California Air Resources Board 2006 Almanac (web)							
Appendix E	"Riverside County, South Coast Air Basin"						Table E-81
Category	ROG	CO	NOX	SOX	PM10	PM2.5	NH3
Natural Sources Total	24	38	1	0	4	3	1
Biogenic Sources	22	0	0	0	0	0	1
Geogenic Sources	0	0	0	0	0	0	0
Wildfires	2	38	1	0	4	3	0