California Air Resources Board California Map with County Boundaries
PM10 Air Quality Data Summaries (1988-1997)
Riverside County Portion
of the South Coast 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 69 4 Y Y 227       56.3   65.6   208.4   227       
1996 69 2 Y Y 162       52.0   62.8   212.8   162       
1995 59 7 Y Y 219       51.8   68.8   240.0   219       
1994 66 1 Y Y 161       56.0   65.5   186.9   161       
1993 65 4 Y Y 231       58.0   72.5   201.2   231       
1992 62 0 Y Y 126       49.3   62.6   188.2   126       
1991 75 3 Y Y 179       65.5   76.0   249.1   179       
1990 75 6 Y Y 250       66.9   78.2   265.2   250       
1989 83 11 Y Y 252       81.3   93.0   270.4   252       
1988 84 8 Y Y 252       81.8   94.5     252       

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 8, 1999

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