Chapter 2 Ozone - Maximum Peak 1-Hour Indicator and Exceedance Days by Air Basin Table 2-7 AIR BASIN 2002 Maximum Peak 1-Hour Indicator in parts per million Number of Days in 2002 above State 1-Hour Standard Number of Days in 2002 above National 1-Hour Standard Great Basin Valleys 0.10 8 0 Lake County 0.08 0 0 Lake Tahoe 0.09 1 0 Mojave Desert 0.14 75 16 Mountain Counties 0.14 62 8 North Central Coast 0.10 8 0 North Coast 0.08 0 0 Northeast Plateau 0.09 0 0 Sacramento Valley 0.14 47 7 Salton Sea 0.14 68 5 San Diego 0.12 15 0 San Francisco Bay Area 0.13 16 2 San Joaquin Valley 0.15 127 31 South Central Coast 0.13 24 1 South Coast 0.17 116 45