Clean Truck Check in Longview, WA

Nearest in-person tester to Longview

The closest CARB-credentialed Clean Truck Check tester is Justin Mumm in Chehalis, Washington — about 36 miles away (straight-line). Smart CTC tests over the truck’s OBD port from anywhere, with no drive and no appointment.

Trucking activity in Cowlitz 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

70

Trucking employees

496

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

Freight corridors near Longview

Longview sits on I-5, I-5-Bus, US-30, WA-4, WA-411 and WA-432. 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).