California Air Resources Board 2008 Almanac (web)			
Chapter 5	Table 5-6		Statewide
Benzene			
County	Air Basin	tons/year	Percent
Los Angeles	South Coast	2143	18%
San Diego	San Diego	869	7%
Orange	South Coast	683	6%
Kern	San Joaquin Valley	655	5%
San Bernardino	Mojave Desert	425	4%
San Bernardino	South Coast	400	3%
Santa Clara	San Francisco Bay Area	395	3%
Alameda	San Francisco Bay Area	389	3%
Riverside	South Coast	353	3%
Sacramento	Sacramento Valley	325	3%