On May 6, 2014, the National Research Council (NRC) released a Congressionally mandated, EPA-sponsored report finding that EPA has made "substantial improvements" to its Integrated Risk Information System (IRIS) since 2011. While the report acknowledges these improvements, it provides recommendations for further IRIS enhancements. For instance, according to the National Academies' press release on the report, "to ensure that the IRIS program provides the best assessments possible, the committee recommended that EPA develop a plan for strategically updating its methodology, systematically addressing any identified inefficiencies, and continually evaluating whether the IRIS teams have the appropriate expertise and training."

The National Academies' press release is available online. The EPA press release on the report is available online. The report is available for purchase or can be read online.