Data / Federal rules / 2024-20721

Air Plan Approval; New Hampshire; Ambient Air Quality Standards

The Environmental Protection Agency published this final rule in the Federal Register on September 13, 2024. It took effect on October 15, 2024.

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What the agency says

The Environmental Protection Agency (EPA) is approving most of a State Implementation Plan (SIP) revision submitted by the State of New Hampshire. This revision updates the State regulation containing ambient air quality standards. EPA is approving all the State's updated standards, except the primary annual fine particle (PM<INF>2.5</INF>) standard, which we are conditionally approving because it does not match EPA's current National Ambient Air Quality Standard for PM<INF>2.5</INF>. This action is being taken in accordance with the Clean Air Act.

Key facts

Document number: 2024-20721
Type: Final rule
Action: Final rule
Agency: Environmental Protection Agency
Published: September 13, 2024
Takes effect: October 15, 2024
Dates: This rule is effective on October 15, 2024.
Docket: EPA-R01-OAR-2024-0255; FRL-12071-02-R1
Code of Federal Regulations: 40 CFR 52
Topics: Air pollution control; Carbon monoxide; Environmental protection; Incorporation by reference; Intergovernmental relations; Lead; Nitrogen dioxide; Ozone; Particulate matter; Reporting and recordkeeping requirements; Sulfur oxides; Volatile organic compounds
Pages: 3

The document on federalregister.gov PDF

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Everything from the Environmental Protection Agency · Rules on air pollution control · Rules on carbon monoxide · Rules on environmental protection · Published in September 2024

Read from the Federal Register API, last updated 2026-10-23. The document on federalregister.gov is the official record; dates and dockets can change through later corrections. Free to reuse with credit to SpecStream under CC BY 4.0.