On October 1, 2015, EPA strengthened the National Ambient Air Quality Standards (NAAQS) for ground-level ozone to 70 parts per billion (ppb), based on extensive scientific evidence about ozone’s effects on public health and welfare. The updated standards will improve public health protection, particularly for at-risk groups including children, older adults, people of all ages who have lung diseases such as asthma, and people who are active outdoors, especially outdoor workers. They also will improve the health of trees, plants and ecosystems.

This page contains a variety of fact sheets and other documents that are supplementary to the October 2015 revision for the 2008 Ozone National Ambient Air Quality Standards (NAAQS).

For more information, visit the 2015 Ozone NAAQS page.

• Overview of EPA's Updates to the Air Quality Standards for Ground-Level Ozone (PDF)(9 pp, 658 K, October 1, 2015)
  This fact sheet provides an overview of the 2015 updates to the 2008 National Ambient Air Quality Standards (NAAQS) for Ground-Level Ozone
• EPA's Final Air Quality Standards for Ground-level Ozone: By the Numbers (PDF)(2 pp, 385 K, October 1, 2015)
  This fact sheet provides statistics on our progress reducing pollution and information on the benefits and costs of the updated ozone standards.
• Ozone and Ozone Standards: The Basics (PDF)(2 pp, 360 K)
  This fact sheet provides basic information about ozone pollution and ozone standards
• Ozone and Health (PDF)(3 pp, 331 K)
  This fact sheet provides an overview of the what scientific studies show about health effects from ozone exposure, including who is most at risk.
• Ozone and Children’s Health (PDF)(4 pp, 251 K)
  This fact sheet provides information on how EPA’s updated ozone standards will help children, who are at risk from ozone exposure.
• Designations and Permitting Requirements for the 2015 Ozone Standards (PDF)(4 pp, 363 K, October 1, 2015)
  This fact sheet provides an overview to the process of designations and permits for the revised NAAQS standard
• Tools for Addressing Background Ozone (PDF)(5 pp, 468 K, October 1, 2015)
  This fact sheet provides information on the Agency's plan on addressing background ozone as it related to the new standards
• Updates to the Air Quality Index (AQI) for Ozone and Ozone Monitoring Requirements (PDF)(6 pp, 176 K, October 1, 2015)
  This fact sheet provides an overview of the new updates to the AQI, based on the strengthened 2015 ozone standard
• Working to Reduce Ozone in California (PDF)(2 pp, 396 K)
  This fact sheet outlines the challenges of addressing ozone pollution in some areas of California, along with the work the state and federal government is doing to help address sources of ozone-forming pollution.
• EPA's Ozone Air Quality Standards and Agriculture (PDF)(4 pp, 512 K, October 1, 2015)
  This fact sheet provides an overview of what the ozone standards mean for the agriculture industry
• The Advance Program (PDF)(2 pp, 354 K)
  This fact sheet describes the Advance Program, a collaborative effort by EPA, states, tribes and local governments to encourage emission reductions to help attainment areas continue to meet standards for ozone and fine particle pollution.
• Final Updates to National Ambient Air Quality Standards for Ozone: Webinar Presentation Slides (PDF)(33 pp, 852 K, October 21, 2015)
  This presentation provides an overview of the updated ozone standards, the updated Air Quality Index, ozone monitoring updates, and implementation of the new standards.