In an unpublished opinion, the Ninth Circuit vacated a district court finding that adding fluoride to drinking water at a concentration of 0.7 milligrams per liter (mg/L) presented an unreasonable…

A district court granted in part and denied in part nonprofit groups' motion for summary judgment in a challenge to the Army Corps of Engineers' authorization of a wetland project in the…

The D.C. Circuit, 2-1, affirmed summary judgment for environmental groups in a challenge to EPA's approval of Florida's CWA §404 permitting application and FWS' programmatic biological…

The Ninth Circuit, 2-1, affirmed summary judgment for an environmental group in a challenge to EPA's promulgation of CWA §304(a) recommendations for cadmium. The group argued EPA failed to consult…

The Fifth Circuit, 2-1, reversed in part and affirmed in part a district court ruling in a lawsuit concerning lead in Jackson, Mississippi's drinking water. Representatives of residents of the…

A district court denied summary judgment for the Navy in a CWA citizen suit concerning the release of fuel into bodies of freshwater on the island of Oahu. Environmental groups sued, arguing the…

A district court granted EPA's motion to dismiss a lawsuit seeking to compel agency action regarding regulation of sewage sludge under the CWA. Texas farmers and ranchers sued EPA, arguing the…

The Ninth Circuit affirmed summary judgment in part for the Bureau of Reclamation in a challenge to a California irrigation project that has operated without an NPDES permit since 1997 pursuant to…

A district court granted EPA's motion to dismiss a challenge to its 2022 denial of a coal-fired power plant's request to extend the deadline to comply with an amendment to the Agency's 2015…

A district court granted an environmental group's motion for preliminary injunction in a CWA citizen suit brought against a chemical manufacturer for discharging per- and polyfluoroalkyl…