EPA Approves Indiana's Ozone Visibility Safeguard Plan
Published Date: 4/10/2026
Proposed Rule
Summary
The EPA is proposing to approve Indiana’s plan to keep the air clean and protect visibility for the 2015 ozone air quality rules. This means Indiana promises to stop pollution that could mess up the clear skies in other states. People and businesses in Indiana should know this plan helps keep the air fresh without adding new costs, and comments are open until May 11, 2026.
Analyzed Economic Effects
3 provisions identified: 3 benefits, 0 costs, 0 mixed.
EPA proposes Indiana visibility approval
On April 10, 2026, the EPA proposed to approve Indiana's November 2, 2018 State Implementation Plan submission for the 2015 ozone standard to satisfy the CAA "Prong 4" visibility requirement. The EPA says Indiana's fully approved regional haze SIP (approved January 26, 2026) means Indiana's SIP prohibits emissions that would interfere with visibility protection measures in other States.
No new federal costs for Indiana businesses
The EPA states this approval merely approves State law as meeting Federal requirements and "does not impose additional requirements beyond those imposed by State law." The action is also certified as not having a significant economic impact on a substantial number of small entities under the Regulatory Flexibility Act.
Approval excludes Indian reservation land
The EPA states the SIP approval is not approved to apply on any Indian reservation land or other area where a Tribe has demonstrated jurisdiction. The EPA also states the rule will not impose substantial direct costs on Tribal governments.
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Key Dates
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