Open for CommentEPA· Environmental Protection AgencyProposed Rule

Air Quality State Implementation Plans; Approvals and Promulgations: Oregon; Klamath Falls PM2.5 Redesignation to Attainment and Maintenance Plan

Introduced March 4, 2026Comment period ends April 4, 2026View on regulations.gov ↗
💬 Closes in 16 daysDeadline: Apr 4, 2026

What This Means

The EPA is officially recognizing that the Klamath Falls area in Oregon has improved its air quality enough to meet federal clean air standards for fine particle pollution, a type of air pollution called PM2.5 that can harm people's health. This change means Oregon will have less stringent air quality requirements for that area going forward, though the state still needs to maintain these improvements over the next ten years. This matters because it reflects progress in reducing pollution in Klamath Falls, but residents and local officials need to stay vigilant to keep the air clean and avoid having stricter rules reimposed if pollution levels rise again.

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Details

TypeFederal Regulation
AgencyEPA · Environmental Protection Agency
Regulations.gov IDEPA-R10-OAR-2025-0052-0003
IntroducedMarch 4, 2026
Comment DeadlineApril 4, 2026

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