Clean Truck Check Credentialed Tester

Clean Truck Check in Oklahoma City, OK

4 credentialed testers in Oklahoma City.

Testers in Oklahoma City

Air quality context in and around Oklahoma City

Annual aggregate readings from EPA Air Quality System monitors within about 25 miles of Oklahoma City, 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
8.27 Micrograms/cubic meter (LC)
4 monitors · 33,691 observations · 51 days above standard
Nitrogen dioxide (NO₂)
12.86 Parts per billion
2 monitors · 31,064 observations · 0 days above standard
Ozone (O₃)
0.05 Parts per million
4 monitors · 99,802 observations · 14 days above standard

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