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site: EPA - AIRNOW.GOV

URL: https://airnow.gov

"AirNow is your one-stop source for air quality data. Our recently redesigned site highlights air quality in your local area first, while still providing air quality information at state, national, and world views. A new interactive map even lets you zoom out to get the big picture or drill down to see data for a single air quality monitor.

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AirNow reports air quality using the official U.S. Air Quality Index (AQI), a color-coded index designed to communicate whether air quality is healthy or unhealthy for you. When you know the AQI in your area, you can take steps to protect your health."

  • Airnow Main Site

    • Current

    • Forecast

    • Loops

    • Archive - Going back at least 1+ year

    • Monitors - Daily AQI

      • Ozone and PM 2.5 & 10

    • Contours - Daily AQI

      • Ozone and PM 2.5 & 10

    • Boundaries

      • EPA Tribal Areas

      • National Park Service

      • USA Counties

    • Multiple Basemaps​

  • Other Tools​

    • AirCompare

    • Daily AirQuality tracker

      • https://www.epa.gov/outdoor-air-quality-dataTechnical Reports

        • PM2.5 Continuous Monitor Comparability Assessments

        • PM10 Continuous Monitor Comparability Assessments

        • Single Point Precision and Bias Report

        • Data Viz

        • Tile Plot - Multiyear

        • Tile Plot - Single Year

        • Daily Air Quality Tracker (PDF)

        • AQI Plot

        • Concentration Plot

        • Ozone Exceedances Plot

        • Concentration Map

    • Download Data

      • Pre-generated Data Files

      • Download Daily Data

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