EPA Approves Oklahoma Air Permit Rule Updates
Published Date: 7/2/2026
Rule
Summary
The EPA is giving a thumbs-up to Oklahoma’s updated air pollution rules, making it easier to manage new pollution sources and keep the air cleaner. These changes affect businesses needing permits to build or change facilities and kick in starting August 3, 2026. The updates won’t cost small businesses a fortune but will help Oklahoma stay on track with clean air goals.
Analyzed Economic Effects
4 provisions identified: 1 benefits, 2 costs, 1 mixed.
State SIP Revisions Become Federally Enforceable
If you operate or own a facility in Oklahoma that is subject to air permits, the EPA approved revisions to the Oklahoma State Implementation Plan (SIP) and those approved state rules become federally enforceable under Clean Air Act sections 110 and 113 as of August 3, 2026.
Minor NSR Revisions Approved
The EPA approved revisions to Oklahoma's minor New Source Review (NSR) permitting provisions, including changes to OAC 252:100-7-1.1 (definitions) and OAC 252:100-7-2 (requirements for permits for minor facilities); these revisions are part of the SIP changes effective August 3, 2026.
Construction May Begin Before Permit Issuance
The EPA approved state language (including OAC 252:100-7-2(b)(5) and OAC 252:100-8-4(a)(1)(D)) that allows permit applicants to begin construction prior to receiving a construction permit; the Oklahoma DEQ retains authority to deny the permit regardless of investments made before permit issuance. These approvals are effective August 3, 2026.
EPA Certifies No Significant Small Business Impact
The EPA certified under the Regulatory Flexibility Act that this approval will not have a significant economic impact on a substantial number of small entities; the agency stated sections 603 and 604 of the RFA do not apply and the rule approves State choices rather than imposing new federal requirements.
Personalized for You
How does this regulation affect your finances?
Personalize government policy and PRIA will tell you what this federal register document means for your household, plus every other regulation we track. PRIA reads each provision against your financial profile to show you exactly what matters to your wallet.
Key Dates
Department and Agencies
Related Federal Register Documents
2026-19072, Rescission of the Greenhouse Gas Findings for Fossil Fuel-Fired Power Plants and Repeal of Regulations for Power Plant Greenhouse Gas Emissions Under Clean Air Act Section 111
The EPA is proposing to cancel all greenhouse gas rules for fossil fuel power plants, saying the law doesn’t let them regulate these emissions for climate reasons. This change affects power plants across the U.S. and could impact future pollution limits and costs. Comments on this proposal are open until November 2, 2026, so now’s the time to speak up!
2026-19071, Partial Repeal of the Carbon Pollution Standards for Fossil Fuel-Fired Electric Generating Units
The EPA is rolling back most of the 2024 rules that limited carbon pollution from fossil fuel power plants. This change affects coal and gas plants by easing some strict limits on emissions and carbon capture technology. The new rules kick in on November 16, 2026, potentially saving money for power plants but raising questions about pollution control.
2026-18317, Updated Definition of “Waters of the United States”
The purpose of this supplemental notice of proposed rulemaking is for the U.S. Environmental Protection Agency (EPA) and the Department of the Army ("the agencies") to supplement and seek additional comment on certain aspects of an earlier proposal, published on November 20, 2025, to revise the regulations defining the scope of waters federally covered under the Clean Water Act in light of the U.S. Supreme Court's 2023 decision in Sackett v. Environmental Protection Agency. As stated in the agencies' November 20, 2025 Notice of Proposed Rulemaking (NPRM), the agencies intend for this rulemaking to provide greater regulatory certainty and increase Clean Water Act program predictability and consistency by clarifying the definition of "waters of the United States." After consideration of the public comments received on the NPRM, the agencies are issuing this notice to supplement the NPRM with additional regulatory options on certain aspects of the proposed rule.
2026-14112, Amendments and Nonconformance Penalties for Model Year 2027 and Later Heavy-Duty Highway Engines and Amendments to Inducement Provisions for SCR-Equipped Diesel Engines
Starting with model year 2027, the EPA is updating rules for big truck engines to make sure they last longer and pollute less. They’re also letting engine makers pay penalties if their engines don’t meet standards, and tightening rules for special pollution-control systems on diesel engines. These changes affect truck and engine makers and kick in soon, with public feedback due by August 29, 2026.
2026-13667, Minor New Source Review Program Air Permitting Public Participation Requirements for State Implementation Plans
The EPA wants to give states more freedom to decide how much public input is needed when approving small air pollution sources or changes. This means local air agencies can tailor public participation to fit their community’s needs while still protecting air quality. If you’re involved in air permits, watch for comment deadlines and possible virtual hearings this summer!
2026-13263, Revisions To Establish the Sixth Unregulated Contaminant Monitoring Rule (UCMR 6) for Public Water Systems
The EPA is rolling out the sixth Unregulated Contaminant Monitoring Rule (UCMR 6) to check for new, sneaky chemicals in public drinking water. Big water systems serving 3,300+ people and some smaller ones will test for 30 different contaminants, including certain PFAS and pesticides, to keep our water safe. Comments and feedback are open until late August 2026, and the EPA will host fun online meetings to chat about the plan!
Previous / Next Documents
Previous: 2026-13396, Air Plan Approval; Delaware; 2006 24-Hour Fine Particulate Matter Limited Maintenance Plan for the Philadelphia Nonattainment Area
The EPA just gave a thumbs-up to Delaware’s plan to keep the air clean in New Castle County, part of the Philadelphia area, for another 10 years. This plan focuses on controlling tiny pollution particles called PM2.5 to meet health standards. Starting August 3, 2026, this approval helps ensure cleaner air without extra costs or delays for local transportation projects.
Next: 2026-13406, Safety Zone; Kanawha River, Charleston, WV
On July 4, 2026, the Coast Guard is setting up a bigger safety zone on the Kanawha River in Charleston, WV, to keep everyone safe during the special America 250th fireworks show. From 9:15 p.m. to 10 p.m., boats and people can’t enter the area between mile markers 57.5 and 60.5 unless they get special permission. This temporary rule helps protect folks, boats, and the river from fireworks dangers without costing anyone money.