On Dec. 17, 2014, EPA published in the Federal Register its proposed revision to the National Ambient Air Quality Standards (NAAQS) for ozone

The EPA is proposing to revise the primary ozone standard to a level within the range of 0.065 to 0.070 parts per million (ppm), and to revise the secondary standard to within the range of 0.065 to 0.070 ppm.

Written comments on this proposed rule must be received by March 17, 2015. Submit your comments, identified by Docket ID No. EPA–HQ– OAR–2008–0699, to the EPA by one of the following methods:

  • Federal eRulemaking Portal: http://www.regulations.gov . Follow the online instructions for submitting comments.
  • Email: A-and-R-Docket@epa.gov. Include docket ID No. EPA–HQ–OAR–2008–0699 in the subject line of the message.
  • Fax: (202) 566–9744.
  • Mail: Environmental Protection Agency, EPA Docket Center (EPA/DC), Mailcode 28221T, Attention Docket ID No. OAR–2008–0699, 1200 Pennsylvania Ave. NW., Washington, DC 20460. Please include a total of two copies.

The EPA intends to hold three public hearings on this proposed rule in January 2015. These will be announced in a separate Federal Register notice that provides details, including specific dates, times, addresses, and contact information for these hearings.

EPA expects to finalize the ozone rule in October, 2015. Once finalized, states will have up to one year to recommend the attainment status of each county.  Final designations will be made the following year.

For more information on the proposed ozone revision, see this previous ozone blog post.