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Pasqua Yaqui Tribe v. United States Environmental Protection Agency

A district court vacated and remanded EPA's and the Army Corps of Engineers' Navigable Waters Protection Rule, which established a new definition of "waters of the United States" under the CWA. EPA and the Corps sought voluntary remand of the rule without vacatur to give them time to revise or repla...

Sackett v. U.S. Environmental Protection Agency

The Ninth Circuit affirmed summary judgment for EPA in a challenge to a compliance order stating that landowners' property in Idaho contained wetlands subject to CWA protection and directing them to remove fill and restore the property to its natural state. The appellate court concluded that EPA rea...

Earth Island Institute v. Regan

A district court granted summary judgment for an environmental group in a challenge to EPA's regulations for oil spill dispersants. The group argued that EPA violated the CWA by failing to issue a final rule updating the NCP for addressing oil spills in light of new information showing the chemicals...

Hawai'i Wildlife Fund v. Maui, County of

A district court granted summary judgment for environmental groups in an ongoing dispute over a Hawaii county's release of pollutants into injection wells at a wastewater reclamation facility near the Pacific Ocean. The groups argued the county violated the CWA by failing to obtain an NPDES permit f...

Clean Wisconsin, Inc. v. Wisconsin Department of Natural Resources

The Wisconsin Supreme Court held, 4-2, that the Wisconsin Department of Natural Resources (WDNR) had the explicit authority to impose an animal unit maximum condition and an off-site groundwater monitoring condition on a Wisconsin Pollutant Discharge Elimination System (WPDES) permit it reissued to ...

Conservation Law Foundation v. Exxon Mobil Corp.

The First Circuit vacated a district court order staying a CWA and RCRA citizen suit brought against an oil company. An environmental group argued, among other things, that the company had violated CWA and RCRA by failing to account for climate change factors at its petroleum storage and distributio...

Prairie Rivers Network v. Dynegy Midwest Generation, LLC

The Seventh Circuit affirmed dismissal of a CWA citizen suit brought against the owner of a coal-fired power plant in Illinois. An environmental group argued the owner violated the CWA by discharging coal ash pollutants from its plant into groundwater that in turn entered the Middle Fork of the Verm...