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Particulate Matter (PM) Pollution

Fine Particulate NAAQS Implementation Milestones

Implementation of the 2012 PM2.5 standard develops alongside continued implementation of the 2006 standard.

PM2.5 NAAQS Implementation Milestones
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)
December 2017 (Serious)

October 2016 (Moderate areas)
Attainment Date December 2015 (Moderate)
December 2019 (Serious)
December 2021 (Moderate)
December 2025 (Serious)