density
fewermore
Shade = roadside inspections, last 24 mo.

State activity ranking· all 3 states · trailing 24 mo

Roadside inspections by state · NATIONAL GRID SERVICE CO INC · trailing 24 months
StateCoverageInspections
MAMassachusettsHQ9
NHNew Hampshire2
NYNew York1