2005 PM10 Air Quality Table "Table 2-13, Page 2-25" AIR BASIN 2005 Maximum 24-Hour Concentration in micrograms/cubic meter 2005 Maximum Annual Average of Quarters in micrograms/cubic meter State National State National Great Basin Valleys Air Basin 1720 3988 30.1 41.8 Lake County Air Basin 20 9.7 Lake Tahoe Air Basin 33 38 14.8 17.5 Mojave Desert Air Basin 70 131 26.1 28.7 Mountain Counties Air Basin 73 127 18.0 29.9 North Central Coast Air Basin 69 66 24.3 23.6 North Coast Air Basin 71 67 18.6 18.0 Northeast Plateau Air Basin 28 29 13.3 13.9 Sacramento Valley Air Basin 109 110 30.4 27.2 Salton Sea Air Basin 220 211 52.7 53.2 San Diego Air Basin 154 155 28.6 49.8 San Francisco Bay Area Air Basin 81 78 24.2 23.5 San Joaquin Valley Air Basin 137 131 44.5 43.2 South Central Coast Air Basin 87 83 25.6 27.7 South Coast Air Basin 131 131 50.4 51.8