A landmark Environmental Protection Agency rule enacted at the end of last year sought to address the lead crisis—which threatens the health of millions of Americans—by tightening limitations on toxic lead and copper in drinking water. But that might not be the final word.

U.S. Rep. Gary Palmer (R-Ala.) introduced a resolution last month to block it and forever bar the EPA from writing a substantially similar rule again.

Read more from Keerti Gopal with Inside Climate News here.