2002 Almanac (page 445)  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	311	179	56	37	159	163	278	175	101
Benzene	677	538	180	109	321	381	859	213	234
"1,3-Butadiene"	102	78	29	16	47	70	127	71	35
Carbon Tetrachloride	0.03	1.46	< .01	< .01	0	< .01	< .01	< .01	0.02
Chromium (Hexavalent)	0.02	< .01	< .01	< .01	< .01	< .01	0.01	0.2	< .01
para-Dichlorobenzene	74	49	13	7	40	37	89	15	20
Formaldehyde	657	520	150	94	380	445	737	539	228
Methylene Chloride	312	140	37	17	112	149	855	39	76
Perchloroethylene	467	248	89	23	284	258	422	54	67
Diesel PM	950	701	158	109	821	391	908	160	300

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