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…

The Ninth Circuit remanded a summary judgment order in a challenge to EPA's approval of Montana's variance request from approved water quality standards adopted under the CWA. An…

A district court granted partial summary judgment for environmental groups in a CWA citizen suit concerning water quality standards for mercury in Idaho. The groups argued that EPA's failure…

A district court denied a motion to reconsider its 2018 ruling that gave EPA discretion as to how to establish a new TMDL for trash in the Anacostia River. An environmental group argued that…

The Ninth Circuit affirmed judgment for environmental groups in a CWA challenge to compel EPA to develop and issue long-overdue temperature TMDLs for the Columbia and Snake Rivers. The groups…

A district court denied summary judgment in a challenge to EPA's approval of Maryland's 2018 water quality report, which reclassified 139 impairment listings based on TMDLs set by the…

A district court vacated TMDLs that were established by the District of Columbia for E. Coli bacteria in portions of the Anacostia and Potomac Rivers and approved by EPA in 2014. Environmental…

A district court granted EPA's motion to dismiss a CWA lawsuit seeking to require the Agency to publish New York's water quality standards. The Agency asserted that environmental groups…

A district court ordered EPA to issue a temperature total maximum daily load (TMDL) under the CWA for the Columbia and Snake Rivers, which are native habitat for endangered and threatened salmon…

The Fourth Circuit reversed a lower court's grant of summary judgment requiring EPA and West Virginia to address coal mining-related water pollution. Environmental groups argued that EPA…