The Tenth Circuit affirmed a lower court decision denying an environmental group's motion to preliminarily enjoin the construction of an oil pipeline to run from Cushing, Oklahoma, to oil refineries along the Gulf Coast near Port Arthur, Texas. The group argued that the U.S. Army Corps of Engineers ...

A district court ordered EPA to conduct a necessity determination under CWA §303(c)(4)(B) in response to an environmental group's petition asking the Agency to establish water quality standards to control nitrogen and phosphorous pollution in the mainstem of the Mississippi River and the Northern G...

A district court upheld EPA's final TMDL for the Chesapeake Bay against challenges from farmer and home building groups. The TMDL—the largest ever developed by EPA—identifies the necessary pollution reductions of nitrogen, phosphorus, and sediment across Delaware, Maryland, New York, Pennsylvani...