Ground-level Ozone
Regulatory Actions
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Other Regulatory Actions
related to
Ground-level Ozone
This page contains a listing of all regulatory actions related to ground-level ozone.
Ozone Standards
EPA releases documents on the National Ambient Air Quality Standard for ozone
In the interests of transparency, the Administration has released the EPA’s recommendation on the National Ambient Air Quality Standard for ozone. You can find that recommendation in the documents on this page. The Agency will implement the standards set during the previous Administration while we continue the on-going 5-year review of the updated science, which is scheduled to be completed in 2013.
- Draft Regulatory Impact Analysis Final National Ambient Air Quality Standard for Ozone (PDF) (87pp, 3.24mb)
- Draft National Ambient Air Quality Standards Preamble for Ozone (PDF) (381pp, 1.05mb)
Statement by EPA Administrator Lisa P. Jackson on the Ozone National Ambient Air Quality Standards
September 2, 2011 - Since day one, under President Obama's leadership, EPA has worked to ensure health protections for the American people, and has made tremendous progress to ensure that Clean Air Act standards protect all Americans by reducing our exposures to harmful air pollution like mercury, arsenic and carbon dioxide. This Administration has put in place some of the most important standards and safeguards for clean air in U.S. history: the most significant reduction of sulfur dioxide and nitrogen oxide air pollution across state borders; a long-overdue proposal to finally cut mercury pollution from power plants; and the first-ever carbon pollution standards for cars and trucks. We will revisit the ozone standard, in compliance with the Clean Air Act.
- Letter from Cass Sunstein, Administrator, Office of Information and Regulatory Affairs (PDF) (2pp, 125k)
- Statement by the President on the Ozone National Ambient Air Quality Standards
EPA Updates Status of the Ozone Reconsideration
July 26, 2011 - Administrator Jackson is fully committed to finalizing EPA's reconsideration of the Clean Air Act health standard for ground level ozone. That reconsideration is currently going through interagency review led by OMB. Following completion of this final step, EPA will finalize its reconsideration, but will not issue the final rule on July 29th, the date the agency had intended. We look forward to finalizing this standard shortly. A new ozone standard will be based on the best science and meet the obligation established under the Clean Air Act to protect the health of the American people. In implementing this new standard, EPA will use the long-standing flexibility in the Clean Air Act to consider costs, jobs and the economy.
EPA Administrator Requests More Input from Agency's Science Advisors
December 8, 2010 - In January 2010 EPA proposed stricter standards for smog. As part of EPA's extensive review of the science, Administrator Jackson will ask the Clean Air Scientific Advisory Committee (CASAC) for further interpretation of the epidemiological and clinical studies they used to make their recommendation. To ensure EPA's decision is grounded in the best science, EPA will review the input CASAC provides before the new standard is selected. Given this ongoing scientific review, EPA intends to set a final standard in the range recommended by the CASAC by the end of July, 2011.
- Motion filed with Court (PDF) (22pp, 54k)
- Declaration (PDF) (3pp, 902k )
Proposed Revisions to National Standards for Ground-Level Ozone
January 6, 2010 – The Environmental Protection Agency has proposed to strengthen the national ambient air quality standards for ground-level ozone. Ground-level ozone is a primary component of smog. The proposed revisions are based on scientific evidence about ozone and its effects on people and sensitive trees and plants. EPA will accept comments for 60 days following publication of the proposal in the Federal Register.
- Proposed Rule (PDF) (115pp, 713k) - Federal Register - Jan 19, 2010
- Fact Sheet - Revisions to Ozone Standards (PDF) (6pp, 39k )
- Instructions on submitting comments
- Presentation
- Text slides (PDF) (17pp, 406k)
- Maps (PDF) (5pp, 1.2 MB)
- Public Hearings -
EPA will hold three public hearings on the proposal in Arlington, Virginia and Houston, Texas on February 2, 2010 and in Sacramento, California on February 4, 2010.
- Announcement of Public Hearings (PDF) (2pp, 50k) - Federal Register - Jan 12, 2010
- Houston list of speakers (PDF) (3pp, 50k)
- Audio - Houston Morning Session 1 (mp3) (1 hour, 13.8 MB)
- Audio - Houston Morning Session 2 (mp3) (2 hours, 28.6 MB)
- Audio - Houston Evening Session 1 (mp3) (1.3 hours, 18.4 MB)
- Audio - Houston Evening Session 2 (mp3) (2 hours, 25.4 MB) - note: due to technical difficulties, this session was recorded at lower quality
- Audio - Houston Final Session (mp3) (1 hour, 13.3 MB)
- Arlington list of speakers (PDF) (2pp, 34k)
- Sacramento list of speakers (PDF) (2pp, 36k)
- Supplement to the March 2008 Regulatory Impact Analysis
(RIA)
- Fact Sheet - Supplement to the RIA (PDF) (2pp, 23k)
- Full Document (PDF) (89pp, 1,492k)
- Summary of the updated RIA (PDF) (12pp, 162k)
- Alternative Standards 0.055 and 0.060 ppm (PDF) (26pp, 481k)
- Re-analysis of the Benefits of Attaining Alternative Ozone Standards to Incorporate Current Methods (PDF) (21pp, 341k)
- Secondary Ozone NAAQS Evaluation (PDF) (20pp, 550k)
- Appendix: Examples of cost of attaining standard alternatives for selected nonattainment areas (PDF) (10pp, 295k)
- Additional Documents
- Counties Violating Primary Ground-level Ozone Standard, 2006-2008 (PDF) (14pp, 32k)
- Counties Violating Secondary Seasonal Ground-level Ozone Standard, 2006-2008 (PDF) (13pp, 29k)
- Counties Projected to Violate Primary 8-hour Ground-level Ozone Standard in 2020 (PDF) (14pp, 29k)
- Counties Projected to Violate Secondary Seasonal Ground-level Ozone Standard in 2020 (PDF) (15pp, 27k)
- EPA 2006 Criteria Document (completed for 2008 ozone standards review)
- EPA 2007 Staff Paper (completed for 2008 ozone standards review)
- EPA 2008 Regulatory Impact Analysis (PDF) (558pp, 12.6 MB) (completed for 2008 ozone standards review)
EPA to Reconsider National Standards for Ground-Level Ozone
September 16, 2009 - The Environmental Protection Agency announced it would reconsider its 2008 decision setting national standards for ground-level ozone. EPA is reconsidering the standards to ensure they are clearly grounded in science, protect public health with an adequate margin of safety, and are sufficient to protect the environment.
- Fact Sheet (PDF) (2pp, 14k)
Revisions to Ozone Monitoring Network Design Requirements
July 8, 2009 The Environmental Protection Agency has proposed revisions to ground-level ozone air quality monitoring network design requirements. The proposed revisions would support changes to the primary and secondary national air quality standards for ozone that EPA issued in March 2008.
- Fact Sheet (PDF) (3pp, 25k)
- Proposed Rule (PDF) (15pp, 123k) - Federal Register - July 16, 2009
Strengthened National Standards for Ground-Level Ozone
March 12, 2008 - The Environmental Protection Agency significantly strengthened its national ambient air quality standards (NAAQS) for ground-level ozone, the primary component of smog. These changes will improve both public health protection and the protection of sensitive trees and plants.
- Final Rule (PDF) (79pp, 578k) - Federal Register - March 27, 2008
- Fact Sheet (updated 3/18/08) (PDF) (6pp, 49k)
- Regulatory Impact Analysis (RIA) (PDF) (558pp, 12.6 MB)
- Changes to the Air Quality Index (PDF) (2pp, 25k)
- Presentation: Revise National Ambient Air Quality Standards for Ground-level Ozone
- Text Slides (3/18/08) (PDF) (17pp, 385k)
- Maps and Graphics (3/12/08)
- Counties with Monitors Violating the 1997 8-Hour Ozone Standard of 0.08 parts per million (based on 2004-2006 Air Quality Data) (PDF) (1pg, 189k)
- Counties with Monitors Violating the Revised 8-Hour Ozone Standard of 0.075 parts per million (based on 2004-2006 Air Quality Data) (PDF) (1pg, 222k)
- Counties with Monitors Projected to Violate the 2008 8-Hour Ozone Standard of 0.075 parts per million in 2020 (based on air quality model projections) (PDF) (1pg, 169k)
- Additional Documents
EPA Extends Deadline for Faxed Comments on the Proposed Ozone Standards
The public comment period for EPA's proposed rule addressing the ozone standards closed on October 9, 2007. However the Agency will accept comments by fax only through Monday October 15, 2007. Please use the following number to submit comments by fax: 202-566-9744.
- EPA Extends Deadline for Faxed Comments on the Proposed Ozone Standards (PDF) (2pp, 168k) - Federal Register - October 12, 2007
Ozone Proposal Fax Number Change
October 5, 2007 - For those wishing to submit comments by fax on EPA's proposed rule addressing the ozone standards, the fax number listed in the June 21, 2007 Federal Register notice announcing the Agency's proposed rule is incorrect. Please use the following number to submit comments by fax: 202-566-9744.
Current Speaker Lists for September 5, 2007 Hearings Available
August 31, 2007 - EPA will hold hearings on the recently proposed ozone standards on Wednesday, September 5, 2007. Click on the location below to view the list of speakers, current as on August 31, 2007.
- Atlanta (PDF) (3pp, 55k)
- Chicago (PDF) (3pp, 55k)
- Houston (PDF) (3pp, 58k)
Current Speaker Lists for August 30, 2007 Hearings Available
August 27, 2007 - EPA will hold the first hearings on the recently proposed ozone standards on Thursday, August 30, 2007. Click on the location below to view the list of speakers, current as on August 27, 2007.
- Los Angeles (PDF) (5pp, 54k)
- Philadelphia (PDF) (5pp, 54k)
EPA Announces Availability of Regulatory Impact Analysis for Proposed Ozone Standards
August 2, 2007 - EPA completes benefits and costs analysis on the proposal to strengthen the National Ambient Air Quality Standards for ground-level ozone.
EPA Announces Five Public Hearings for Proposed Ground-level Ozone Standards
July 27, 2007 - EPA will hold public hearings in Los Angeles, California and Philadelphia, Pennsylvania on August 30, 2007. The next week on September 5, 2007, EPA will hold public hearings in Atlanta, Georgia; Chicago, Illinois; and Houston, Texas.
- Hearing Notice (PDF) (2pp, 172k) - Federal Register - July 11, 2007
Proposed Revisions to Ozone National Standards
June 20, 2007 - The Environmental Protection Agency has proposed revisions to the National Ambient Air Quality Standards for ground-level ozone. The proposed revisions would strengthen the ground-level ozone standards that are associated with public health concerns. EPA will accept comments for 90 days after the publication of the proposal in the Federal Register.
- Proposed Rule (PDF) (102pp, 822k) Federal Register - July 11, 2007
- Fact Sheet (PDF) (5pp, 41k)
- Regulatory Impact Analysis (PDF) (364pp, 4.1 MB)
- Presentation: Proposal to Revise National Ambient Air Quality Standards for Ground-level Ozone
- Text Slides (6/27/07) (PDF) (16pp, 411k)
- Maps (6/21/07 11 AM EST) (PDF) (6pp, 509k)
- Additional Documents
Ozone Designations and Classifications
Learn more about ozone designations and classifications:
Ozone Implementation
Guidance on Removing Stage II Gasoline Vapor Control Programs from State Implementation Plans and Assessing Comparable Measures
August 7, 2012 - EPA issued guidance for removing stage II gasoline vapor control programs from state implementation plans and assessing comparable measures.
- Transmittal Memo (PDF) (1pg, 73k)
- Guidance (PDF) (41pp, 615k)
Final Rule Waives Requirements for Gas Pump Vapor Recovery
May 9, 2012 - EPA has determined that the systems used at gas station pumps to capture harmful gasoline vapors while refueling cars can be phased out. Modern vehicles are equipped to capture those emissions. Beginning later this year, states may begin the process of phasing out vapor recovery systems at the pump.
- Final Rule (PDF) (36pp, 292k)
- Fact Sheet (PDF) (3pp, 105k)
Final Approach for Establishing Nonattainment Area Classifications and Attainment Deadlines
April 30, 2012 - Final rule directs key aspects of the implementation of the 2008 National Ambient Air Quality Standards (NAAQS) for ground-level ozone.
- Final Classifications Rule (PDF) (38pp, 214k)
- Fact Sheet Summarizing Final Classifications Rule (PDF) (2pp, 24k)
Implementing the 1997 8-hour Ozone National Ambient Air Quality Standards
April 27, 2012 - This final action revises the 2004 rule that specified the first phase of requirements that state, tribal and local air pollution control agencies would follow to meet the 1997 8-hour Ozone National Ambient Air Quality Standards. As a result of this action, the Clean Air Act classifications for 16 areas of the U.S. will be revised.
- Final Rule (PDF) (109pp, 597k)
- Fact Sheet (PDF) (4pp, 103k)
Implementing the 2008 National Ambient Air Quality Standards for Ozone: Proposed Nonattainment Area Classifications Approach and Attainment Deadlines
February 7, 2012 - This action proposes a range of ozone levels for each ozone nonattainment area classification as well as the date by which these areas would be required to meet the standards.
- Proposed Rule (PDF) (13pp, 197k) - Federal Register - February 14, 2012
- Fact Sheet (PDF) (4pp, 34k)
EPA proposes criteria for waiving federal requirements for vapor recovery systems at gas stations in areas with high ground-level ozone.
July 8, 2011 EPA is proposing criteria for determining that there is widespread use of onboard refueling vapor recovery (ORVR) for capturing gasoline vapor emissions when gasoline-powered vehicles are refueled.
- Fact Sheet (PDF) (2pp, 75k)
- Proposed Rule (PDF) (9pp, 217k) - Federal Register - July 15, 2011
EPA proposes revisions to the reasonable further progress requirements for the 1997 8-hour ozone national ambient air quality standard.
December 15, 2010 - EPA is proposing to revise an earlier interpretation of its rule regarding requirements for Reasonable Further Progress (RFP) State Implementation Plans, and is also seeking comment on retaining the existing RFP approach.
- Fact Sheet (PDF) (2pp, 27k)
- Proposed Rule (PDF) (6pp, 169k) - Federal Register - December 22, 2010
EPA Issues Guidance for Fee Collection Programs - 1979 1-hour Ozone Standard
January 5, 2010 - EPA issued a guidance memorandum to help states develop fee collection programs for the 1-hour ozone standard.
- Guidance Memorandum (PDF) (17pp, 833k)
EPA Makes Findings of Failure to Submit State Implementation Plans (SIPs) -- 1979 1-hour Ozone Standard
January 5, 2010 - EPA issued a finding that California missed a Clean Air Act deadline for submitting an element of its State Implementation Plan for implementing EPAs national air quality standards for ozone.
- Fact Sheet
- Notice (PDF) (4pp, 144k) - Federal Register - January 5, 2010
EPA Completes Revisions to 1997 8-Hour Ozone Implementation Phase 2 Rule to Address Vacatur and Remand of Reasonable Further Progress Credits
August 5, 2009 - This final rule will allow states to take credit for reductions of Volatile Organic Compound and nitrogen oxides emissions outside of a nonattainment area if the state can demonstrate that those reductions would help the nonattainment area meet its reasonable further progress goals.
- Fact Sheet
- Final Rule (PDF) (35pp, 92k)
EPA Sets Schedule for Flagging Exceptional Ozone Air Quality Monitoring Data
May 13, 2009 - EPA established schedule for states to submit exceptional events claims that may affect the status of an area under the 2008 ozone standards.
- Fact Sheet
- Final Rule (PDF) (30pp, 52k)
EPA proposes to disapprove seven ozone attainment demonstrations and makes one finding of failure to submit ozone attainment demonstrations. -- 1997 Ozone Standard
April 29, 2009 - EPA proposed disapprovals for the ozone attainment demonstration element of the State Implementation Plans (SIPs) for five states and is also making a finding that two states missed the June 15, 2007 Clean Air Act deadline for submitting ozone attainment demonstrations.
- Fact Sheet
- Federal Register Notices
- May 8, 2009
- Disapproval of Air Quality Implementation Plans; Connecticut; Attainment Demonstration for the Connecticut Portion of the New York-N. New Jersey-Long Island, NY-NJ-CT 8-Hour Ozone Nonattainment Area | PDF Version (11pp, 98K)
- Approval and Promulgation of Implementation Plans; New Jersey Ozone Attainment Demonstration | PDF Version (11pp, 98K)
- Approval and Promulgation of Air Quality Implementation Plans; Pennsylvania; Attainment Demonstration for the Philadelphia-Wilmington- Atlantic City Moderate 8-Hour Ozone Nonattainment Area | PDF Version (7pp, 77K)
- Approval and Promulgation of Air Quality Implementation Plans; Maryland; Attainment Demonstration for the Philadelphia-Wilmington- Atlantic City Moderate 8-Hour Ozone Nonattainment Area | PDF Version (7pp, 121K)
- Approval and Promulgation of Air Quality Implementation Plans; Delaware; Attainment Demonstration for the Philadelphia-Wilmington- Atlantic City Moderate 8-Hour Ozone Nonattainment Area | PDF Version (6pp, 113K)
- Approval and Promulgation of Air Quality Implementation Plans; Maryland; Attainment Demonstration for the Baltimore 8-Hour Ozone Moderate Nonattainment Area | PDF Version (6pp, 111K)
- Finding of Failure To Submit State Implementation Plans Required for the 1997 8-Hour Ozone National Ambient Air Quality Standard; North Carolina and South Carolina | PDF Version (5pp, 93K)
EPA proposes rule to implement the subpart 1 area reclassification and provisions under former 1997 1-hour ozone standard.
January 9, 2009 - EPA proposes a response to the DC Circuit Courts vacatur of an April 2004 rule known as the Phase 1 Ozone Implementation Rule.
- Fact Sheet (PDF) (4pp, 36k)
- Proposed Rule (PDF) (35pp, 149k)
EPA Proposes to Revise 1997 8-Hour Ozone Implementation Phase 2 Rule to Address Vacatur and Remand of Reasonable Further Progress Credits
July 14, 2008 EPA proposes to revise a provision of the Phase 2 Ozone Implementation Rule for the 1997 ozone air quality standard. The provision allows 8-hour ozone nonattainment areas to take credit for emissions reductions outside the nonattainment area for purposes of the Reasonable Further Progress (RFP) requirement.
- Fact Sheet
- Proposed Rule (PDF) (23pp, 91k)
EPA Makes Findings of Failure to Submit State Implementation Plans (SIPs) -- 1997 Ozone Standard
March 17, 2008 - EPA issued findings that 11 states missed Clean Air Act deadlines for submitting plans, or elements of plans, for implementing EPA’s national air quality standards for ozone.
- Fact Sheet
- SIP Requirement Timeline (PDF) (1pg, 11k)
- Federal Register Notice (PDF) (6pp, 131k) Federal Register - March 24, 2008
Findings on Meeting Basic Program Requirements for State Implementation Plans -- 1997 Ozone Standard
March 17, 2008 - EPA signed a Federal Register notice making "completeness" findings for all states and territories. These findings pertain to the "infrastructure" requirements that all states must have in their regulatory plans to attain, maintain, and enforce the 1997 National Ambient Air Quality Standards for ground-level ozone.
- Fact Sheet
- Federal Register Notice (PDF) (7pp, 129k) Federal Register - March 27, 2008
Final Notice of Reconsideration - Aspects of Phase 2 Implementation Rule
May 31, 2007 - EPA completed reconsideration on several issues associated the ozone implementation rule requirements and their interaction with the Clean Air Interstate Rule and the New Source Review permitting program.
- Notice of Reconsideration (PDF) (90pp, 267k)
- Fact Sheet (PDF) (3pp, 25k)
Proposed Notice of Reconsideration - Aspects of Phase 2 Implementation Rule
December 11, 2006 - EPA is requesting public comment on several issues associated the ozone implementation rule requirements and their interaction with the Clean Air Interstate Rule and the New Source Review permitting program.
- Notice of Reconsideration (PDF) (55pp, 140k)
- Fact Sheet (PDF) (2pp, 22k)
Proposed Notice of Reconsideration - Overwhelming Transport Classification
EPA is requesting public comment on several issues associated with the overwhelming
transport classification available to certain areas designated “nonattainment” because
they do not meet EPA’s 8-hour ozone national ambient air quality
standard.
- Notice of Reconsideration (PDF) (46pp, 167k)
- Fact Sheet (PDF) (4pp, 126k)
EPA’s Final Implementation Rule - Phase 2
November 9, 2005 - EPA issued a final rule that will take the next steps to
protect the American public from ground-level ozone pollution. This rule,
often called the Phase 2 Ozone Rule, outlines the remaining elements of the
program to implement the 8-hour ground-level ozone National Ambient Air Quality
Standard that EPA established in July 1997. State, tribal and local government
will rely upon these requirements as they develop their plans showing how
they will attain or maintain the 8-hour ozone standard.
- Final rule (PDF) (95pp, 561k) Federal Register - November 29, 2005
- Fact sheet
Ozone Clean Air Progress Will Continue
July 26, 2005 - EPA identified the boundaries, designations, and classifications
for areas under the 1-hour ozone standard that were in place as of June
15, 2004.
- Final rule (PDF) (9pp, 84k) Federal Register - August 3, 2005
- Fact sheet
EPA's Final Implementation Rule-Phase I
On June 15, 2004, EPA issued the final rule to implement the 8-hour Ozone
National Ambient Air Quality Standard-Phase I. The phase I final rule
sets forth the classification scheme for nonattainment areas and requires
States' continued obligations with respect to existing 1-hour ozone requirements.
- Final implementation rule (PDF) (50pp, 234k) Federal Register - April 30, 2004
NOx SIP Call
In October, 1998, EPA finalized the "Finding of Significant Contribution
and Rulemaking for Certain States in the Ozone Transport Assessment Group
Region for Purposes of Reducing Regional Transport of Ozone." (Commonly
called the NOx SIP Call.)
- Notice of Proposed Rulemaking
- Supplemental Notice of Proposed Rulemaking
- Final Rule
- Related Documents and Data
- NOx Budget Trading Program, 2005 Program Compliance and Environmental Results (PDF) (40pp, 5.63 MB)
Learn more about ozone implementation
Early Action Compacts
Learn more about early action compacts