The Risk Assessment Information System

RAIS Chemical PRG Calculator

Do you have a previously saved file?
(dated 2024-06-22 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




Select Media




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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