Clean Truck Check in Oxnard, CA

Air quality context in and around Oxnard

Annual aggregate readings from EPA Air Quality System monitors within about 25 miles of Oxnard, 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

5.82 Micrograms/cubic meter (LC)

5 monitors · 56,927 observations · 28 days above standard

Nitrogen dioxide (NO₂)

3.55 Parts per billion

2 monitors · 29,674 observations · 0 days above standard

Ozone (O₃)

0.04 Parts per million

5 monitors · 156,532 observations · 1 day above standard

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