On May 21 EPA published two final rules related to the 2008 ozone NAAQS in the Federal Register.
The first of the two rules:
- establishes the method for classifying ozone areas for the 2008 ozone NAAQS;
- establishes the attainment dates for areas in each classification;
- bumps up several areas in California to higher classifications; and
- revokes the 1997 ozone NAAQS for transportation conformity purposes.
Link to first rule (PDF)
Also, published today was the final rule that designates nonattainment areas for the 2008 ozone NAAQS.
Link to second rule (PDF)
Both final rules are effective on July 20, 2012. The one-year conformity grace period starts on the effective of the designations.