- Potential benefitReduces availability of IRIS-based risk findings as basis for stricter chemical limits, potentially lowering compliance…
- Permitting processDecreases regulatory burden and permit conditions that would rely on IRIS assessments.
- Potential benefitCreates clearer expectations for businesses if agencies adopt standardized alternative assessment processes.
No IRIS Act of 2025
Referred to the Subcommittee on Water Resources and Environment.
This bill bars the Environmental Protection Agency from using any assessments produced by the Integrated Risk Information System (IRIS) program. Specifically, it prohibits use of IRIS assessments for rulemaking, regulatory/enforcement/permitting actions, and for informing air toxics assessments or mapping and screening tools.
Liberals emphasize lost public-health protections; conservatives emphasize reduced regulatory burden
Narrow, ideologically driven deregulatory measure likely to split along partisan lines; easier in a chamber favoring deregulatory bills.
This bill bars the Environmental Protection Agency from using any assessments produced by the Integrated Risk Information System (IRIS) program.
Specifically, it prohibits use of IRIS assessments for rulemaking, regulatory/enforcement/permitting actions, and for informing air toxics assessments or mapping and screening tools.
Substantive curb on federal regulatory science with high partisan salience and no compromise features makes ultimate enactment unlikely absent favorable chamber majorities.
How solid the drafting looks.
Liberals emphasize lost public-health protections; conservatives emphasize reduced regulatory burden
Who stands to gain, and who may push back.
These are examples from the analysis, not a ranked list of the most-affected groups.
- Federal agenciesRemoves a central EPA scientific program, weakening the federal scientific basis for chemical risk evaluations.
- Potential burdenCould delay or prevent regulations addressing toxic exposures, increasing public health and environmental risks.
- Potential burdenForces agencies to rework or commission alternative assessments, increasing administrative costs and litigation risk.
Why the argument around this bill splits.
Liberals emphasize lost public-health protections; conservatives emphasize reduced regulatory burden
Likely to view the bill as a damaging limitation on EPA's ability to protect health and environment.
Sees it as removing an established scientific input used to justify regulations and safeguards.
Views the bill with concern about undermining evidence-based regulation, but recognizes problems if IRIS lacks transparency.
Sees need for balance between transparent science and regulatory certainty.
Likely to support the bill as a constraint on regulatory overreach and use of nontransparent assessments.
Sees it as protecting industry and permitting decisions from hidden or unreviewed science.
The path through Congress.
Reached or meaningfully advanced
Reached or meaningfully advanced
Still ahead
Still ahead
Still ahead
Substantive curb on federal regulatory science with high partisan salience and no compromise features makes ultimate enactment unlikely absent favorable chamber majorities.
- No CBO or cost estimate provided
- How 'use' of IRIS is legally interpreted
Recent votes on the bill.
No vote history yet
The bill has not accumulated any surfaced votes yet.
Go deeper than the headline read.
Liberals emphasize lost public-health protections; conservatives emphasize reduced regulatory burden
Substantive curb on federal regulatory science with high partisan salience and no compromise features makes ultimate enactment unlikely abs…
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