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2 datasets found
  • Federal

    2006 PM-2.5 Nonattainment Areas

    U.S. Environmental Protection Agency —

    This data layer identifies areas in the U.S. where air pollution levels have not met the National Ambient Air Quality Standards (NAAQS) for 2006 PM-2.5 standards....
  • Federal

    Collection Congestion Mitigation and Air Quality (CMAQ)

    Department of Transportation —

    All 50 states and the District of Columbia submit annual reports of their CMAQ project obligations in March of every year. The FHWA uses these yearly submissions to...
2 datasets found

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