Clean Truck Check Credentialed Tester

Clean Truck Check in Glenwood, IA

1 credentialed tester in Glenwood.

Testers in Glenwood

Nearest in-person tester to Glenwood

The closest CARB-credentialed Clean Truck Check tester is Jeffrey O'Brien in Gretna, Nebraska — about 27 miles away (straight-line). Smart CTC tests over the truck’s OBD port from anywhere, with no drive and no appointment.

Trucking activity in Mills 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
17
Trucking employees
50

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

Freight corridors near Glenwood

Glenwood sits on I-29, I-80, I-80-Express, I-80-Local, US-275 and US-34. 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 Glenwood. Useful for routing a service stop around your CTC test.

+9 more within 25 miles.

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