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Download Data

  • Download Data Files
    Pre-generated files of data for the entire nation. Files of our most commonly requested parameters at the annual, daily, and hourly summary levels.

  • Download Daily Data
    Query daily summary concentrations and Air Quality Index values by criteria pollutants, year, county/CBSA/monitor. Best tool for getting daily data by monitoring site for a single year and a small geographic region.

  • Download Raw Data
    Query raw data for a specific location and time for any pollutant.

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