Air Quality Index Scale
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Announcements
EPA Updates AQI for Particle Pollution
EPA has updated the Air Quality Index (AQI) for particle pollution, at the same time the Agency updated the annual health-based standard for this harmful pollutant. AirNow will reflect the updates when they become effective -- 60 days after the rule is published in the Federal Register. Read about the AQI updates.
2024 National Air Quality Conference
EPA will host the National Air Quality Conference (NAQC) as a virtual only event on March 18-21, 2024.
Visit the NAQC webpage to learn more about this event.