Chapter 2 Current Emissions and Air Quality Table 2-9 Area Maximum 1-Hour Concentration (ppm) Days Exceeding the Standard State 1-Hour National 1-Hour National 8-Hour South Coast 0.17 119 47 98 San Francisco Bay Area 0.16 16 2 7 San Joaquin Valley 0.16 125 33 124 San Diego 0.12 15 0 13 Sacramento Metro Area 0.16 57 10 44