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EPA Publishes Final Ozone NAAQS: 70 ppb

On 10/01/2015, EPA signed a final rule lowering the ozone NAAQS to 70 ppb (from the current standard of 75 ppb).

Anticipated schedule:

  • October 1, 2016:  States recommend nonattainment designations.
  • June 1, 2017:  EPA response to states’ recommendations.
  • October 1, 2017:  EPA issues final nonattainment designations.
  • 2020-2021:  States must submit SIPs.
  • 2020-2037:  Attainment due dates (vary by severity).

EPA is including grandfathering provisions for certain PSD permit applications that are still in process.  EPA will also be issuing several supplemental rules for implementation of the standard.

For more information, contact your EPS consultant.