Volume and extent of the Deepwater Horizon oil spill Volume and extent of the Deepwater Horizon oil spill The "Deepwater Horizon" oil spill was discovered on the afternoon of 22 April 2010 when a large oil slick began to spread at the former rig site. According to the Flow Rate Technical Group, the leak amounted to about of oil, exceeding the 1989 "Exxon Valdez" oil spill as the largest ever to originate in U.S.-controlled waters and the 1979 Ixtoc I oil spill as the largest spill in the Gulf of Mexico. BP has challenged this calculation saying that it is overestimated as it includes over of oil which was
Oil spill governance in the United States covers inland oil spills. It is required by US federal law that any discharge of oil that creates a film or sheen on the water surface be reported to the National Response Centre. The National Response Centre then dissipates information to the USCG who acts as the federal on-scene coordinator. The USCG are the primary federal response authority in coastal water hence having the overall power to ensure the effective cleanup of oil spills and lead actions that prevent further discharge from the spill source. The resulting activities that follow up an oil spill involving federal, state and private parties