This site displays a prototype of a “Web 2.0” version of the daily Federal Register. It is not an official legal edition of the Federal Register, and does not replace the official print version or the official electronic version on GPO’s govinfo.gov.
The documents posted on this site are XML renditions of published Federal Register documents. Each document posted on the site includes a link to the corresponding official PDF file on govinfo.gov. This prototype edition of the daily Federal Register on FederalRegister.gov will remain an unofficial informational resource until the Administrative Committee of the Federal Register (ACFR) issues a regulation granting it official legal status. For complete information about, and access to, our official publications and services, go to About the Federal Register on NARA's archives.gov.
The OFR/GPO partnership is committed to presenting accurate and reliable regulatory information on FederalRegister.gov with the objective of establishing the XML-based Federal Register as an ACFR-sanctioned publication in the future. While every effort has been made to ensure that the material on FederalRegister.gov is accurately displayed, consistent with the official SGML-based PDF version on govinfo.gov, those relying on it for legal research should verify their results against an official edition of the Federal Register. Until the ACFR grants it official status, the XML rendition of the daily Federal Register on FederalRegister.gov does not provide legal notice to the public or judicial notice to the courts.
Rule
Enter a search term or FR citation e.g.88 FR 38230 FR 78782024-13208USDA09/05/24RULE0503-AA39SORN
Choosing an item fromfull text search results will bring you to those results. Pressing enter in the search box will also bring you to search results. Choosing an item fromsuggestions will bring you directly to the content.
Background and more details are available in theSearch & Navigation guide.
National Ambient Air Quality Standards for Particulate Matter
A Rule bytheEnvironmental Protection Agency on07/18/1997
This document has been published in theFederal Register. Use the PDF linked in the document sidebar for the official electronic format.
- Document DetailsPublished Content - Document DetailsPublished Content - Document Details
- Document DetailsPublished Content - Document DetailsPublished Content - Document Details
- Document DatesPublished Content - Document DatesPublished Content - Document Dates
- Public CommentsEnhanced Content - Public Comments
This feature is not available for this document.
Enhanced Content - Public Comments - Regulations.gov DataEnhanced Content - Regulations.gov Data
Additional information is not currently available for this document.
Enhanced Content - Regulations.gov Data - SharingEnhanced Content - Sharing
- Shorter Document URL
- https://www.federalregister.gov/d/97-18577
- Email this document to a friend
Enhanced Content - Sharing - Document StatisticsEnhanced Content - Document Statistics
Document page views are updated periodically throughout the day and are cumulative counts for this document. Counts are subject to sampling, reprocessing and revision (up or down) throughout the day.
- Page views
- 742 as of 10/26/2025 at 8:15 am EDT
Enhanced Content - Document Statistics - Other FormatsEnhanced Content - Other Formats
This document is also available in the following formats:
More information and documentation can be found in ourdeveloper tools pages.
Enhanced Content - Other Formats
This document has been published in theFederal Register. Use the PDF linked in the document sidebar for the official electronic format.
The full text of this document is currently available inPDF format.
The full text of this document is also available ina basic text format.