California Air Resources Board 2008 Almanac (web)			
Chapter 5	Table 5-22		Statewide
Diesel PM			
County	Air Basin	tons/year	Percent
Los Angeles	South Coast	6525	15%
Kern	San Joaquin Valley	2099	5%
San Diego	San Diego	2083	5%
San Bernardino	Mojave Desert	1759	4%
Orange	South Coast	1587	4%
Alameda	San Francisco Bay Area	1584	4%
Fresno	San Joaquin Valley	1519	4%
San Joaquin	San Joaquin Valley	1213	3%
San Bernardino	South Coast	1075	3%
Riverside	South Coast	1058	2%