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Definitions, §502

Ohio v. United States Environmental Protection Agency

The Sixth Circuit dismissed as moot a lawsuit seeking to preliminarily enjoin EPA's 2015 Clean Water Rule that clarified the definition of "waters of the United States" under the CWA. Ohio and Tennessee challenged the validity of the...

Maui, Hawaii v. Hawaii Wildlife Fund

The U.S. Supreme Court held, 6-3, that the "functional equivalent of a direct discharge" of pollutants requires a CWA permit, and remanded for consideration of whether a discharge of pollutants into groundwater that later discharged...

Oklahoma v. United States Environmental Protection Agency

The Tenth Circuit denied a motion to hold in abeyance a lawsuit concerning EPA and the U.S. Army Corps of Engineers' 2015 Clean Water Rule. It did decide, however, to consider whether to dismiss the case in light of the Trump...

Georgia v. Wheeler

A district court granted a motion for summary judgment in a challenge to EPA and the U.S. Army Corps of Engineers' 2015 Clean Water Rule. States and industry groups argued the rule violated the CWA by extending the agencies'...

Ohio v. United States Environmental Protection Agency

A district court denied Ohio's and Tennessee's motion to preliminarily enjoin EPA's 2015 Clean Water Rule that clarified the definition of "waters of the United States" under the CWA. The states challenged the validity of the rule,...

Puget Soundkeeper Alliance v. Wheeler

A district court vacated nationwide the Applicability Date Rule, which suspended the effect of the Clean Water Rule until February 2020 and required agencies in the interim to apply the pre-Clean Water Rule definition of "waters of the...

North Dakota v. U.S. Environmental Protection Agency

A North Dakota district court enjoined in Iowa the 2015 Clean Water Rule, which clarifies the definition of "waters of the United States" that are protected under the CWA. The governor of Iowa sought an order from the court expressly...

Georgia v. Pruitt

A district court granted 11 states' motion to preliminarily enjoin EPA and the U.S. Army Corps of Engineers from implementing the "waters of the United States" rule, also known as the WOTUS rule or Clean Water Rule. The states...

New York v. Pruitt

A district court denied the U.S. government's request to transfer to the Southern District of Texas two cases challenging the Trump Administration's delay of the Clean Water Rule. One lawsuit was brought by the state of New York, and...

Murray Energy Corp. v. United States Department of Defense

The Sixth Circuit, in litigation over the "waters of the United States" (WOTUS) rule, held that an internal U.S. Army Corps of Engineers memorandum critical of the rule's technical analysis may be included in the record. Petitioners...