Clean Truck Check Testers in South Carolina

Trucking activity in South Carolina

FMCSA MCMIS reports 20,800 active motor carriers registered with operations in South Carolina. The Clean Truck Check program reaches the heavy-duty subset that operates in California, which is why this directory exists.

Interstate carriers

15,400

Intrastate carriers

5,400

Hazmat carriers

1,280

Passenger carriers

540

Heavy-duty power units

58,400

Medium-duty power units

12,400

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