2002 Almanac (page 249)  Table 5-21  2001 Top Ten Counties:  Diesel Particulate Matter			

Diesel Particulate Matter			
County	Air Basin	tons/year	Percent
Los Angeles	South Coast	4338	18%
Orange	South Coast	1731	7%
San Diego	San Diego	1693	7%
Alameda	San Francisco Bay Area	950	4%
Fresno	San Joaquin Valley	938	4%
Santa Clara	San Francisco Bay Area	908	4%
San Francisco	San Francisco Bay Area	821	3%
Riverside	South Coast	817	3%
Sacramento	Sacramento Valley	807	3%
San Bernardino	South Coast	726	3%