Clean Truck Check Credentialed Tester

Clean Truck Check Testers in Wisconsin

2 CARB-credentialed testers across 1 city.

Testers in Wisconsin

Trucking activity in Wisconsin

FMCSA MCMIS reports 26,400 active motor carriers registered with operations in Wisconsin. The Clean Truck Check program reaches the heavy-duty subset that operates in California, which is why this directory exists.

Interstate carriers
19,800
Intrastate carriers
6,600
Hazmat carriers
1,800
Passenger carriers
480
Heavy-duty power units
115,400
Medium-duty power units
14,700

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