2003 Almanac (page 245)  Table 5-21  2002 Top Ten Counties:  Diesel Particulate Matter			

Diesel Particulate Matter			
County	Air Basin	tons/year	Percent
Los Angeles	South Coast	4563	18%
Orange	South Coast	1822	7%
San Diego	San Diego	1800	7%
Fresno	San Joaquin Valley	1157	5%
Alameda	San Francisco Bay Area	976	4%
Santa Clara	San Francisco Bay Area	971	4%
Riverside	South Coast	907	4%
Kern	San Joaquin Valley	898	3%
San Francisco	San Francisco Bay Area	848	3%
Sacramento	Sacramento Valley	784	3%