Clean Truck Check Credentialed Tester

Clean Truck Check in Chester, SC

1 credentialed tester in Chester.

Testers in Chester

Nearest in-person tester to Chester

The closest CARB-credentialed Clean Truck Check tester is United Diesel Inc in Mebane, North Carolina — about 146 miles away (straight-line). Smart CTC tests over the truck’s OBD port from anywhere, with no drive and no appointment.

Trucking activity in Chester County

Clean Truck Check applies to heavy-duty vehicles that operate in California — including out-of-state trucks based here that run loads west.

Trucking establishments
19
Trucking employees
163

Source: FMCSA MCMIS carrier census, US Census County Business Patterns 2021.

Freight corridors near Chester

Chester sits on I-77, US-321, US-321-Business, SC-121, SC-49 and SC-72. Trucks running these routes into California fall under CARB’s Clean Truck Check — Smart CTC lets them test remotely without leaving the road.

Source: OpenStreetMap (© OpenStreetMap contributors).

Nearby truck stops

OpenStreetMap-tagged truck stops, services areas, and HGV-marked fuel stations within 25 miles of Chester. Useful for routing a service stop around your CTC test.

+3 more within 25 miles.

Source: © OpenStreetMap contributors. Last updated 2026-05-26.