Air Quality Index From PM2.5 (EPA, 2024 Breakpoints)
Converts a 24-hour PM2.5 concentration to the Air Quality Index, or an AQI back to PM2.5, with EPA's 2024 breakpoints.
Open the calculator → Runs in your browser. Data leaves only if you deliberately send a problem report from the interactive tool.
Example
- PM2.5, 24-hour
- 10
Result: PM2.5 of 10.0 ug/m3 is AQI 53, Moderate under the 2024 breakpoints.
The tool opens with these values already filled in. Replace them with your own.
What you enter
- PM2.5, 24-hour (ug/m3)
- AQI value
- Patient is in a sensitive group
How this is calculated
U.S. EPA. Technical Assistance Document for the Reporting of Daily Air Quality -- the Air Quality Index (AQI). AirNow; May 2026. Table 6 and Equation 1 (PM2.5 breakpoints as revised in 2024). Read the source ↗
A reference and educational tool. Not medical, legal, or financial advice, and not a substitute for clinician judgment.