The Santa Barbara oil spill occurred in January and February 1969 in the Santa Barbara Channel, near the city of Santa Barbara in Southern California. It was the largest oil spill in United States waters at the time. It remains the largest oil spill to have occurred in the waters off California.
The source of the spill was the January 28, 1969, blow-out on Union Oil's Platform A, located 6 miles (10 km; 5 nmi) from the coast in the Dos Cuadras Offshore Oil Field. Within a ten-day period, an estimated 80,000 to 100,000 barrels (13,000 to 16,000 m; 3,400,000 to 4,200,000 US gal) of crude oil spilled into the Channel and onto the beaches of Santa Barbara County in Southern California, fouling the coastline from Goleta to Ventura as well as the northern shores of the four northern Channel Islands. The spill had a significant impact on marine life in the Channel, killing an estimated 3,500 sea birds, as well as marine animals such as dolphins, elephant seals, and sea lions. The public outrage engendered by the spill, which received prominent media coverage in the United States, resulted in numerous pieces of environmental legislation within the next several years, legislation that forms the legal and regulatory framework for the modern environmental movement in the U.S.
