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

All cities & towns 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.