Clean Truck Check Testers in Washington

Trucking activity in Washington

FMCSA MCMIS reports 24,800 active motor carriers registered with operations in Washington. The Clean Truck Check program reaches the heavy-duty subset that operates in California, which is why this directory exists.

Interstate carriers

17,200

Intrastate carriers

7,600

Hazmat carriers

1,300

Passenger carriers

620

Heavy-duty power units

73,200

Medium-duty power units

14,800

Source: FMCSA MCMIS Registration Statistics. Snapshot 2024-10-01. Last fetched 2026-05-18.