South Coast Air Quality Management District
 

Figure 1
 

OZONE, 1976 - 1999
 Number of Days Exceeding Stage 1 Episode Level (0.20 ppm) and
Maximum 1-Hour Average Concentration (ppm)

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Figure 1 - Number of Days Exceeding Stage 1 Episode Level (0.20 ppm) and Maximum 1-Hour Average Concentration (ppm) 
 

Figure 2
 

Maximum Pollutant Concentrations as Percent of Federal Standards
South Coast Air Basin Compared to U.S. Metropolitan Areas

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Figure 2 - Maximum Pollutant Concentrations as Percent of Federal Standards South Coast Air Basin Compared to U.S. Metropolitan Areas 
 

Figure 3
 

Percent of Days Exceeding Federal Standards in the Basin, 1976-1999

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Figure 3 - Percent of Days Exceeding Federal Standards in the Basin, 1976-1999 
 

Figure 4
 

5-Year Average of Number of Days Per Month
Exceeding Federal Ozone Standard in the Basin

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Figure 4 - 5-Year Average of Number of Days Per Month Exceeding Federal Ozone Standard in the Basin 
 

Return to 1999 Air Quality

 

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This page updated: 10/24/00

URL: http://www.aqmd.gov/smog/aqscr99/99aqscrfigs.htm