AQI Calculator
AQI Calculators
Concentration to AQI Calculator
DIRECTIONS: Select a pollutant, then enter the Concentration value. Click on “Calculate” to see the results.
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.
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.