Fact Sheet on Evaluating the Vapor Intrusion into Indoor Air
This fact sheet describes the draft guidance that EPA developed to help determine if the vapor intrusion exposure pathway poses a significant risk to human health.
This is not the current EPA website. To navigate to the current EPA website, please go to www.epa.gov. This website is historical material reflecting the EPA website as it existed on January 19, 2025. This website is no longer updated and links to external websites and some internal pages may not work. More information »