California Air Resources Board 2007 Almanac (web) Chapter 5 Table 5-14 Statewide para-DiChlorobenzene County Air Basin tons/year Percent Los Angeles South Coast 383 26% San Diego San Diego 122 8% Orange South Coast 121 8% Santa Clara San Francisco Bay Area 71 5% Alameda San Francisco Bay Area 61 4% San Bernardino South Coast 60 4% Riverside South Coast 59 4% Sacramento Sacramento Valley 55 4% Contra Costa San Francisco Bay Area 40 3% Fresno San Joaquin Valley 36 2%