Integrated Risk Information System

IRIS Assessments

Final Assessments:

• Formaldehyde (Final Report)
• Chromium (VI) (Final Report)
• PFDA (Final Report)

Assessments in Development:

• PFNA (Public Comment Draft)
• Uranium (Protocol) 
• Nitrate/Nitrite (Protocol) 
• Inorganic Arsenic (Public Comment Draft) 

See the Full List of Assessments in Development

IRIS External Peer Review Reports

IRIS Assessment Peer Review Reports:

• IRIS Toxicological Review of Formaldehyde (External Review Draft, 2022)
• IRIS Toxicological Review of Hexavalent Chromium (External Review Draft, 2022) 
• IRIS Toxicological Review of Perfluorodecanoic Acid (PFDA) and Related Salts (External Review Draft) 
• IRIS Toxicological Review of Perfluorohexanesulfonic Acid (PFHxS) and Related Salts (Final Peer Review Report)

See the Full List of updates and recent additions

IRIS Program Outlook Update

• Jun 2024: IRIS Program Outlook Updated  

IRIS Handbook

Learn more about the development of the IRIS Assessments from the IRIS Handbook.