Previous NATA Versions
| NATA year | Release date | HAPs included |
|---|---|---|
| 1996 | May 21, 2002 | 32 |
| 1999 | Feb 22, 2006 | 177 |
| 2002 | Jun 24, 2009 | 181 |
| 2005 | Mar 11, 2011 | 179 |
| 2011 | Dec 17, 2015 | 180 |
“NATA year” refers to the year for which assessment data were collected.
“Release date” is when NATA results were posted to EPA’s website.
“HAPs included” shows how many of the Clean Air Act’s list of 187 hazardous air pollutants (HAPs) were included in each assessment. Each NATA also includes one additional air toxic, diesel particulate matter, which was assessed for noncancer results only.
You can access the 2011 and 2005 NATAs from the links below:
For earlier versions of NATA, search the EPA Archives.