California Air Resources Board 2006 Almanac (web) Chapter 5 Table 5-13 Statewide para-DiChlorobenzene County Air Basin tons/year Percent Los Angeles South Coast 623 26% San Diego San Diego 203 9% Orange South Coast 197 8% Santa Clara San Francisco Bay Area 116 5% Alameda San Francisco Bay Area 100 4% San Bernardino South Coast 94 4% Riverside South Coast 90 4% Sacramento Sacramento Valley 89 4% Contra Costa San Francisco Bay Area 67 3% Fresno San Joaquin Valley 58 2%