California Air Resources Board 2007 Almanac (web)							
Appendix E	"Humboldt County, North Coast Air Basin"						Table E-31
Category	ROG	CO	NOX	SOX	PM10	PM2.5	NH3
Natural Sources Total	86	149	5	2	16	13	2
Biogenic Sources	81	0	0	0	0	0	0
Geogenic Sources	0	0	0	0	0	0	0
Wildfires	5	149	5	2	16	13	1