Clean Truck Check Testers in Iowa

Trucking activity in Iowa

FMCSA MCMIS reports 23,400 active motor carriers registered with operations in Iowa. The Clean Truck Check program reaches the heavy-duty subset that operates in California, which is why this directory exists.

Interstate carriers

18,100

Intrastate carriers

5,300

Hazmat carriers

1,500

Passenger carriers

380

Heavy-duty power units

88,600

Medium-duty power units

12,400

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