California Air Resources Board 2009 Almanac (web)			
Chapter 5	Table 5-6		Statewide
Benzene			
County	Air Basin	tons/year	Percent
Los Angeles	South Coast	1761	16%
San Diego	San Diego	770	7%
Kern	San Joaquin Valley	645	6%
Orange	South Coast	597	6%
San Bernardino	Mojave Desert	397	4%
Santa Clara	San Francisco Bay Area	357	3%
San Bernardino	South Coast	346	3%
Alameda	San Francisco Bay Area	328	3%
Riverside	South Coast	302	3%
Sacramento	Sacramento Valley	292	3%