Indiana's SO2 Cleanup Plan Wins EPA Approval at Last
Published Date: 8/14/2025
Rule
Summary
The EPA says Huntington County, Indiana didn’t meet the clean air goal for sulfur dioxide by April 9, 2023. But good news: Indiana’s updated plan to fix this is approved and includes new rules to cut pollution. This means cleaner air is on the way, with clear deadlines and enforceable limits to keep things on track.
Analyzed Economic Effects
2 provisions identified: 1 benefits, 1 costs, 0 mixed.
Indiana SIP Approved to Attain 2010 SO2 Standard
If you live in the Huntington County, Indiana nonattainment area, the EPA approved Indiana’s updated plan to achieve the 2010 Sulfur Dioxide (SO2) National Ambient Air Quality Standard. The approval notes Indiana’s attainment demonstration and required Clean Air Act planning elements were added to the State Implementation Plan, and EPA proposed this approval on June 18, 2025 with no adverse comments.
New Enforceable SO2 Emission Limits
Indiana’s SIP revisions include an order from the Indiana Department of Environmental Management Commissioner that contains enforceable emission limits for sources in the Huntington County nonattainment area. Those enforceable limits are now approved into the SIP and will apply to regulated emitters as part of the plan to attain the 2010 SO2 NAAQS.
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