Clean Truck Check Credentialed Tester

Clean Truck Check in Woodland, CA

17 credentialed testers in Woodland.

Testers in Woodland

Nearby truck stops

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

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

Air quality context in and around Woodland

Annual aggregate readings from EPA Air Quality System monitors within about 25 miles of Woodland, 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
7.33 Micrograms/cubic meter (LC)
4 monitors · 45,815 observations · 88 days above standard
Nitrogen dioxide (NO₂)
7.27 Parts per billion
5 monitors · 68,690 observations · 0 days above standard
Ozone (O₃)
0.04 Parts per million
7 monitors · 211,825 observations · 1 day above standard

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