Clean Truck Check Credentialed Tester

Clean Truck Check Testers in Illinois

57 CARB-credentialed testers across 36 cities.

Cities with credentialed testers

Testers in Illinois

Trucking activity in Illinois

FMCSA MCMIS reports 71,300 active motor carriers registered with operations in Illinois. The Clean Truck Check program reaches the heavy-duty subset that operates in California, which is why this directory exists.

Interstate carriers
55,400
Intrastate carriers
15,900
Hazmat carriers
4,400
Passenger carriers
1,380
Heavy-duty power units
251,600
Medium-duty power units
33,200

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