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Frequent Questions

How do you go from concentrations to AQI values?

The converter tools are located on the AIRNow.gov web site:

Convert AQI to Concentration:  http://www.airnow.gov/index.cfm?action=resources.aqi_conc_calc

Convert Concentration to AQI:  http://www.airnow.gov/index.cfm?action=resources.conc_aqi_calc

Also, you can find more details about the AQI equation itself in the following document

(see page 13): http://www.epa.gov/ttn/oarpg/t1/memoranda/rg701.pdf

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