California Air Resources Board California map with air basin highlighted
PM10 Air Quality Data Summaries (1988-1997)
Mountain Counties Air Basin
Year % 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
1997 27 0 N N 138       27.4   33.0   72.7   138       
1996 6 0 N N 114       23.3   29.6   92.1   114       
1995 9 0 N N 118       26.7   28.0   126.6   118       
1994 22 0 N N 115       28.7   34.6   142.7   115       
1993 25 0 Y N 130       30.0   36.9   201.6   130       
1992 24 0 Y N 120       31.0   37.4   246.5   120       
1991 31 4 Y N 350       34.1   49.2     350       
1990 37 3 Y N 209       35.6   40.9     209       
1989 30 0 Y Y 144       65.5   77.9     144       
1988 43 2 Y Y 180       102.1   58.1     180       

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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