California Air Resources Board 2007 Almanac (web)			
Chapter 5	Table 5-10		Statewide
Carbon Tetrachloride			
County	Air Basin	tons/year	Percent
Contra Costa	San Francisco Bay Area	1	47%
Orange	South Coast	1	28%
San Diego	San Diego	<1	5%
Riverside	South Coast	<1	4%
Los Angeles	South Coast	<1	4%
San Bernardino	South Coast	<1	3%
Ventura	South Central Coast	<1	3%
Sacramento	Sacramento Valley	<1	3%
San Bernardino	Mojave Desert	<1	2%
Kern	Mojave Desert	<1	1%