Skip to main content
U.S. flag

An official website of the United States government

Official websites use .gov
A .gov website belongs to an official government organization in the United States.

Secure .gov websites use HTTPS
A lock ( ) or https:// means you’ve safely connected to the .gov website. Share sensitive information only on official, secure websites.

Skip to content
  • Feedback

    • Hazmat Approvals

    Metadata Updated: July 31, 2025

    The Pipeline and Hazardous Materials Safety Administration has the primary responsibility for the issuance of DOT Special Permits and Approvals to the Hazardous Materials Regulations (HMR). A Special Permit or Approval is a document which authorizes a person to perform a function that is not currently authorized under the authority of the HMR. Also, in many instances, the Regulations require approvals and/or registrations prior to transportation in commerce. Approvals Data Search tool allows a user to search for Approvals.

    Access & Use Information

    Public: This dataset is intended for public access and use. License: us-pd

    Downloads & Resources

    References

    https://www.phmsa.dot.gov/approvals-and-permits/hazmat/approvals-search

    Dates

    Metadata Created Date November 12, 2020
    Metadata Updated Date July 31, 2025
    Data Update Frequency R/P1D

    Metadata Source

    Harvested from DOT Socrata Data.json

    Other Data Resources

    Additional Metadata

    Resource Type Dataset
    Metadata Created Date November 12, 2020
    Metadata Updated Date July 31, 2025
    Publisher Pipeline and Hazardous Materials Safety Administration
    Maintainer
    Identifier DOT-30
    Data First Published 2012-01-18
    Language en-US
    Data Last Modified 2025-07-30
    Category Transportation
    Public Access Level public
    Data Update Frequency R/P1D
    Agencydataseriesurl https://www.phmsa.dot.gov/approvals-and-permits/hazmat/approvals-search
    Agencyprogramurl http://www.phmsa.dot.gov/hazmat/regs/sp-a/approvals
    Analysisunit Approval
    Bureau Code 021:50
    Metadata Context https://project-open-data.cio.gov/v1.1/schema/catalog.jsonld
    Metadata Catalog ID https://data.transportation.gov/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
    Categorydesignation Research
    Collectioninstrument Transportation
    Data Quality True
    Harvest Object Id f27a91aa-82d6-47bd-8ac2-dad7a4ded7ce
    Harvest Source Id a776e4b7-8221-443c-85ed-c5ee5db0c360
    Harvest Source Title DOT Socrata Data.json
    Homepage URL https://data.transportation.gov/d/gsii-b55p
    License http://www.usa.gov/publicdomain/label/1.0/
    Old Spatial Address
    Phone 202-493-0550
    Program Code 021:000
    Related Documents https://www.phmsa.dot.gov/approvals-and-permits/hazmat/approvals-search
    Source Datajson Identifier True
    Source Hash a4613a9e4919e31f50a3650b6194a42e53cdac34fb33b6b0c24dba5c6aaac8f2
    Source Schema Version 1.1
    Spatial
    Temporal R/1980-01-01/P1D

    Didn't find what you're looking for? Suggest a dataset here.