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    • Mobile Source Observation Database (MSOD)

    Metadata Updated: February 10, 2026

    The Mobile Source Observation Database (MSOD) is a relational database being developed by the Assessment and Standards Division (ASD) of the US Environmental Protection Agency Office of Transportation and Air Quality (formerly the Office of Mobile Sources). The MSOD contains emission test data from in-use mobile air- pollution sources such as cars, trucks, and engines from trucks and nonroad vehicles. Data in the database was collected from 1982 to the present. The data is intended to be representative of in-use vehicle emissions in the United States.

    Access & Use Information

    Public: This dataset is intended for public access and use. License: See this page for license information.

    Downloads & Resources

    References

    https://edg.epa.gov/metadata/catalog/search/resource/details.page?uuid=%7B368EE0F0-011C-4755-982B-022DF2C2EF25%7D
    https://edg.epa.gov/metadata/rest/document?id=%7B368EE0F0-011C-4755-982B-022DF2C2EF25%7D

    Dates

    Metadata Created Date January 30, 2026
    Metadata Updated Date February 10, 2026
    Data Update Frequency irregular

    Metadata Source

    Harvested from EPA Non Geo Repository

    Other Data Resources

    Additional Metadata

    Resource Type Dataset
    Metadata Created Date January 30, 2026
    Metadata Updated Date February 10, 2026
    Publisher U.S. EPA Office of Air and Radiation (OAR) - Office of Transportation and Air Quality (OTAQ)
    Maintainer
    Identifier 368EE0F0-011C-4755-982B-022DF2C2EF25
    Data First Published 2014-01-01
    Data Last Modified 2014-01-01
    Public Access Level public
    Data Update Frequency irregular
    Bureau Code 020:00
    Metadata Context https://project-open-data.cio.gov/v1.1/schema/catalog.jsonld
    Metadata Catalog ID https://edg.epa.gov/data/nongeo_data.json
    Schema Version https://project-open-data.cio.gov/v1.1/schema
    Catalog Describedby https://project-open-data.cio.gov/v1.1/schema/catalog.json
    Harvest Object Id 50c9a7cf-59ea-43e3-8cbd-5fc04f6500ac
    Harvest Source Id 9c1c2b5b-7925-4ca2-a663-ca2131653db1
    Harvest Source Title EPA Non Geo Repository
    License https://edg.epa.gov/EPA_Data_License.html
    Old Spatial -180.0,18.0,-66.0,72.0
    Program Code 020:072
    Related Documents https://edg.epa.gov/metadata/catalog/search/resource/details.page?uuid=%7B368EE0F0-011C-4755-982B-022DF2C2EF25%7D, https://edg.epa.gov/metadata/rest/document?id=%7B368EE0F0-011C-4755-982B-022DF2C2EF25%7D
    Source Datajson Identifier True
    Source Hash 79297f8f3332fc25fcc27d05160754927be11f15e497edc2d5947097de48be18
    Source Schema Version 1.1
    Spatial {"type": "Polygon", "coordinates": -180.0, 18.0, -180.0, 72.0, -66.0, 72.0, -66.0, 18.0, -180.0, 18.0}

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