Clean Truck Check Credentialed Tester

Clean Truck Check in Sioux City, IA

1 credentialed tester in Sioux City.

Testers in Sioux City

Nearest in-person tester to Sioux City

The closest CARB-credentialed Clean Truck Check tester is Ernest Yurkoits in Sioux Falls, South Dakota — about 75 miles away (straight-line). Smart CTC tests over the truck’s OBD port from anywhere, with no drive and no appointment.

Trucking activity in Woodbury 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
62
Trucking employees
405

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

Freight corridors near Sioux City

Sioux City sits on I-129, I-29, US-20, US-20-Bus, US-20-Business and US-75. 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 Sioux City. Useful for routing a service stop around your CTC test.

+4 more within 25 miles.

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