We've made some changes to EPA.gov. 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.

To contact the EPA for questions about chemical risk assessment and/or this calculator, please Contact Us.

Chemical Risk Assessment Tools

Vapor Intrusion Screening Levels (VISL) Calculator

Select Hazard Quotient

Select Target Risk

Select Exposure Scenario

Predict indoor air concentrations, and risk, from measured media concentrations?

Select Screening Level Type

Groundwater Temperature (° C)

Select RfC Choice

*Chronic selection will retrieve Chronic-only RfDs/RfCs; Subchronic selection will retrieve subchronic values where possible.

Select Individual Chemicals

Select All Chemicals

Select Include Metadata

Top of Page