Anti-abortion advocates, including Republican lawmakers and state officials, want the EPA to review mifepristone as a water contaminant. Scientists say there’s no evidence it harms the environment or people.

While there is no scientific evidence that abortion medication is contaminating Americans’ water supply, it has nonetheless become a central claim by the anti-abortion movement. Activists, Instagram influencers and Republican Party officials — including state and federal lawmakers — are doubling down on what experts describe as a disinformation campaign that mixes environmental policy and reproductive rights, and risks exploiting legitimate concerns about clean water.