2002 Almanac (page 71)  Table 2-12  Maximum Annual Geometric Mean PM10 Concentration by Air Basin	

	2000 Maximum Annual Geometric Mean in
AIR BASIN	micrograms/cubic meter
Great Basin Valleys Air Basin	17.4
Lake County Air Basin	9.6
Lake Tahoe Air Basin	17.6
Mojave Desert Air Basin	19.3
Mountain Counties Air Basin	16.1
North Central Coast Air Basin	23.5
North Coast Air Basin	19.8
Northeast Plateau Air Basin	17.6
Sacramento Valley Air Basin	24.7
Salton Sea Air Basin	73
San Diego Air Basin	31.6
San Francisco Bay Area Air Basin	23.7
San Joaquin Valley Air Basin	45.4
South Central Coast Air Basin	26.2
South Coast Air Basin	54.6