No IRIS Act of 2024

The No IRIS Act of 2024 prohibits the Environmental Protection Agency (EPA) from using assessments from its Integrated Risk Information System (IRIS) program as the primary data source for three specific actions: developing new regulations, carrying out regulatory decisions, or informing the National Air Toxics Assessment. This bill directly affects the EPA's regulatory process by restricting how it can use scientific risk assessments in rulemaking. The key provision bars the EPA Administrator from relying on IRIS-generated data as the main basis for these actions, requiring the use of other data sources instead. The bill does not create new environmental standards but limits the EPA's reliance on one specific scientific tool in its decision-making. This is a procedural restriction on EPA data use, not a direct change to environmental protections.