Chapter 2 Maximum Peak 1-Hour Indicator by Air Basin Table 2-7 AIR BASIN 2002 Maximum Peak 1-Hour Indicator in parts per million Number of Days in 2001 above State Standard Number of Days in 2001 above National 1-Hour Standard Great Basin Valleys Air Basin 0.11 4 0 Lake County Air Basin 0.08 0 0 Lake Tahoe Air Basin 0.09 1 0 Mojave Desert Air Basin 0.14 72 6 Mountain Counties Air Basin 0.14 49 1 North Central Coast Air Basin 0.10 3 0 North Coast Air Basin 0.09 0 0 Northeast Plateau Air Basin 0.09 0 0 Sacramento Valley Air Basin 0.14 46 2 Salton Sea Air Basin 0.16 81 15 San Diego Air Basin 0.12 29 2 San Francisco Bay Area Air Basin 0.12 15 1 San Joaquin Valley Air Basin 0.15 123 32 South Central Coast Air Basin 0.13 34 2 South Coast Air Basin 0.17 121 36