Recommended · Featured Partner
5— on Google ReviewsSmart CTC
Test your truck ANYWHERE in the USA, Canada or Mexico without scheduling shop visits or mobile testers.
RemoteOBDMotor Home
Clean Truck Check in Los Angeles, CA
66 credentialed testers in Los Angeles.
Testers in Los Angeles
Recommended · Featured Partner
5— on Google ReviewsClean Truck Check Pro
Mobile CARB-credentialed Clean Truck Check testing serving Southern California.
MobileOBDMotor Home
Franco CTC
Adrian Franco
MobileOBDOVIOVI tests are required for 2012 and older enginesMotor Home
AM SMOG
Alberto Ovando
MobileOBD
Alex Clean Truck Check
Alexandrer Baldomar
MobileOBDOVIOVI tests are required for 2012 and older enginesMotor Home
Aniceto Cutz
MobileOBD
ARIN HOVSEPIAN
! MOBILE TESTING 50 MILE RADIUS OF LA ! OVER 10'000 HAPPY CUSTOMERS ! WE COME TO YOU FOR OBD & OVI TEST !
LOS ANGELES, California
MobileOBDOVIOVI tests are required for 2012 and older enginesMotor Home
Arsen Kobra Masihi
MobileOBDMotor Home
AD SMOG CHECK
arturo duarte
MobileOBDMotor Home
Besty Smith
MobileOBDOVIOVI tests are required for 2012 and older enginesMotor Home
Trucking activity in Los Angeles 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
5,780
Trucking employees
39,203
Source: FMCSA MCMIS carrier census, US Census County Business Patterns 2021.
Air quality context in and around Los Angeles
Annual aggregate readings from EPA Air Quality System monitors within about 25 miles of Los Angeles, reporting year 2025. Clean Truck Check exists to reduce real-world emissions from heavy-duty vehicles — the numbers below are the local baseline those rules are designed to improve.
PM2.5
11.16 Micrograms/cubic meter (LC)
9 monitors · 93,313 observations · 563 days above standard
Nitrogen dioxide (NO₂)
16.43 Parts per billion
15 monitors · 272,544 observations · 0 days above standard
Ozone (O₃)
0.05 Parts per million
13 monitors · 410,017 observations · 382 days above standard
Source: EPA Air Quality System (AQS) API. Reporting year 2025. Last fetched 2026-05-18.