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Delaware Risk Assessment Calculator (DERAC)

Do you have a previously saved file?
(dated 2022-06-06 or newer)
Previously Saved Files:
File Number:
Do you want to use the same chemicals and chemical info type?
Save feature information click here.
Save Info
  • We only save files for 30 days
  • To save a file for longer, revisit the page and resave your work
  • To get a populated dropdown menu with recently saved files, you must have COOKIES enabled in your browser
  • Remember to always keep a reference of your file number

Select Scenario










*Indoor worker includes industrial tap water

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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

Complete List


Selected






Or Select All



Display Risk/HI Output in Percentage


(Results are in seperate table. See User's Guide.)