California Air Resources Board 2006 Almanac (web)										
Chapter 4	Sacramento Valley Air Basin 						Table 4-55			
"NOx Emission Trends (tons/day, annual average)"										
Emission Source	1975	1980	1985	1990	1995	2000	2005	2010	2015	2020
All Sources	334	360	356	388	341	300	249	203	165	140
Stationary Sources	37	32	30	44	46	41	38	38	39	38
Area-wide Sources	9	9	9	10	9	9	9	9	9	9
On-Road Mobile	179	194	208	216	182	147	113	80	53	36
   Gasoline Vehicles	147	148	143	132	112	78	54	38	25	18
   Diesel Vehicles	32	46	65	84	70	68	59	43	27	18
Other Mobile	109	126	109	118	105	103	89	75	65	57
   Gasoline Fuel	3	3	4	5	5	6	7	7	6	6
   Diesel Fuel	103	119	101	109	95	92	77	63	53	44
   Other Fuel	3	4	4	4	4	5	5	5	6	6