Chapter 2 Carbon Monoxide Maximum Peak 8-Hour Indicator by Air Basin Table 2-18 AIR BASIN 2002 Maximum Peak 8-Hour Indicator in parts per million Number of Days in 2002 above State 8-Hour Standard Number of Days in 2002 above National 8-Hour Standard Great Basin Valleys 2.5 0 0 Lake County Incomplete Data Incomplete Data Incomplete Data Lake Tahoe 2.0 0 0 Mojave Desert 2.0 0 0 Mountain Counties 1.6 0 0 North Central Coast 1.5 0 0 North Coast 2.6 0 0 Northeast Plateau Incomplete Data Incomplete Data Incomplete Data Sacramento Valley 6.0 0 0 Salton Sea 12.8 4 3 San Diego 5.3 0 0 San Francisco Bay Area 6.0 0 0 San Joaquin Valley 5.3 0 0 South Central Coast 2.7 0 0 South Coast 9.4 1 1