Deepwater Horizon oil spill 17 of whom were treated for injuries. The Deepwater Horizon sank on the morning of 22 April 2010. The oil leak was discovered on the afternoon of 22 April 2010 when a large oil slick began to spread at the former rig site. The oil flowed for 87 days. BP originally estimated a flow rate of . The Flow Rate Technical Group (FRTG) estimated the initial flow rate was . The total estimated volume of leaked oil approximated with plus or minus 10% uncertainty, including oil that was collected, making it the world's largest accidental spill. BP challenged the higher
Economic effects of the Deepwater Horizon oil spill the total liability could amount to as much as by the conclusion of the disaster. Financial analysts commented that BP was capable of addressing the potential liabilities that might result, and BP stock rose slightly on the news that the initial compensation fund had been agreed. On 5 July 2010, BP reported that its own expenditures on the oil spill had reached $3.12 billion, including the cost of the spill response, containment, relief well drilling, grants to the Gulf states, claims paid, and federal costs. As of 1 October 2010, BP has spent $11.2 billion. As of March 2012, BP