TAILIEUCHUNG - Summary of the updated Regulatory Impact Analysis (RIA) for the Reconsideration of the  2008 Ozone National Ambient Air Quality Standard (NAAQS) 

Most analyses of the relationship between health and the economy focus on average health, but health is actually very unevenly distributed across society. In all countries with available data, significant differences in health exist between socioeconomic groups, in the sense that people with lower levels of education, occupation and/or income tend to have systematically higher morbidity and mortality rates. These health inequalities are one of the main challenges for public health, and there is a great potential for improving average population health by eliminating or reducing the health disadvantage of lower socioeconomic groups. This requires an active engagement of many. | Summary of the updated Regulatory Impact Analysis RIA for the Reconsideration of the 2008 Ozone National Ambient Air Quality Standard NAAQS On September 16 2009 EPA committed to reconsidering the ozone NAAQS standard promulgated in March 2008. The ozone NAAQS will be selected from the proposed range of to ppm based on this reconsideration of the evidence available at the time the last standard was set. Today s proposed rule also includes a separate secondary NAAQS for which this RIA provides only qualitative analysis due to the limited nature of available EPA guidance for attaining this standard This supplement to the RIA contains an updated illustrative analysis of the potential costs and human health and welfare benefits of nationally attaining a new primary ozone standard. The basis for this updated economic analysis is the RIA published in March 2008 with a few significant changes. These changes reflect the more stringent range of options being proposed by the Administrator. It also reflects some significant methodological improvements to air pollution benefits estimation which EPA has adopted since the ozone standard was last promulgated. These significant changes include the following In March 2008 the Administrator lowered the primary ozone NAAQS from ppm to ppm. The RIA which accompanied that rule analyzed a less stringent alternative standard of ppm and two more stringent standards of and ppm. This RIA supplement presents an analysis of three alternative standards within the proposed range and ppm. Because today s proposed rule is a reconsideration each alternative standard is compared against the prior standard of ppm. Per Executive Order 12866 and the guidelines of OMB Circular A-4 this Regulatory Impact Analysis RIA also presents analyses of two alternative standards ppm and ppm. It is important to note that as the stringency of the standards increases we believe that the .

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