Clean Truck Check Credentialed Tester

Clean Truck Check in St. John, KS

1 credentialed tester in St. John.

Testers in St. John

Nearest in-person tester to St. John

The closest CARB-credentialed Clean Truck Check tester is Great Plains Trucking in Salina, Kansas — about 87 miles away (straight-line). Smart CTC tests over the truck’s OBD port from anywhere, with no drive and no appointment.

Trucking activity in Stafford 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
7
Trucking employees
12

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

Freight corridors near St. John

St. John sits on US-281 and US-50. 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).