Results: Modeled Ambient Concentration: Charts

Note: EPA no longer updates this information, but it may be useful as a reference or resource.

Statewide Estimates:
Displays a horizontal bar for each State that represents the central part of the distribution of the ambient concentrations in that State (the 25th to 75th percentile) as well as the median value for the selected pollutant.

Percent Contribution:
Contains horizontal bars representing the percent contribution of four source types (major, area and other, onroad mobile, and nonroad mobile) as well as the contribution of the estimated background to the statewide average concentration of the selected pollutant. Select a chart type (Statewide Estimates or Percent Contribution) and a pollutant below.

View a Chart in Adobe Acrobat PDF Format
Select below a chart type (Statewide Estimates or Percent Contribution) from the first list and a pollutant from the second list.
1. Select Chart Type	2. Select a Pollutant

Results: Modeled Ambient Concentration: Charts

Local Navigation