date:May 04, 2012
fuel standards, and more locally focused state, tribal air quality programs are already contributing to air quality improvements. These actions will help areas meet the standards and protect public health. In addition, EPA expects that most areas would be able to meet the 2008 standards as a result of recent and pending rules.
The Clean Air Act requires EPA to review and, if necessary, revise air quality standards every five years to ensure that they protect public health with an adequate margi