You are here: EPA Home > Green Book > PM-2.5 (2006) Maintenance Areas (Redesignated from Nonattainment)
PM-2.5 (2006) Maintenance Areas (Redesignated from Nonattainment)Data is current as of March 31, 2023
The PM-2.5 (2006) Philadelphia-Wilmington, PA-NJ-DE nonattainment area is included in both the Moderate and Subpart 1 list. NJ was classified as Subpart 1 at redesignation (effective September 4, 2013, 78 FR 54396), while PA and DE were classified as Moderate at redesignation. DE was redesignated effective September 4, 2014 79 FR 45350, and PA was redesignated effective April 21, 2015 80 FR 22112 .