Risk Assessment

What is risk?
EPA considers risk to be the chance of harmful effects to human health or to ecological systems resulting from exposure to an environmental stressor. See what is risk for more information.
What is a human health risk assessment?
An estimation of the nature and probability of adverse health effects in humans who may be exposed to chemicals in contaminated environments. See human health risk assessment for more information.
What is an ecological risk assessment?
An evaluating of the likelihood that the environment may be impacted as a result of exposure to one or more environmental stressors such as chemicals, land change, disease, invasive species and climate change. See ecological risk assessment for more information.

EPA uses risk assessment to characterize the nature and magnitude of health risks to humans and ecological receptors from chemical contaminants and other stressors that may be present in the environment.

Risk Assessment

Resources for Environmental Professionals

Recent Announcements

Draft Human Health and Ecological Risk Assessments for Final Tetrachlorvinphos Occupational and Residential Exposure Risk Assessment (Deadline for Comments is 7/24/17).
Draft Human Health and Ecological Risk Assessments for the pesticide registration of chlorethoxyfos, diazinon and phosmet. (Deadline for Comments is 7/24/17).
Receipt of Information Under the Toxic Substances Control Act (TSCA) for the Chemical Octamethylcyclotetrasiloxane (D4) (CASRN 556-67-2)

These announcements are posted in the Federal Register. Also available, are additional recent announcements on risk assessment.

Risk Assessment

What is risk?

What is a human health risk assessment?

What is an ecological risk assessment?

Risk Assessment

Resources for Environmental Professionals

Recent Announcements

Calendar of Risk Assessment Activities