The EPA performed an illustrative analysis of the potential costs, human health benefits, and welfare benefits of nationally attaining a revised primary ozone standard of 70 ppb and a primary alternative ozone standard level of 65 ppb. Because there are not additional costs and benefits of attaining the secondary standard, the EPA did not need to estimate any incremental costs and benefits associated with attaining a revised secondary standard. Per Executive Orders 12866 and 13563 and the guidelines of OMB Circular A-4, this Regulatory Impact Analysis (RIA) presents the analyses of the revised standard level of 70 ppb and an alternative standard level of 65 ppb.

The report was published in September 2015.

• Regulatory Impact Analysis of the Final Revisions to the National Ambient Air Quality Standards for Ground-Level Ozone (PDF)(480 pp, 9 MB)