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Maintenance Lead Areas
As of December 14, 2012Current 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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