EPA Backs Arizona Cleaner Gasoline Program Changes
Published Date: 6/23/2026
Proposed Rule
Summary
The EPA wants to approve Arizona’s updates to cleaner gasoline and winter fuel rules that help cut pollution in Phoenix and Tucson. They’re also getting rid of an old gasoline program in parts of Maricopa and Pima counties. These changes won’t cost extra or add new rules, and folks have until July 23, 2026, to share their thoughts.
Analyzed Economic Effects
3 provisions identified: 3 benefits, 0 costs, 0 mixed.
EPA proposes approval of Arizona CBG updates
The EPA is proposing to approve Arizona's revisions to its Cleaner Burning Gasoline (CBG) program (submitted June 17, 2021 with supplements in 2025). The agency says these revisions are administrative, clarify requirements, and enhance program flexibility to reduce ozone, carbon monoxide, and particulate matter, and that the proposed approval will not impose any additional costs or regulatory burdens or affect gasoline supply or price in the Phoenix metropolitan area.
New fuel testing and additive flexibilities
Arizona's SIP revision allows specific technical changes such as permitting isobutanol as a fuel additive, using the CARBOB model as an alternative testing method, adjustments to Reid Vapor Pressure (RVP) outside the summer ozone season, limits on MTBE, allowances for third-party terminals to blend transmix, and recertification of blendstock when approved oxygenates differ from supplier instructions. The EPA proposes these updates do not create a "new fuel" under the Energy Policy Act provisions and says they will not cause supply or price impacts.
Removal of Arizona Gasoline Set-Aside program
The EPA is proposing to approve Arizona's repeal and removal of the Gasoline Set-Aside (GSA) program from the SIP for the 1971 carbon monoxide nonattainment area covering Maricopa County and a portion of Pima County. The EPA states this change is administrative, will be incorporated into the federally enforceable SIP if approved, and will not impose additional costs or affect gasoline supply or price.
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
2026-13667, 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!
2026-12927, U.S. Ecology Nevada, Inc. High Mercury Subcategory Wastes Land Disposal Restrictions Variance
The EPA is giving U.S. Ecology Nevada a special green light to handle and dispose of high-mercury waste a bit differently than usual. This means mercury waste treated in Pennsylvania can now be safely sent to U.S. Ecology’s Nevada site for disposal under new rules starting July 27, 2026. This change helps protect people and the environment while keeping mercury waste management efficient and cost-effective.
2026-11047, National Emission Standards for Hazardous Air Pollutants From Hazardous Waste Combustors: Residual Risk and Technology Review
The EPA just updated rules for places that burn hazardous waste, like incinerators and boilers, to keep the air safe and clean. They confirmed current standards work well but added new limits on harmful gases like hydrogen fluoride and hydrogen cyanide. These changes start June 3, 2026, and include easier electronic reporting and some new rules for startup and shutdown times—helping protect health without big costs.
2026-10641, Hazardous and Solid Waste Management System: Disposal of Coal Combustion Residuals From Electric Utilities; Federal CCR Permit Program; Reopening of Comment Period
The EPA is reopening the comment period until June 29, 2026, for its proposed rule to create a federal permit program for safely disposing of coal ash from power plants. This affects electric utilities that handle coal waste and aims to improve environmental safety while possibly impacting their costs. Now’s the time for everyone to share their thoughts and help shape the rules!
2026-10387, Phasedown of Hydrofluorocarbons: Reconsideration of Certain Regulatory Requirements Promulgated Under the Technology Transitions Provisions of the American Innovation and Manufacturing Act of 2020
The EPA is updating rules to phase down hydrofluorocarbons (HFCs), chemicals used in cooling systems like refrigerators and air conditioners. These changes affect businesses in refrigeration, supermarkets, semiconductor manufacturing, and more, allowing some older equipment made before 2025 to keep running. The new rules kick in on July 27, 2026, helping industries transition smoothly while cutting harmful emissions.
Previous / Next Documents
Previous: 2026-12543, Air Plan Approval; Colorado; RACT Requirements for the 2008 8-Hour Ozone Standard for the Denver Metro/North Front Range Nonattainment Area
The EPA is proposing to approve Colorado’s plan to control smog-causing pollution in the Denver Metro and North Front Range area. This plan updates rules for certain polluters and fixes past issues, helping the region meet clean air goals. People and businesses in this area should note the July 23, 2026 deadline to share their thoughts on the plan.
Next: 2026-12559, Federal Acquisition Regulation: Revolutionary Federal Acquisition Regulation Overhaul Parts 1, 2, 4, 33, 39, 40, and 53
The government is shaking up the Federal Acquisition Regulation to cut red tape and save taxpayer money. This big update affects anyone who works with federal contracts, making rules simpler and smarter. Comments are open until July 23, 2026, so get ready for a smoother, faster way to do business with the feds!