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    • Nonattainment Area - Nitrogen Dioxide (NO2-1971)

    Metadata Updated: May 8, 2024

    The Nonattainment Area - Nitrogen Dioxide (NO2-1971) dataset was designated on November 15, 1990 by the Environmental Protection Agency (EPA) and is part of the U.S. Department of Transportation (USDOT)/Bureau of Transportation Statistics (BTS) National Transportation Atlas Database (NTAD). This dataset provides detailed information about the nonattainment area for the Nitrogen Dioxide (1971) National Ambient Air Quality Standards (NAAQS). On September 22, 1998 the only Nitrogen Dioxide (1971) nonattainment area was redesignated to maintenance. These data are weekly from an OAQPS internal database. However, that does not necessarily mean the data have changed. For more information about this non-attainment area, please see the website https://www.epa.gov/green-book/green-book-nitrogen-dioxide-1971-area-information.

    Access & Use Information

    License: No license information was provided. If this work was prepared by an officer or employee of the United States government as part of that person's official duties it is considered a U.S. Government Work.

    Downloads & Resources

    Dates

    Metadata Date May 2, 2024
    Metadata Created Date June 4, 2023
    Metadata Updated Date May 8, 2024
    Reference Date(s) July 1, 2004 (creation)
    Frequency Of Update weekly

    Metadata Source

    Harvested from National Transportation Atlas Database (NTAD) Metadata

    Other Data Resources

    Additional Metadata

    Resource Type Dataset
    Metadata Date May 2, 2024
    Metadata Created Date June 4, 2023
    Metadata Updated Date May 8, 2024
    Reference Date(s) July 1, 2004 (creation)
    Responsible Party Environmental Protection Agency (EPA) (Point of Contact)
    Contact Email
    Guid Nonattainment Area - Nitrogen Dioxide (NO2-1971)
    Access Constraints Access Constraints: unrestricted
    Bbox East Long -67
    Bbox North Lat 71.5
    Bbox South Lat 18.5
    Bbox West Long -171.5
    Coupled Resource
    Frequency Of Update weekly
    Harvest Object Id 9a9d8546-0d8d-428c-90b0-9ceb31428a68
    Harvest Source Id ee45e034-47c1-4a61-a3ec-de75031e6865
    Harvest Source Title National Transportation Atlas Database (NTAD) Metadata
    Licence This NTAD dataset is a work of the United States government as defined in 17 U.S.C. § 101 and as such are not protected by any U.S. copyrights. This work is available for unrestricted public use.
    Lineage
    Metadata Language eng; USA
    Metadata Type geospatial
    Old Spatial {"type": "Polygon", "coordinates": [[[-171.5, 18.5], [-67.0, 18.5], [-67.0, 71.5], [-171.5, 71.5], [-171.5, 18.5]]]}
    Progress completed
    Spatial Data Service Type
    Spatial Reference System
    Spatial Harvester True

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