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  2. Air Quality Analysis

Concentration Map - for Exceptional Events Analysis

Make a map of daily concentrations over several days. The daily air quality can be displayed in terms of the Air Quality Index or in concentration ranges for certain PM species like organic carbon, nitrates, and sulfates (More information on the Chemical Speciation Network). This tool may be useful for tracking an air pollution episode like a wildfire event.

This plot provides ozone, PM2.5, and PM10 data from AirNow for recent days that are not available from AQS. AQS data, as it becomes available, replaces any AirNow data. The AirNow data are not fully verified and validated through the quality assurance procedures monitoring organizations use to officially submit and certify data on the EPA AQS (Air Quality System) and, therefore, cannot be used to formulate or support regulation, guidance or any other Agency decision or position.
PM2.5 FEM (88502) data are included.
Data are pulled directly from AQS when the Plot Data button is clicked. The AirNow data refresh runs nightly, so concentrations for the previous day are typically available.


 
 

Air Quality Analysis

  • NAAQS Review Analysis
    • Carbon Monoxide Analyses
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  • Exceptional Events Analysis
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    • Final 2016 Exceptional Events Rule
Contact Us About Air Quality Analysis
Contact Us to ask a question, provide feedback, or report a problem.
Last updated on April 1, 2025
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