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    • EnviroAtlas - Particulate Matter Concentration (PM2.5) - Days over 35 micrograms per cubic meter in 2017 for the Conterminous United States

    Metadata Updated: February 24, 2025

    This raster GIS dataset includes the number of days in 2017 that the concentration of particulate matter with a diameter of 2.5 micrometers or smaller (PM2.5) predicted by the Community Multiscale Air Quality modeling system (CMAQ) exceeds a threshold value of 35 micrograms per cubic meter. This dataset was produced by the US EPA to support research and online mapping activities related to EnviroAtlas. EnviroAtlas (https://www.epa.gov/enviroatlas) allows the user to interact with a web-based, easy-to-use, mapping application to view and analyze multiple ecosystem services for the contiguous United States. The dataset is available as downloadable data (https://edg.epa.gov/data/Public/ORD/EnviroAtlas) or as an EnviroAtlas map service. Additional descriptive information about each attribute in this dataset can be found in its associated EnviroAtlas Fact Sheet (https://www.epa.gov/enviroatlas/enviroatlas-fact-sheets).

    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 January 8, 2025
    Metadata Created Date February 24, 2025
    Metadata Updated Date February 24, 2025
    Reference Date(s) December 16, 2021 (publication), December 16, 2021 (revision)
    Frequency Of Update asNeeded

    Metadata Source

    Harvested from Environmental Dataset Gateway ISO Geospatial Metadata

    Other Data Resources

    Additional Metadata

    Resource Type Dataset
    Metadata Date January 8, 2025
    Metadata Created Date February 24, 2025
    Metadata Updated Date February 24, 2025
    Reference Date(s) December 16, 2021 (publication), December 16, 2021 (revision)
    Responsible Party U.S. Environmental Protection Agency, Office of Research and Development - Center for Public Health and Environmental Assessment (CPHEA), EnviroAtlas (Publisher)
    Contact Email
    Guid DF8359EB-C8E6-4FC1-BD1E-767745C886DE
    Access Constraints https://edg.epa.gov/EPA_Data_License.html
    Bbox East Long -64.237763
    Bbox North Lat 51.93219
    Bbox South Lat 22.607417
    Bbox West Long -128.4049
    Coupled Resource
    Frequency Of Update asNeeded
    Harvest Object Id 6f698125-894e-40da-a380-4f0baae8d528
    Harvest Source Id 9b3cd81e-5515-4bb7-ad3c-5ae44de9b4bd
    Harvest Source Title Environmental Dataset Gateway ISO Geospatial Metadata
    Licence None. Please check sources, scale, accuracy, currency and other available information. Please confirm that you are using the most recent copy of both data and metadata. Acknowledgement of the EPA would be appreciated.
    Lineage
    Metadata Language eng
    Metadata Type geospatial
    Old Spatial {"type": "Polygon", "coordinates": [[[-128.4049, 22.607417], [-64.237763, 22.607417], [-64.237763, 51.93219], [-128.4049, 51.93219], [-128.4049, 22.607417]]]}
    Progress completed
    Spatial Data Service Type
    Spatial Reference System 0
    Spatial Harvester True
    Temporal Extent Begin 2017-01-01T00:00:00
    Temporal Extent End 2017-12-31T00:00:00

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