Clean Truck Check Credentialed Tester

Clean Truck Check in Orange, CA

15 credentialed testers in Orange.

Testers in Orange

Nearby truck stops

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

+8 unnamed stops also in range.

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

Air quality context in and around Orange

Annual aggregate readings from EPA Air Quality System monitors within about 25 miles of Orange, 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
12.17 Micrograms/cubic meter (LC)
11 monitors · 113,759 observations · 981 days above standard
Nitrogen dioxide (NO₂)
19.91 Parts per billion
16 monitors · 307,422 observations · 0 days above standard
Ozone (O₃)
0.05 Parts per million
12 monitors · 378,579 observations · 589 days above standard

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