Data / Federal rules / 2026-04333

Air Plan Approval; OR; Klamath Falls PM2.5 Redesignation to Attainment and Maintenance Plan

The Environmental Protection Agency published this proposed rule in the Federal Register on March 4, 2026. Comments closed on April 3, 2026.

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What the agency says

The Environmental Protection Agency (EPA) proposes to approve an August 20, 2024 request by the Oregon Department of Environmental Quality (Oregon) to revise the attainment plan for the Klamath Falls, Oregon, nonattainment area; redesignate the Klamath Falls nonattainment area to attainment for the 2006 24-hour fine particulate matter (PM<INF>2.5</INF>) National Ambient Air Quality Standard (NAAQS); and approve into the Oregon state implementation plan (SIP) a maintenance plan for the area that demonstrates continued attainment through 2037. This proposed rulemaking includes approving the motor vehicle emission budget for the area and approving updated state rules and the Klamath County Clean Air Ordinance, to be incorporated by reference. EPA proposes these actions pursuant to the Clean Air Act (CAA or the Act).

Key facts

Document number: 2026-04333
Type: Proposed rule
Action: Proposed rule
Agency: Environmental Protection Agency
Published: March 4, 2026
Comments due: April 3, 2026
Dates: Comments must be received on or before April 3, 2026.
Docket: EPA-R10-OAR-2025-0052; FRL-12592-01-R10
Code of Federal Regulations: 40 CFR 52; 40 CFR 81
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: 12

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 March 2026

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.