San Joaquin Valley - Formaldehyde Emissions Source tons/year Percent Air Basin Percent State Stationary Sources 641 15% 2% Area-wide Sources 227 5% 1% On-Road Mobile 1239 29% 5% Gasoline Vehicles 857 20% 3% Diesel Vehicles 382 9% 1% Other Mobile 2159 51% 8% Natural Sources 0 0% 0% Total 4266 100% 16% Total Statewide 26329