Air and Radiation
This page shows all of the pages at www.epa.gov that are tagged with Air and Radiation.
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EPA Deputy Administrator Fotouhi Visits Auto Supply Facilities in Southeast Michigan, Advances Key Agency Pillar
Earlier this week, EPA Deputy Administrator David Fotouhi traveled around Southeast Michigan to advance a key pillar of the Trump EPA’s Powering the Great American Comeback initiative—protecting and bringing back American auto jobs.
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EPA Proposes Repeal of 2024 Nonattainment Decision for Utah’s Northern Wasatch Front to Prevent Area from Being Penalized for Foreign Emissions
Press release about proposed decision to rescind Northern Wasatch Front nonattainment
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EPA Proposes Repeal of 2024 Nonattainment Decision for Utah’s Northern Wasatch Front to Prevent Area from Being Penalized for Foreign Emissions
Today, U.S. EPA proposed repealing the Biden Administration’s December 2024 decision to reclassify Utah’s Northern Wasatch Front from a “Moderate” to a “Serious” nonattainment area under the 2015 Ozone National Ambient Air Quality Standards.
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Administrator Zeldin Wraps Up 6-Stop Nevada Swing
EPA Administrator Lee Zeldin spent three days in Nevada, for a variety of events focused on EPA equities in the state.
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EPA Deputy Administrator Fotouhi Delivers Earth Day Message
On Tuesday, April 22, 2026, U.S. Environmental Protection Agency (EPA) Deputy Administrator David Fotouhi released the agency’s Earth Day message recommitting EPA’s mission in protecting human health and the environment.
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EPA Issues Title V Permitting Guidance to Ensure Certainty for American Businesses and Alleviate Permitting Backlogs
EPA issued guidance to streamline the Clean Air Act (CAA) title V operating permit renewal process, a move which will provide certainty for businesses operating across the country.
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Administrator Zeldin Announces Selection of Members to the Science Advisory Board
EPA Administrator Lee Zeldin is announcing the selection of new members to the Science Advisory Board (SAB).
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EPA Proposes Approving Maricopa County’s Innovative Emission Reduction Credits Plan for Facilities to Grow the Economy While Ensuring Clean Air
EPA is proposing to approve Maricopa County’s innovative air quality 205 rule, “Emission Offsets Generated by Voluntary Mobile Source Emission Reductions,” to support Arizona’s economic expansion while maintaining clean air for the region.
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EPA Announces Canton, Ohio, Area Now Meets the Clean Air Act Standard for Lead
Air monitoring consistently finds the Canton area meets the lead air quality standard, protecting public health and reducing harmful pollution.
Today, U.S. Environmental Protection Agency (EPA) announced the Canton, Ohio, area now meets the National Ambient Air Quality Standard for lead under the Clean Air Act and is proposing to redesignate the area to “attainment.”
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EPA proposes to redesignate Cleveland area to “attainment” for ozone; area now meets national air quality standards
Cleaner air for Northeast Ohio as key pollutants drop more than 40% in about five years
U.S. Environmental Protection Agency (EPA) is proposing to redesignate the Cleveland area to “attainment” for ground-level ozone after three years of air monitoring show the region meets the national health-based standard.
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EPA Determines Phoenix-Mesa Area Will Not Be Unfairly Punished for International Emissions
Agency Finalizes Use of Clean Air Act International Transport Provision to Prevent Phoenix-Mesa from a Higher Non-Attainment Determination
EPA finalized its determination to not reclassify the Phoenix-Mesa area from Moderate to Serious nonattainment under the 2015 Ozone National Ambient Air Quality Standards (NAAQS).
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EPA Continues to Unleash Domestic Energy with Revisions to Burdensome, Unworkable Biden-era Oil and Natural Gas Regulations, Saving Americans Billions in Energy Costs
Final rule to save $2.5 billion while producing cleanest energy in the world
EPA continues to unleash domestic energy with revisions to burdensome, unworkable Biden-era oil and natural gas regulations, saving Americans billions in energy costs.
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EPA Expedites Review of Requests from New Hampshire Under the Clean Air Act
EPA is expeditiously working to review the state of NH's two Clean Air Act submissions seeking to repeal the state's vehicle inspection and maintenance program and to remove the state from the Ozone Transport ahead of the typical 18-month timeline.
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EPA redesignates Detroit area to “attainment” for sulfur dioxide; area now meets national air quality standards
Cleaner air for Detroit as sulfur dioxide levels drop more than 57% over 15 years
U.S. Environmental Protection Agency (EPA) is announcing the redesignation of the Detroit area to “attainment” for sulfur dioxide emissions after air monitoring shows the region meets the national health-based standard.
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ICYMI: EPA’s New Guidance Removes Requirement for Diesel Exhaust Fluid (DEF) Sensors, Saves American Operators Billions
On Friday, March 27, 2026, President Trump announced U.S. EPA Administrator Lee Zeldin has issued new guidance making it clear DEF sensors are no longer required, and NOx sensors can be used instead to meet regulatory requirements.
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What They Are Saying: Leaders Across America Commend EPA’s Action to Finalize Historic Renewable Fuel Standards and Support America’s Rural Communities
On Friday, March 27, 2026, at the White House Great American Agriculture Celebration on the South Lawn, President Trump announced that U.S. Environmental Protection Agency (EPA) has finalized the historic Renewable Fuel Standard (RFS) “Set 2” final rule.
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Trump Administration Announces Latest Action to Address Diesel Exhaust Fluid (DEF) System Complaints, Saves American Farmers and Truckers Over $13 Billion Annually
EPA Removes DEF Sensor Requirements Saving Americans Billions Annually and Countless Hours of Lost Time and Productivity
EPA Administrator Lee Zeldin has taken to address nationwide concerns from farmers, truckers, motor coach operators, and other diesel equipment operators regarding Diesel Exhaust Fluid (DEF) system failures.
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EPA Finalizes Historic New Renewable Fuel Standards to Strengthen American Energy Security, Support Rural Economies
Rule sets balanced biofuels growth for 2026 and 2027, bolstering domestic oil and feedstock
Today at the White House Great American Agriculture Celebration, President Trump announced that U.S. Environmental Protection Agency (EPA) has finalized the historic Renewable Fuel Standard (RFS) “Set 2” final rule.
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What They are Saying: EPA Fortifies Domestic Fuel Supply, Provides Americans with Relief at the Pump by Approving Nationwide E15 and Removing Boutique Fuel Markets for E10
EPA Administrator Lee Zeldin, in consultation with U.S. Department of Energy (DOE) and in accordance with the Clean Air Act (CAA), issued a temporary emergency fuel waiver to allow nationwide sales of E15 and E10 fuels.
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EPA Fortifies Domestic Fuel Supply, Provides Americans with Relief at the Pump by Approving Nationwide E15 and Removing Boutique Fuel Markets for E10
EPA Administrator Lee Zeldin, in consultation with DOE and in accordance with the Clean Air Act (CAA), issued a temporary emergency fuel waiver to allow nationwide sales of E15 and E10 gasoline ethanol.