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Regulatory documents from Regulations.gov including rules, proposed rules, notices, and supporting materials.

Data license: Public Domain (U.S. Government data) · Data source: Federal Register API & Regulations.gov API

comment_end_date
A FULL UTC INSTANT, not a calendar date, despite the column name: '2026-08-29T03:59:59Z' is 11:59:59 PM EASTERN on 2026-08-28. Federal comment periods close at 11:59:59 PM Eastern, so the UTC calendar date is ONE DAY LATER than the official deadline on every end-of-day close — 444,689 of the 444,690 populated rows (measured 2026-09-06). Convert to America/New_York before presenting a deadline, and compare with julianday(comment_end_date) > julianday('now'): a plain > datetime('now') is a TEXT comparison between two different formats and keeps already-closed dockets matching for up to ~20 hours. The sibling column on open_comments.documents WAS corrected to an Eastern calendar date (queue #498); this one is unchanged and still an instant — the two databases do not agree on grain. (queue #644)
comment_start_date
A FULL UTC INSTANT, not a calendar date, despite the column name — same grain as comment_end_date on this table. Convert to America/New_York before presenting it. (queue #644)

11 rows where docket_id = "EPA-R09-OAR-2025-3821" sorted by posted_date descending

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document_type 3

  • Supporting & Related Material 9
  • Proposed Rule 1
  • Rule 1

posted_year 1

  • 2026 11

agency_id 1

  • EPA 11
id agency_id docket_id title document_type subtype posted_date ▲ posted_year posted_month comment_start_date comment_end_date last_modified fr_doc_num open_for_comment withdrawn object_id
EPA-R09-OAR-2025-3821-0010 EPA Air Plan Approval; Arizona; Attainment Plan for the Hayden SO2 Nonattainment Area for the 1971 and 2010 Sulfur Dioxide National Ambient Air Quality Standards EPA-R09-OAR-2025-3821 F. Additional Documents Considered for Final Rulemaking Supporting & Related Material   2026-08-20T04:00:00Z 2026 8     2026-08-20T17:02:48Z   0 0 09000064b9439cf6
EPA-R09-OAR-2025-3821-0012 EPA Air Plan Approval; Arizona; Attainment Plan for the Hayden SO2 Nonattainment Area for the 1971 and 2010 Sulfur Dioxide National Ambient Air Quality Standards EPA-R09-OAR-2025-3821 Hayden SO2_Docket Index - Final Supporting & Related Material   2026-08-20T04:00:00Z 2026 8     2026-08-20T17:03:18Z   0 0 09000064b946d6ee
EPA-R09-OAR-2025-3821-0011 EPA Air Plan Approval; Arizona; Attainment Plan for the Hayden SO2 Nonattainment Area for the 1971 and 2010 Sulfur Dioxide National Ambient Air Quality Standards EPA-R09-OAR-2025-3821 G. Notice of Final Rulemaking Supporting & Related Material   2026-08-20T04:00:00Z 2026 8     2026-08-20T17:03:05Z   0 0 09000064b946d6de
EPA-R09-OAR-2025-3821-0008 EPA Air Plan Approval; Arizona; Attainment Plan for the Hayden SO2 Nonattainment Area for the 1971 and 2010 Sulfur Dioxide National Ambient Air Quality Standards EPA-R09-OAR-2025-3821 Air Quality State Implementation Plans; Approvals and Promulgations: Arizona; Attainment Plan for the Hayden SO2 Nonattainment Area for the 1971 and 2010 Sulfur Dioxide National Ambient Air Quality Standards Rule   2026-08-20T04:00:00Z 2026 8 2026-08-20T04:00:00Z   2026-08-20T16:52:55Z 2026-16989 0 0 09000064b946e134
EPA-R09-OAR-2025-3821-0009 EPA Air Plan Approval; Arizona; Attainment Plan for the Hayden SO2 Nonattainment Area for the 1971 and 2010 Sulfur Dioxide National Ambient Air Quality Standards EPA-R09-OAR-2025-3821 E. Public Comments and Related Documents Supporting & Related Material   2026-08-20T04:00:00Z 2026 8     2026-08-20T17:02:30Z   0 0 09000064b9439cf3
EPA-R09-OAR-2025-3821-0001 EPA Air Plan Approval; Arizona; Attainment Plan for the Hayden SO2 Nonattainment Area for the 1971 and 2010 Sulfur Dioxide National Ambient Air Quality Standards EPA-R09-OAR-2025-3821 Air Quality State Implementation Plans; Approvals and Promulgations: Arizona; Attainment Plan for the Hayden SO2 Nonattainment Area for the 1971 and 2010 Sulfur Dioxide National Ambient Air Quality Standards Proposed Rule   2026-03-04T05:00:00Z 2026 3 2026-03-04T05:00:00Z 2026-04-04T03:59:59Z 2026-04-04T09:00:24Z 2026-04339 0 0 09000064b91eefaa
EPA-R09-OAR-2025-3821-0006 EPA Air Plan Approval; Arizona; Attainment Plan for the Hayden SO2 Nonattainment Area for the 1971 and 2010 Sulfur Dioxide National Ambient Air Quality Standards EPA-R09-OAR-2025-3821 D. Notice of Proposed Rulemaking and TSDs Supporting & Related Material   2026-03-04T05:00:00Z 2026 3     2026-03-04T19:32:44Z   0 0 09000064b91dad66
EPA-R09-OAR-2025-3821-0005 EPA Air Plan Approval; Arizona; Attainment Plan for the Hayden SO2 Nonattainment Area for the 1971 and 2010 Sulfur Dioxide National Ambient Air Quality Standards EPA-R09-OAR-2025-3821 C. Additional Documents for Proposed Rulemaking Supporting & Related Material   2026-03-04T05:00:00Z 2026 3     2026-03-04T19:32:22Z   0 0 09000064b91dad5f
EPA-R09-OAR-2025-3821-0004 EPA Air Plan Approval; Arizona; Attainment Plan for the Hayden SO2 Nonattainment Area for the 1971 and 2010 Sulfur Dioxide National Ambient Air Quality Standards EPA-R09-OAR-2025-3821 B. State Plans, Rules, TSDs, and Correspondence Supporting & Related Material   2026-03-04T05:00:00Z 2026 3     2026-03-04T19:32:11Z   0 0 09000064b91daac5
EPA-R09-OAR-2025-3821-0002 EPA Air Plan Approval; Arizona; Attainment Plan for the Hayden SO2 Nonattainment Area for the 1971 and 2010 Sulfur Dioxide National Ambient Air Quality Standards EPA-R09-OAR-2025-3821 Hayden SO2_Docket Index - Proposal Supporting & Related Material   2026-03-04T05:00:00Z 2026 3     2026-03-04T19:31:37Z   0 0 09000064b91ef71e
EPA-R09-OAR-2025-3821-0003 EPA Air Plan Approval; Arizona; Attainment Plan for the Hayden SO2 Nonattainment Area for the 1971 and 2010 Sulfur Dioxide National Ambient Air Quality Standards EPA-R09-OAR-2025-3821 A. EPA Rulemakings, Guidance, Correspondence, and TSDs Supporting & Related Material   2026-03-04T05:00:00Z 2026 3     2026-03-04T19:31:57Z   0 0 09000064b91daa5f

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CREATE TABLE documents (
    id TEXT PRIMARY KEY,
    agency_id TEXT,
    docket_id TEXT REFERENCES dockets(id),
    title TEXT,
    document_type TEXT,
    subtype TEXT,
    posted_date TEXT,
    posted_year INTEGER,
    posted_month INTEGER,
    comment_start_date TEXT,
    comment_end_date TEXT,
    last_modified TEXT,
    fr_doc_num TEXT,
    open_for_comment INTEGER,
    withdrawn INTEGER,
    object_id TEXT
);
CREATE INDEX idx_docs_agency ON documents(agency_id);
CREATE INDEX idx_docs_docket ON documents(docket_id);
CREATE INDEX idx_docs_date ON documents(posted_date);
CREATE INDEX idx_docs_year ON documents(posted_year);
CREATE INDEX idx_docs_type ON documents(document_type);
CREATE INDEX idx_docs_frnum ON documents(fr_doc_num);
CREATE INDEX idx_docs_comment_end ON documents(comment_end_date) WHERE comment_end_date IS NOT NULL AND withdrawn = 0;
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