 |
Code of Federal Regulations (Last Updated: November 8, 2024) |
 |
Title 40 - Protection of Environment |
|
Chapter I - Environmental Protection Agency |
|
SubChapter C - Air Programs |
|
Part 51 - Requirements for Preparation, Adoption, and Submittal of Implementation Plans |
|
Subpart Z - Provisions for Implementation of PM2.5 National Ambient Air Quality Standards |
§ 51.1002 - Classifications and reclassifications.
-
§ 51.1002 Classifications and reclassifications.
(a) Initial classification as Moderate PM2.5 nonattainment area. Any area designated nonattainment for a PM2.5 NAAQS shall be classified at the time of such designation, by operation of law, as a Moderate PM2.5 nonattainment area.
(b) Reclassification as Serious PM2.5 nonattainment area. A Moderate nonattainment area shall be reclassified to Serious under the following circumstances:
(1) The EPA shall reclassify as Serious through notice-and-comment rulemaking any Moderate PM2.5 nonattainment area that the EPA determines cannot practicably attain a particular PM2.5 NAAQS by the applicable Moderate area attainment date.
(2) A Moderate PM2.5 nonattainment area shall be reclassified by operation of law as a Serious nonattainment area if the EPA finds through notice-and-comment rulemaking that the area failed to attain a particular PM2.5 NAAQS by the applicable Moderate area attainment date.