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Estimated Risk

Summary of Results
Background on Risk Characterization
What about Diesel PM?
Health Effects Criteria
Maps
Bar Charts
Spreadsheets
Summary of Results
This link provides an overview of the results of the risk characterization.
Background on Risk Characterization
This link provides general background on risk characterization in a question and answer format.
What about Diesel PM?
This link provides information about the potential risk from diesel exhaust emissions.
Health Effects Criteria
This link provides cancer and non-cancer information which is associated with each toxic air pollutant as well as a reference to the source of that information. EPA used these quantitative health effects criteria to develop the cancer and non-cancer risk levels shown on the bar charts and maps.
Risk Maps
This link allows you to select a map showing estimated cumulative cancer or non-cancer risk by county (U.S. maps or State map) due to inhalation of toxic air pollutants. You can also view the cancer or non-cancer risk for individual pollutants.



Air Toxics Risk Characterization Bar Charts
This links to groupings of bar charts (28 total) that depict summary information related to the risk characterization. Note that you need Adobe Acrobat 4.0 to be able to print these bar charts. You can obtain this version free of charge at http://www.adobe.com/products/acrobat/readstep2.html.


Results of the Risk Assessment at the Census-Tract/County/State Level
This link provides Excel spreadsheets (zipped files) of the individual pollutant results at the census-tract, as well as county/state level. These data are provided for those who wish to do their own technical analyses and comparisons using the most refined output available from this national-scale assessment. In performing such analyses, it is extremely important that users be mindful of the purposes for which the national-scale assessment was developed. In our judgment, it would be inappropriate to use these results alone to draw conclusions about local concentrations and risk. The results are most meaningful when viewed at the State or national level. There are important limitations that affect how the data should be used and interpreted. These limitations are related to gaps in emissions data, limitations in the computer models used, default assumptions in the risk assessment and limitations in the overall design of the assessment (intended to address some questions but not others). Please see the limitations section of this website for more details.

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