An official website of the United States government.

Due to a lapse in appropriations, EPA websites will not be regularly updated. In the event of an environmental emergency imminently threatening the safety of human life or where necessary to protect certain property, the EPA website will be updated with appropriate information. Please note that all information on the EPA website may not be up to date, and transactions and inquiries submitted to the EPA website may not be processed or responded to until appropriations are enacted.

We've made some changes to If the information you are looking for is not here, you may be able to find it on the EPA Web Archive or the January 19, 2017 Web Snapshot.

Programs of the Office of the Science Advisor (OSA)

Risk Assessment Current Projects

The Risk Assessment Forum focuses on issues fundamental to risk assessment. As a result, Forum consensus building activities may include definitive risk assessment guidance and risk assessment methodology. Ongoing projects include: 

  • Cumulative Risk Assessment Guidelines: EPA is developing additional guidelines for cumulative risk assessment (CRA) as defined and characterized in the EPA 2003 publication Framework for Cumulative Risk Assessment, an analysis, characterization and possible quantification of the combined risks to health or the environment from multiple agents or stressors. The guidelines will arrange CRA methods into a structure based on EPA's past experience. 
  • Revision of the 1992 Guidelines for Human Exposure Assessment
  • Multiple projects addressing recommendations presented to the agency in reports issued by the National Research Council