Environmental Protection Agency November 2, 2010 – Federal Register Recent Federal Regulation Documents

EPA proposes to determine that the Hayden, Nogales, and Paul Spur/Douglas nonattainment areas in Arizona attained the National Ambient Air Quality Standard (NAAQS) for particulate matter with an aerodynamic diameter of less than or equal to a nominal ten micrometers (PM10) by the applicable attainment date of December 31, 1994. On the basis of this proposed determination, EPA concludes that these three ``moderate'' nonattainment areas are not subject to reclassification by operation of law to ``serious.'' Lastly, on the basis of a review of more recent ambient monitoring data, EPA also is proposing to determine that the Hayden, Nogales and Paul Spur/Douglas nonattainment areas are not currently attaining the PM10 standard.

The Office of Air Quality Planning and Standards (OAQPS) of EPA is announcing the availability of a final document titled Policy Assessment for the Review of the Carbon Monoxide National Ambient Air Quality Standards (PA). The PA contains staff analyses of the scientific bases for alternative policy options for consideration by the Agency prior to rulemaking.