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) (12pp, 278k)
• Fact Sheet
• Docket No. EPA-HQ-OAR-2010-0885 contains the proposed rule, final rule, public comments, and supporting documents.

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.

• Proposed Rule (PDF) (6pp, 169k)
• Fact Sheet
• Docket No. EPA-HQ-OAR-2010-0891 contains the proposed rule, final rule, public comments, and supporting documents.

EPA Issues Guidance for Fee Collection Programs - 1997 1-hour Ozone Standard
January 5, 2010 - EPA issued a guidance memorandum to help states develop fee collection programs for the 1-hour standard.

• Guidance Document

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.

• Final Rule (PDF) (35pp, 92k)
• Fact Sheet
• Docket No. EPA-HQ-OAR-2008-0419 contains the proposed rule, final rule, public comments, and supporting documents.