Perchloroethylene			
County	Air Basin	tons/year	Percent
Los Angeles	South Coast	3431	30%
San Diego	San Diego	1631	14%
Orange	South Coast	1552	14%
San Bernardino	South Coast	462	4%
Alameda	San Francisco Bay Area	371	3%
Riverside	South Coast	336	3%
Santa Clara	San Francisco Bay Area	322	3%
Sacramento	Sacramento Valley	258	2%
San Francisco	San Francisco Bay Area	226	2%
Monterey	North Central Coast	221	2%