Fine Particulate NAAQS Implementation Milestones
Implementation of the 2012 PM2.5 standard develops alongside continued implementation of the 2006 standard.
| Milestone | 2006 PM2.5 NAAQS | 2012 PM2.5 NAAQS |
|---|---|---|
| Standard Effective | October 2006 | December 2012 |
| Designations Effective | December 2009 | April 2015 |
| Infrastructure SIPs Due | October 2009 | December 2015 |
| Attainment Plans (Nonattainment SIPs) Due |
December 2014 (Moderate) |
October 2016 (Moderate areas) |
| Attainment Date | December 2015 (Moderate) December 2019 (Serious) |
December 2021 (Moderate) December 2025 (Serious) |