Formaldehyde			
County	Air Basin	tons/year	Percent
Los Angeles	South Coast	4999	19%
San Diego	San Diego	1941	7%
Orange	South Coast	1568	6%
Kern	San Joaquin Valley	1232	5%
San Bernardino	South Coast	850	3%
Santa Clara	San Francisco Bay Area	815	3%
Alameda	San Francisco Bay Area	798	3%
Sacramento	Sacramento Valley	797	3%
Fresno	San Joaquin Valley	774	3%
Riverside	South Coast	699	3%