Clean Truck Check in Oklahoma City, OK

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.