California Air Resources Board 2004 Almanac (web)			Table 5-21
Chapter 5	Top Ten Counties - Diesel PM Emissions		
Diesel PM			
County	Air Basin	tons/year	Percent
Los Angeles	South Coast	4570	18%
San Diego	San Diego	1704	7%
Orange	South Coast	1678	7%
Fresno	San Joaquin Valley	1027	4%
Riverside	South Coast	999	4%
Santa Clara	San Francisco Bay Area	914	4%
Alameda	San Francisco Bay Area	910	4%
San Bernardino	South Coast	801	3%
San Francisco	San Francisco Bay Area	773	3%
Kern	San Joaquin Valley	764	3%