EPA Nods to Montana's 2015 Ozone Air Plan Updates
Published Date: 7/16/2025
Proposed Rule
Summary
The EPA is giving a thumbs-up to Montana’s plan to keep the air clean and meet 2015 ozone pollution rules. This update makes sure Montana’s air quality program is strong and uses the latest science for tracking pollution. People in Montana can expect better air quality management without new costs or delays.
Analyzed Economic Effects
2 provisions identified: 2 benefits, 0 costs, 0 mixed.
EPA proposes approval of Montana SIP
If you live in Montana, the EPA is proposing to approve the state's plan showing Montana’s air quality program meets the Clean Air Act infrastructure requirements for the 2015 ozone National Ambient Air Quality Standards (NAAQS). The proposal says Montana’s program is adequate to meet its responsibilities under the Clean Air Act and that this action will keep the state on track to manage ozone pollution without new costs or delays.
Montana SIP to adopt latest air quality models
The EPA is also proposing to approve Montana’s update to its State Implementation Plan that incorporates the most current version of the "Guideline on Air Quality Models." If you live in Montana, this means the state will use the latest models and science for tracking and managing air pollution tied to the 2015 ozone NAAQS.
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Key Dates
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