California Air Resources Board California Map with Basin Highlighted
Basin by Basin Comparison of 1994 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 19 2 Y N 388    30.3  29.8  186.3  388       
Lake County 0 0 N N 21    10.1  11.0  25.6  21       
Lake Tahoe 12 0 N N 78    23.5  27.1    78       
Mountain Counties 22 0 N N 115    28.7  34.6  142.7  115       
Mojave Desert 25 0 Y N 140    36.4  41.7  92.4  140       
North Coast 9 0 N N 77    27.6  30.1  62.8  77       
North Central Coast 7 0 N N 106    27.6  31.1  46.5  106       
Northeast Plateau 5 0 N N 101    25.9  29.6  74.3  101       
South Coast 68 1 Y Y 161    56.0  65.5  242.1  161       
South Central Coast 13 0 Y N 138.8  30.6  32.5  77.3  138.8   
San Diego 29 0 Y Y 129    45.2  50.7  79.5  129       
San Francisco B. A. 12 0 N N 96.9  26.6  32.5  132.0  96.9   
San Joaquin Valley 55 3 Y Y 190    51.2  64.1  204.1  190       
Salton Sea 69 5 Y Y 258    106.8  75.1  168.5  258       
Sacramento Valley 22 0 Y N 154    31.1  34.1  110.6  154       

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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