South Coast - Formaldehyde Emissions Source tons/year Percent Air Basin Percent State Stationary Sources 321 4% 1% Area-wide Sources 472 6% 2% On-Road Mobile 3687 45% 14% Gasoline Vehicles 2836 35% 11% Diesel Vehicles 851 10% 3% Other Mobile 3637 45% 14% Natural Sources 0 0% 0% Total 8116 100% 31% Total Statewide 26329