para-Dichlorobenzene			
County	Air Basin	tons/year	Percent
Los Angeles	South Coast	434	28%
Orange	South Coast	135	9%
San Diego	San Diego	133	9%
Santa Clara	San Francisco Bay Area	79	5%
Alameda	San Francisco Bay Area	66	4%
San Bernardino	South Coast	61	4%
Riverside	South Coast	56	4%
Sacramento	Sacramento Valley	55	4%
Contra Costa	San Francisco Bay Area	43	3%
Fresno	San Joaquin Valley	38	2%