California Air Resources Board 2007 Almanac (web)							
Appendix E	"Napa County, San Francisco Bay Area Air Basin"						Table E-59
Category	ROG	CO	NOX	SOX	PM10	PM2.5	NH3
Natural Sources Total	27	37	1	0	4	3	1
Biogenic Sources	26	0	0	0	0	0	0
Geogenic Sources	0	0	0	0	0	0	0
Wildfires	1	37	1	0	4	3	0