California Air Resources Board 2007 Almanac (web)							
Appendix E	"Yolo County, Sacramento Valley Air Basin"						Table E-49
Category	ROG	CO	NOX	SOX	PM10	PM2.5	NH3
Natural Sources Total	16	17	1	0	2	2	1
Biogenic Sources	15	0	0	0	0	0	0
Geogenic Sources	0	0	0	0	0	0	0
Wildfires	0	17	1	0	2	2	0