No IRIS Act of 2025

This bill would stop the Environmental Protection Agency (EPA) from using its Integrated Risk Information System (IRIS) assessments when making rules, permits, or other regulatory decisions. It also blocks the EPA from using IRIS to help with air toxics assessments or other mapping and screening tools that identify pollution risks in communities.

In plain terms, the EPA could no longer rely on IRIS hazard assessments to shape new pollution limits, enforce standards, issue permits, or guide tools that show where harmful air pollutants may be a problem.

• Who is affected: EPA decision-makers, industries seeking permits or facing rules, and communities that use EPA tools to understand local pollution risks.
• What changes: IRIS assessments cannot be used for rules, enforcement, permitting, or to inform air toxics and other screening/mapping tools.
• When: Would take effect after becoming law (the text does not list a special start date).