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Ozone Data Summary (1995-1998)
 

Upland

South Coast AQMD
 
South Coast Air Basin San Bernardino County
Year % of Days Moni-
tored
Number of Days Standard Exceeded 1-hr Ozone
Concentrations
ppm
8-hr Ozone Concentrations
ppm
State 1-hour Federal 1-hour Federal 8-hour 1st
High
2nd
High
3rd
High
4th
High
EPDC* 1st
High
2nd
High
3rd
High
1998 97 60 30 39 0.213 0.182 0.181 0.176   0.171 0.142 0.141
1997 98 69 12 28 0.186 0.171 0.161 0.158   0.132 0.117 0.116
1996 83 62 20 37 0.205 0.189 0.189 0.176   0.152 0.150 0.132
1995 99 110 67 78 0.235 0.234 0.209 0.208 0.232 0.166 0.154 0.147
* The Expected Peak Day Concentration (EPDC) is calculated based on data for 3 successive years, listed by the last year of the three year period.  The EPDC represents the ozone concentration expected to occur once per year.
   

Please send your questions or comments to:
aqdweb@arb.ca.gov

This page last revised on March 26, 1999.

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