Section 401 of the Clean Water Act is under threat — and the clock is ticking. The EPA has opened a public comment period on a new proposed rule that would dramatically curtail the authority of states and federally recognized Tribes to protect local water quality. If finalized, this rule would allow federal projects — hydroelectric facilities, interstate oil and gas pipelines, and major dredge-and-fill infrastructure — to move forward without meaningful state or Tribal review. And unlike past rollbacks driven by industry lobbying, this one doesn’t even have broad support from big polluters. That should tell you something.