The Risk Assessment Information System

RAIS Chemical PRG Calculator

Do you have a previously saved file?
(dated 2024-09-04 or newer)
File Number:
Do you want to use the same chemicals and chemical info type?

Using the Chemical PRG Calculator

Target Risk






Target Hazard Quotient





Select Scenario









*Indoor worker includes industrial tap water

Select Media







Select Media






Select Media




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Select Media




Select Media





Select Media




Select Media






Select PRG type




Select Chemicals Data Source




Select RfD/RfC Type



*Chronic selection will retrieve Chronic-only RfDs/RfCs; Subchronic selection will first retrieve subchronic values where possible and then use chronic values.

Select Chemicals of Interest



Or Select by Category














Or Select All



Select Metadata


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