A district court vacated EPA's denial of an environmental group's petition to issue new and revised water quality standards for the state of Washington. The group argued that EPA acted arbitrarily and capriciously in denying its petition, and sought to have the denial vacated and the petition remand...

A district court dismissed as moot a lawsuit seeking to reinstate a permit for the Keystone XL oil pipeline to cross the U.S.-Canada border. Twenty-three states challenged the president's authority to revoke the permit, arguing the permitting decision concerned only international and interstate comm...

The Ninth Circuit remanded EPA's issuance of an NPDES general permit for concentrated animal feeding operations (CAFOs) in Idaho. Environmental groups challenged the permit, arguing it lacked sufficient monitoring provisions to ensure compliance with its discharge limitations. The court found that t...