EPA established a no discharge zone for the marine waters of California for sewage discharges from large passenger and oceangoing vessels 300 gross tons or greater.

In re Oil Spill by the Oil Rig Deepwater Horizon, No. MDL 2179 (E.D. La. Feb. 17, 2012). A settling CWA defendant responsible for the discharge of oil into the Gulf of Mexico must pay a $45 million civil penalty to the United States and $25 million to the states of Alabama, Florida, Louisiana, Mississippi, and Texas and must perform supplemental environmental projects valued at $20 million in the Gulf states. 

EPA announced that it will approve implementation of Illinois' rules on long-term enhanced surface water treatment and on disinfectants and disinfection byproducts.

EPA Region 6 reissued the NPDES general permit authorizing discharges from exploration, development, and production facilities in the territorial seas off Texas.