Petroleum refining is another important component of the South Bay's economy.
Major South Bay refiners include Tesoro (ARCO facility in Carson), Chevron (El Segundo), Phillips 66 (Wilmington), PBF Energy (Torrance), Tesoro (Wilmington), and Valero (Wilmington).
 These refiners supply the lion's share of petroleum products for Southern California, as well as for Nevada and Arizona.
 As the Los Angeles region's oil fields are mostly exhausted, most of the crude oil that feeds the refineries is brought in from terminals at the port.

Local politicians and activists have long denounced the refineries for the amount of air pollution they generate, but in recent years these protests have been muted as the Port of Los Angeles has become the region's dominant polluter.
The controversial practice of residue flaring returned to the forefront during the September 12, 2005 Los Angeles Department of Water and Power outage; facing dangerous pressure buildups, refinery operators in Wilmington were forced to flare, resulting in dangerously bad air quality throughout the southeastern South Bay.
 The incident has renewed calls for restrictions on flaring in non-emergency situations.
Petroleum refining is another important component of the South Bay's economy. Major South Bay refiners include Tesoro (ARCO facility in Carson), Chevron (El Segundo), Phillips 66 (Wilmington), PBF Energy (Torrance), Tesoro (Wilmington), and Valero (Wilmington).  These refiners supply the lion's share of petroleum products for Southern California, as well as for Nevada and Arizona.  As the Los Angeles region's oil fields are mostly exhausted, most of the crude oil that feeds the refineries is brought in from terminals at the port.
Local politicians and activists have long denounced the refineries for the amount of air pollution they generate, but in recent years these protests have been muted as the Port of Los Angeles has become the region's dominant polluter. The controversial practice of residue flaring returned to the forefront during the September 12, 2005 Los Angeles Department of Water and Power outage; facing dangerous pressure buildups, refinery operators in Wilmington were forced to flare, resulting in dangerously bad air quality throughout the southeastern South Bay.  The incident has renewed calls for restrictions on flaring in non-emergency situations.
South Bay (Los Angeles County)