PM-2.5 Nonattainment Area Summary
(1997 Standard)
As of July 31, 2009
| Number of | Number of | Population | |||
|---|---|---|---|---|---|
| Areas | Counties | ||||
| 39 | 208 | 88,394,361 | |||
![[logo] US EPA](http://www.epa.gov/epafiles/images/logo_epaseal.gif){kind=logo}
Green Book
- You are here: EPA Home
- Green Book
- Particulate Matter (PM-2.5)
- PM-2.5 Nonattainment Area Summary (1997 Standard)