SIP Approval: Connecticut (updates to new source review procedural requirements, substantive review criteria, provisions related to the control of volatile organic compounds, and infrastructure requirements for the 2015 ozone NAAQS).

EPA granted the Rhode Island Department of Environmental Management the authority to implement and enforce the amended Rhode Island Code of Regulations, Control of Emissions from Organic Solvent Cleaning, and the General Definitions Regulation in place of the Halogenated Solvent NESHAP.

SIP Proposal: North Carolina (modification to emission control standards).

SIP Approval: Rhode Island (revisions to regulation for controlling emissions from organic solvent cleaning).

SIP Proposal: Indiana (revisions to volatile organic compound rules).

SIP Proposal: California (issuance of permits for new and modified major sources in nonattainment areas in the Great Basin Unified Air Pollution Control District).

SIP Proposal: New York (reasonably available control technology requirements for the 2008 and 2015 eight-hour ozone NAAQS, ozone transport region requirements for the 2015 ozone NAAQS, ozone nonattainment new source review program requirements, nonattainment emission inventory requirements, clean fuels for fleets requirements, and reasonable further progress plans and motor vehicle emissions budgets for the 2008 ozone NAAQS).

SIP Proposal: Maryland (regional haze).

EPA finalized amendments to the new source performance standards for electric arc furnaces and argon-oxygen decarburization vessels in the steel industry pursuant to the review required by the CAA.

EPA announced the availability of data on new or revised default allocations of Cross-State Air Pollution Rule Nitrogen Oxide Ozone Season Group 3 emissions allowances to existing electricity generating units for the 2023-2025 control periods.