San Francisco Bay Area - Formaldehyde Emissions Source tons/year Percent Air Basin Percent State Stationary Sources 137 3% 1% Area-wide Sources 352 8% 1% On-Road Mobile 1372 33% 5% Gasoline Vehicles 1038 25% 4% Diesel Vehicles 334 8% 1% Other Mobile 2347 56% 9% Natural Sources 0 0% 0% Total 4208 100% 16% Total Statewide 26329