California Air Resources Board 2009 Almanac (web) Chapter 2 Statewide Table 2-3 NOX Emissions (annual average) Emissions Source tons/day Percent Stationary Sources 367.66 11% Area-wide Sources 94.75 3% On-Road Mobile 1584.60 49% Gasoline Vehicles 627.28 20% Diesel Vehicles 957.32 30% Other Mobile 1162.44 36% Gasoline Vehicles 278.14 9% Diesel Vehicles 810.16 25% Other 74.15 2% Total Statewide 3209.45 100%