2019-15111: Designation of Areas for Air Quality Planning Purposes; Montana; Redesignation Request and Associated Maintenance Plan for East Helena SO2 Nonattainment Area
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On October 26, 2018, the Montana Department of Environmental Quality (MDEQ) submitted a request to the EPA for redesignation of the East Helena, Montana 1971 sulfur dioxide (SO<INF>2</INF>) National Ambient Air Quality Standards (NAAQS) nonattainment area (NAA) to attainment, and to approve a State Implementation Plan (SIP) revision for a maintenance plan of the East Helena area. After review and analysis of Montana's submittal, the EPA is proposing to redesignate the East Helena, Montana SO<INF>2</INF> nonattainment area to attainment for the 1971 primary 24-hour and annual, and secondary 3- hour SO<INF>2</INF> NAAQS, and to approve Montana's SIP revision for continued maintenance and attainment of the 1971 primary 24-hour and annual, and secondary 3-hour SO<INF>2</INF> NAAQS in East Helena, Montana.
The agency’s own summary, as published.
What this changes
Amends 1 part of the Code of Federal Regulations — the standing rules this notice rewrites.
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