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PM-2.5 (1997) Nonattainment Area Summary with History

As of October 01, 2015

Original PM-2.5 (1997) areas were designated effective April 5, 2005.

  NUMBER OF AREAS NUMBER OF COUNTIES 2010 POPULATION
Classification Original
2005
Baseline
Baseline
with
Adjustments*
Today Redesignated Original
2005
Baseline
Baseline
with
Adjustments*
Today Redesignated Original
2005
Baseline
Baseline
with
Adjustments*
Today Redesignated
Serious 0 1 1 0 0 8 8 0 0 3,842,165 3,842,165 0
Moderate 0 18 9 9 0 97 58 39 0 43,818,664 27,898,887 15,919,777
SUBTOTAL 0 19 10 9 0 105 66 39 0 47,660,829 31,741,052 15,919,777
   
Former Subpart 1 39 20 0 20 208 103 0 103 94,116,077 46,455,248 0 46,455,248
SUBTOTAL 39 20 0 20 208 103 0 103 94,116,077 46,455,248 0 46,455,248
   
GRAND 
TOTAL
39 39 10 29 0 208 66 142    0    94,116,077    31,741,052    62,375,025

* Please Note:

Changes can occur that adjust the original baseline counts, e.g., classification changes, area boundary changes, new areas designated nonattainment.
See the report listing these adjustments to original 2005 nonattainment areas.

The 1997 PM-2.5 Philadelphia-Wilmington, PA-NJ-DE nonattainment area, county and population are included in the Moderate classification grouping. 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 .

County subtotals and grand totals may not equal sum of parts. Part counties are only counted one time within groups.



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