EPA Power Plant & Emissions Compliance
Material regulatory developments from Environmental Protection Agency are tracked daily by Cresthaven Analytics. Over the last 90 days, 20 material briefs relevant to professionals operating in the energy, power & commodities sector have been published below. Each brief is sourced directly from the primary regulatory feed, summarized for institutional readers, and scored for materiality.
Recent material activity
A selection of recent published briefs; this is not a complete archive.
EPA reopens public comment on 2024 Texas SIP disapproval covering emissions during power plant maintenance activities
The EPA granted reconsideration on May 11, 2026 of its December 20, 2024 disapproval of a Texas state implementation plan governing visible emissions and particulate matter during planned maintenance, startup, and shutdo…
Read the full EPA Power Plant & Emissions Compliance brief →EPA proposes consent decree setting deadlines for overdue California and Colorado ozone SIP final actions
The EPA published notice on September 24, 2026 of a proposed consent decree in Center for Biological Diversity and Center for Environmental Health v. Lee Zeldin, No. 4:25-cv-10007-JST. The decree would resolve citizen-su…
Read the full EPA Power Plant & Emissions Compliance brief →EPA proposes to approve North Carolina second 10-year ozone maintenance plan for Charlotte-Rock Hill area through 2035
EPA published a proposed rule on September 23, 2026 to approve North Carolina's second 10-year maintenance plan for the 2008 8-hour ozone standard covering the bi-state Charlotte-Rock Hill area. The proposal incorporates…
Read the full EPA Power Plant & Emissions Compliance brief →EPA repeals most 2024 carbon pollution standards for fossil fuel-fired power plants in final rule
The EPA issued a final rule on September 17, 2026 repealing most of the 2024 Carbon Pollution Standards for greenhouse gas emissions from fossil fuel-fired electric generating units. The repeal eliminates emission guidel…
Read the full EPA Power Plant & Emissions Compliance brief →EPA proposes to rescind statutory authority for all power plant greenhouse gas regulation under Clean Air Act Section 111
The EPA published a supplemental proposed rulemaking on September 17, 2026, proposing that Clean Air Act Section 111 does not authorize regulation of power plant greenhouse gas emissions. The proposal would rescind the a…
Read the full EPA Power Plant & Emissions Compliance brief →EPA proposes to approve Indiana's state-run coal combustion residuals permit program under federal solid-waste law
EPA published a proposed approval on September 16, 2026 of Indiana's partial Coal Combustion Residuals permit program, submitted by the Indiana Department of Environmental Management. If finalized, Indiana's program oper…
Read the full EPA Power Plant & Emissions Compliance brief →EPA proposes to approve Wisconsin's state-run coal combustion residuals permit program under federal solid-waste law
EPA published a proposed approval on September 11, 2026 of the Wisconsin Department of Natural Resources' partial coal combustion residuals permit program. If finalized, Wisconsin's program would operate in place of the …
Read the full EPA Power Plant & Emissions Compliance brief →EPA proposes to repeal its 2024 partial disapproval of North Dakota's regional haze plan and approve the previously rejected provisions
The EPA published a proposed rule on September 9, 2026 to repeal its December 2024 partial approval and partial disapproval of North Dakota's regional haze State Implementation Plan for the second implementation period. …
Read the full EPA Power Plant & Emissions Compliance brief →EPA approves New York SIP satisfying good neighbor interstate transport requirements for the 2010 SO2 air quality standard
EPA issued final approval on September 9, 2026 of New York's State Implementation Plan addressing interstate transport obligations under the Clean Air Act's good neighbor provision for the 2010 one-hour SO2 primary stand…
Read the full EPA Power Plant & Emissions Compliance brief →EPA issues SRE decisions on 34 petitions for the 2025 RFS compliance year
The EPA announced final decisions on 34 small refinery exemption petitions under the Renewable Fuel Standard program for the 2025 compliance year, published September 2, 2026. The agency also reissued one 2024 compliance…
Read the full EPA Power Plant & Emissions Compliance brief →EPA proposes to approve Puerto Rico negative declaration exempting territory from oil and gas greenhouse gas emission guidelines
The EPA published a proposed rule on August 27, 2026 to approve a negative declaration submitted by Puerto Rico certifying that no existing crude oil or natural gas facilities in the territory are subject to the greenhou…
Read the full EPA Power Plant & Emissions Compliance brief →EPA proposes to approve Oklahoma regional haze SIP revision affecting AEP/PSO Northeastern Power Station source-specific requirements
The EPA published a proposed approval on August 27, 2026 of Oklahoma's March 12, 2026 State Implementation Plan revision for the regional haze program's first implementation period. The proposal addresses revised source-…
Read the full EPA Power Plant & Emissions Compliance brief →EPA finalizes Arizona SIP approval for Hayden SO2 nonattainment area under 1971 and 2010 NAAQS
The EPA issued a final rule on August 20, 2026 approving revisions to Arizona's state implementation plan for the Hayden SO2 nonattainment area. The revisions cover attainment demonstration, emissions limitations, contro…
Read the full EPA Power Plant & Emissions Compliance brief →EPA proposes partial approval of South Carolina NOx control and source testing SIP revisions spanning 2007 to 2022 submissions
The EPA has proposed partial approval and partial conditional approval of South Carolina's State Implementation Plan revisions covering nitrogen oxides control requirements and source testing standards. The proposal addr…
Read the full EPA Power Plant & Emissions Compliance brief →EPA proposes approval of Missouri SIP elements for 2015 ozone standard in St. Louis nonattainment area
The EPA published a proposed rule on August 14, 2026 to approve three Missouri state implementation plan elements for the 2015 8-hour ozone standard in the Missouri portion of the St. Louis bi-state nonattainment area. T…
Read the full EPA Power Plant & Emissions Compliance brief →EPA issues final Clean Data Determination suspending ozone SIP planning obligations for Illinois portion of St. Louis nonattainment area
EPA finalized a Clean Data Determination on August 13, 2026 for the Illinois portion of the St. Louis, MO-IL nonattainment area under the 2015 ozone NAAQS, based on certified 2023-2025 monitoring data. The determination …
Read the full EPA Power Plant & Emissions Compliance brief →EPA finalizes clean data determination for Missouri portion of St. Louis ozone nonattainment area, suspending state planning obligations
On August 13, 2026, the EPA issued a final clean data determination finding that the Missouri portion of the St. Louis bi-state nonattainment area has achieved attainment of the 2015 8-hour ozone standard. This suspends …
Read the full EPA Power Plant & Emissions Compliance brief →EPA proposes to approve Virginia SIP revision transferring air permit authority from Board to VADEQ
EPA published a proposed approval on August 13, 2026 of a Virginia state implementation plan revision submitted by VADEQ. The revision transfers permit, order, and variance authority from the Virginia State Air Pollution…
Read the full EPA Power Plant & Emissions Compliance brief →EPA proposes to remove New Hampshire from the Ozone Transport Region under Clean Air Act petition
The EPA published a proposed rule on August 11, 2026 responding to a December 24, 2025 petition from New Hampshire to exit the Ozone Transport Region. If finalized, the proposal would relieve New Hampshire of the enhance…
Read the full EPA Power Plant & Emissions Compliance brief →EPA defers Clean Air Act sanctions against Maricopa County pending final approval of gasoline loading rules
The EPA issued an interim final determination on August 11, 2026, deferring offset and highway sanctions against Arizona's Maricopa County Air Quality Department. The sanctions had been triggered by a 2025 limited disapp…
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