Chapter 2 Current Emissions and Air Quality -- Criteria Pollutants Table 2-14 AIR BASIN 2001 Maximum 24-Hour Concentration in micrograms/cubic meter 2001 Maximum Annual Average of Quarters in micrograms/cubic meter Great Basin Valleys Air Basin 4482 69.8 Lake County Air Basin 21 7.6 Lake Tahoe Air Basin 58 19.8 Mojave Desert Air Basin 115 29.8 Mountain Counties Air Basin 312 33.3 North Central Coast Air Basin 72 29.4 North Coast Air Basin 73 24.1 Northeast Plateau Air Basin 105 25.1 Sacramento Valley Air Basin 105 30.2 Salton Sea Air Basin 647 86.2 San Diego Air Basin 107 49.1 San Francisco Bay Area Air Basin 109 28.9 San Joaquin Valley Air Basin 205 57.4 South Central Coast Air Basin 152 44.4 South Coast Air Basin 219 63.3