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…

A district court dismissed an environmental groups' lawsuit challenging EPA's decision to stay a 2015 CWA rule concerning effluent limitations for steam electric power plants. The rule…

The Fourth Circuit held that citizens may bring suit alleging a violation of the CWA when the source of the pollution is no longer releasing the pollutant, but the pollutant continues to be…

A district court held it could not rule on the merits as to whether EPA violated the APA when it approved Ohio's 2016 impaired water list, but nevertheless remanded the case to EPA so it…

The Ninth Circuit upheld the U.S. Army Corps of Engineers' issuance of a CWA §404 permit authorizing the discharge of materials into the Santa Clara River as part of a large-scale residential…

Pennsylvania's highest court held that the $10,000/day civil penalty under the Clean Streams Law does not apply to each day that pollutants leaked from an impoundment remain in the…

The Fifth Circuit affirmed a lower court decision dismissing an environmental restoration company's lawsuit against the U.S. Army Corps of Engineers for building new wetlands without…

The Fifth Circuit stayed a preliminary injunction that barred a company from constructing a crude oil pipeline through the environmentally sensitive Atchafalaya Basin. An environmental group…

In a 259-page opinion, a federal claims court held that the U.S. Army Corps of Engineers is responsible for causing recurrent flooding along the Missouri River. Farmers, landowners, and business…

The U.S. Supreme Court held that the United States may pursue claims against New Mexico for violating the Rio Grande Compact, which Colorado, New Mexico, and Texas entered into in the 1930s to…