Oklahoma's Air Rules Get EPA Nod for Cleaner Permits
Published Date: 11/17/2025
Proposed Rule
Summary
Oklahoma is updating its air pollution rules to make sure new factories and projects follow cleaner standards. These changes affect businesses applying for air permits and help keep the air safer for everyone. You’ve got until December 17, 2025, to share your thoughts before the updates go live—no extra costs are expected, just clearer rules!
Analyzed Economic Effects
6 provisions identified: 2 benefits, 2 costs, 2 mixed.
New Enhanced NSR Streamlining Pathway
Oklahoma added an "enhanced NSR" pathway that lets sources with existing part 70 operating permits incorporate NSR permit terms into their operating permit by administrative amendment. The enhanced pathway is limited to sources with existing part 70 permits and keeps EPA review (45 days) and a 30-day public comment period on draft operating permits in the process.
10 TPY Minor NSR Permit Threshold
Oklahoma added a 10 tons per year (TPY) threshold for changes at sources with existing part 70 permits: any physical change that would increase potential to emit by more than 10 TPY of any regulated pollutant now requires a minor NSR construction permit. Projects below 10 TPY are exempt from that construction-permit requirement but still must follow part 70 permit modification rules.
Start Construction Before Permit Issued
Oklahoma added provisions allowing an applicant at a Subchapter 8 major source to begin construction after submitting an administratively complete minor NSR application, but not to operate the unit. The rule says construction is at the applicant's risk and expense, the DEQ can deny the permit, and federal requirements (e.g., NSPS/NESHAP) still apply.
EPA Proposal: Approve Oklahoma Minor NSR Program
EPA proposes to find that Oklahoma's OAC 252:4 and OAC 252:100, Subchapter 8 satisfy federal minor NSR requirements (40 CFR 51.160-51.164), making Subchapter 8 an approvable minor NSR program and removing older Regulation 1.4.1/1.4.2 provisions from the SIP.
More Public Notice Posted Online
Oklahoma requires the DEQ to post draft Tier II and Tier III individual construction permits on its website and provide a 30-day opportunity for public comment (in addition to newspaper notice). The DEQ must also post Tier I individual construction-permit opportunities for 30 days on the agency website.
50% 'Reasonable Possibility' Recordkeeping Rule
Oklahoma adopted 'reasonable possibility' criteria for projects using the actual-to-projected-actual test: pre- and post-change recordkeeping and reporting apply when projected emissions are at least 50% of federal significance levels. Oklahoma also requires pre-change recordkeeping for all projects using the actual-to-projected-actual method.
Your PRIA Score
Personalized for You
How does this regulation affect your finances?
Sign up for a PRIA Policy Scan to see your personalized alignment score for this federal register document and every other regulation we track. We analyze your financial profile against policy provisions to show you exactly what matters to your wallet.
Key Dates
Department and Agencies
Related Federal Register Documents
2026-10086 — Extending the Compliance Deadline for the PFOA and PFOS Maximum Contaminant Levels
The EPA is giving water systems more time to meet safety rules for two harmful chemicals, PFOA and PFOS, by extending the deadline from April 2029 to April 2031 if they ask for it. This helps water providers get ready without rushing, keeping our drinking water safe. The EPA wants your thoughts and will hold a public hearing in July 2026 to hear from everyone.
2026-10085 — Rescission of Regulatory Determinations and Removal of Related Provisions for Four PFAS Substances (PFHxS, PFNA, HFPO-DA (GenX), and the Mixture of These Three PFAS Plus PFBS)
The EPA is proposing to undo its rules for four PFAS chemicals (PFHxS, PFNA, GenX, and a mix including PFBS) in drinking water because the original process wasn’t done right. This means public water systems won’t have to monitor or treat these chemicals for now. People and water providers should weigh in by July 20, 2026, and a virtual hearing happens July 7.
2026-09895 — Effluent Limitations Guidelines and Standards for the Steam Electric Power Generating Point Source Category-Unmanaged Combustion Residual Leachate
The EPA is updating rules for steam electric power plants to better control dirty water leaking from leftover coal waste. This change affects existing power plants and is expected to save up to $1 billion a year while protecting water quality. Comments on the proposal are open until June 17, 2026, so now’s the time to speak up!
2026-09524 — Begin Actual Construction in the New Source Review (NSR) Preconstruction Permitting Program
The EPA is updating rules about when companies can start building big projects that might affect air quality. Now, they can begin building parts that don’t release pollution before getting a full air permit, making things clearer and easier. This change mainly affects businesses planning major construction and could speed up projects without extra costs, but comments are due by June 29, 2026.
2026-09179 — Definition of Hazardous Waste Applicable to Corrective Action for Releases From Solid Waste Management Units; Withdrawal
The EPA has decided to cancel its plan to change the rules about what counts as hazardous waste for cleaning up pollution at certain waste sites. This means businesses and cleanup crews won’t have to deal with the confusing new rules that were proposed. The withdrawal takes effect immediately, so no extra costs or changes will happen right now.
2026-08750 — Extension of Postponement of Effectiveness for Certain Provisions of Trichloroethylene (TCE); Regulation Under the Toxic Substances Control Act (TSCA)
The EPA is hitting the pause button again on some rules about a chemical called TCE, which is used in workplaces. This means certain limited uses of TCE won’t have to follow new restrictions just yet, while courts review the rules. If you work with TCE, this delay gives you more time before changes kick in, starting May 18, 2026.
Previous / Next Documents
Previous: 2025-19927 — Proposal of Special Measure Regarding Transactions Involving Ten Mexican Gambling Establishments as a Class of Transactions of Primary Money Laundering Concern
FinCEN is proposing new rules to stop money laundering linked to ten gambling spots in Mexico. U.S. banks won’t be allowed to open or keep accounts that help these places move money, and they’ll need to watch their accounts extra carefully. Comments on this plan are open until December 17, 2025, so everyone has a chance to weigh in!
Next: 2025-19992 — Approval of Source-Specific Air Quality Implementation Plan; New York; Calpine JFK Energy Center
The EPA is giving a thumbs-up to New York’s plan to cut pollution from six emergency boilers at the Calpine JFK Energy Center near JFK Airport. This update helps keep the air cleaner by controlling smog-causing nitrogen oxides (NOX) and meets all clean air rules. If you want to share your thoughts, make sure to comment by December 17, 2025!