The justices ruled that the agency cannot impose generic prohibitions against violating water quality standards.

The 5-4 ruling found that the U.S. Environmental Protection Agency permits were too vague in their interpretation of the Clean Water Act.

By a 5-4 vote, the court's conservative majority ruled that the Environmental Protection Agency overstepped its authority ...

The 5-to-4 decision is the latest setback for the agency and could have sweeping implications for curtailing water pollution offshore. By Abbie VanSickle and Adam Liptak Reporting from Washington ...

The Supreme Court on Tuesday struck down rules regulating the discharge of water pollution, narrowing the landmark Clean Water Act in an unusual case that pitted one of the nation’s greenest ...