EPA Releases Public Database on Risk Assessments
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HERO includes peer-reviewed literature used by EPA to develop its Integrated Science Assessments (ISA) that feed into the NAAQS review. It also includes references and data from the Integrated Risk Information System (IRIS), a database that supports critical agency policymaking for chemical regulation.
More information on HERO database: http://www.epa.gov/hero
More information on IRIS: http://www.epa.gov/iris