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Maintenance Lead 1978 Standard Areas

As of December 05, 2013
Current and historical design value data can be found at http://www.epa.gov/airtrends/values.html
Areas Listed Alphabetically Design Values
at Designation
No.
Counties
NAA
2010
Population
EPA
Region
State
(ug/m3)
Collin Co, TX 1 782,353    6 TX
Dakota Co, MN 1 318,833    5 MN
Douglas Co, NE 1 1,242    7 NE
Fayette Co, TN 1 38,033    4 TN
Iron County (part); Dent Township, MO 1 1,194    7 MO
Iron County (part); Liberty and Arcadia, MO 1 6,066    7 MO
Jefferson Co, AL 1 658,472    4 AL
Marion Co, IN 1 18,158    5 IN
Muscogee Co, GA 1 189,886    4 GA
Shelby Co, TN 1 2,226    4 TN
Williamson Co, TN 1 183,182    4 TN
 
11 Total Areas 10 2,199,645     

The county total is adjusted to count a single county only once (in the case where part of a county may be in multiple maintenance areas). Any multi-state areas are counted in the nonattainment report until all state areas have been redesignated.


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