Chapter 5 Statewide Table 5-13 para-DiChlorobenzene County Air Basin tons/year Percent Los Angeles South Coast 497 26% San Diego San Diego 161 9% Orange South Coast 156 8% Santa Clara San Francisco Bay Area 93 5% Alameda San Francisco Bay Area 78 4% San Bernardino South Coast 72 4% Riverside South Coast 70 4% Sacramento Sacramento Valley 67 4% Contra Costa San Francisco Bay Area 51 3% Fresno San Joaquin Valley 46 2%