Clean Truck Check Credentialed Tester

Clean Truck Check in San Bernardino, CA

32 credentialed testers in San Bernardino.

Testers in San Bernardino

Trucking activity in San Bernardino 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
1,953
Trucking employees
21,519

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

Nearby truck stops

OpenStreetMap-tagged truck stops, services areas, and HGV-marked fuel stations within 25 miles of San Bernardino. Useful for routing a service stop around your CTC test.

+8 more within 25 miles.

Source: © OpenStreetMap contributors. Last updated 2026-05-18.

Air quality context in and around San Bernardino

Annual aggregate readings from EPA Air Quality System monitors within about 25 miles of San Bernardino, 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
10.81 Micrograms/cubic meter (LC)
7 monitors · 79,599 observations · 475 days above standard
Nitrogen dioxide (NO₂)
20.26 Parts per billion
9 monitors · 169,640 observations · 0 days above standard
Ozone (O₃)
0.06 Parts per million
10 monitors · 316,031 observations · 1160 days above standard

Source: EPA Air Quality System (AQS) API. Reporting year 2025. Last fetched 2026-05-18.