2012 PM National Ambient Air Quality Standards (NAAQS) Nonattainment Actions
Findings of Failure to Submit a Section 110 State Implementation Plan (SIP) for the 2012 Particulate Matter Standard
On March 26, 2018, the U.S. Environmental Protection Agency found that three states failed to meet the deadline for submitting a state implementation plan revision for the annual 2012 Fine Particulate Matter (PM2.5) NAAQS.