California Air Resources Board California Map with Basin Highlighted
Basin by Basin Comparison of 1997 PM10 Air Quality Data
Basin Name % of Samples
Above 24-Hr Standard
Exceeds Annual
Standard?
PM10 Concentration in ug/m3
State
>50ug/m3
Federal
>150ug/m3
State
AGM
Federal
AAM
Max
24-Hr
Max
AGM
Max
AAM
Max
EPDC
Max 99th
Percentile
Great Basin Valleys 21 4 N N 312    22.2  34.3  394.0  312       
Lake County 0 0 N N 18    7.7  8.6  25.5  18       
Lake Tahoe 4 0 N N 55    19.6  21.6  83.8  55       
Mountain Counties 27 0 N N 138    27.4  33.0  72.7  138       
Mojave Desert 6 0 N N 130    27.4  29.2  65.6  130       
North Coast 5 0 N N 66    20.7  23.4  67.8  66       
North Central Coast 23 0 Y N 113    31.7  36.9  120.9  113       
Northeast Plateau 4 0 N N 97    23.3  27.3  45.2  97       
South Coast 69 5 Y Y 227    56.3  65.6  208.4  227       
South Central Coast 25 3 Y N 321.2  35.0  38.3  159.2  321.2   
San Diego 26 0 Y N 125    41.9  46.6  134.7  125       
San Francisco B. A. 5 0 N N 95    23.7  27.4  85.4  95       
San Joaquin Valley 33 1 Y N 199    43.1  48.1  203.4  199       
Salton Sea 73 15 Y Y 532    76.9  86.8  228.6  532       
Sacramento Valley 12 0 N N 126    25.3  28.6  129.9  126       

Go to Data Explanation Explanation of the terminology in the header above, as well as the sampling program and analytical methods used to collect the data, the PM10 air quality standards, and how to request air quality data.

Please send questions or comments to:

aqdweb@arb.ca.gov

This page last revised on March 1, 1999

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