2003 Almanac (page 449)  Table C-12  County Emissions (tons/year) for Ten Toxic Air Contaminants by Air Basin									
San Francisco Bay Area Air Basin									

TAC	Alameda	Contra Costa	Marin	Napa	San Francisco	San Mateo	Santa Clara	Solano*	Sonoma*
Acetaldehyde	280	172	55	35	150	162	268	174	95
Benzene	438	353	127	69	214	260	545	153	142
"1,3-Butadiene"	90	66	27	14	40	65	107	67	28
Carbon Tetrachloride	< .01	1.31	< .01	< .01	0.00	< .01	< .01	0.00	< .01
Chromium (Hexavalent)	0.06	0.02	0.01	< .01	< .01	0.05	0.04	0.20	< .01
para-Dichlorobenzene	76	49	13	7	42	38	91	15	21
Formaldehyde	631	480	143	87	351	435	720	527	205
Methylene Chloride	265	142	37	20	130	140	458	51	57
Perchloroethylene	191	108	39	13	114	109	226	26	45
Diesel PM	976	732	176	117	848	429	971	169	317

*  This Air Basin includes only a portion of this county.