The U.S. Environmental Protection Agency has proposed a regulatory revision that would reverse a Trump-era limitation.

Industry groups praise U.S. Supreme Court order reinstating a Trump-era cutback, but environmental advocates say the action will create a lot of confusion. 

Scope of federal jurisdiction on lands near certain bodies of water is core to landowner challenge, but timing of court action will determine if Justice Stephen Breyer, a veteran of Clean Water Act rulings, can weigh in before he retires.

Construction groups praise the rule but environmental organizations strongly oppose it, with lawsuits expected.

Case centers on whether pollution moving through groundwater should require "point source" permit.