This bill prohibits the Environmental Protection Agency from using its Integrated Risk Information System (IRIS) as a primary data source when developing environmental regulations and rules. IRIS is an EPA database that provides scientific assessments of health risks from chemical exposures, and it currently serves as a key tool for EPA decision-making on air quality, water safety, and other environmental standards. The legislation would essentially require the EPA to rely on other data sources instead when creating new environmental protections and regulatory actions. The bill does not specify alternative data sources or include funding provisions. This could significantly impact how quickly the EPA can establish and update health-protective environmental standards, as IRIS assessments have historically streamlined the regulatory process.