California Air Resources Board 2007 Almanac (web)							
Appendix E	"Butte County, Sacramento Valley Air Basin"						Table E-40
Category	ROG	CO	NOX	SOX	PM10	PM2.5	NH3
Natural Sources Total	44	89	3	1	9	8	1
Biogenic Sources	41	0	0	0	0	0	0
Geogenic Sources	0	0	0	0	0	0	0
Wildfires	3	89	3	1	9	8	1