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Ozone Data Summary (1995-1998)
 

Yreka-Foothill Drive

Siskiyou County APCD
 
Northeast Plateau Air Basin Siskiyou 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 72 0 0 0 0.078 0.077 0.075 0.075   0.071 0.069 0.068
1997 74 0 0 0 0.082 0.070 0.070 0.070   0.074 0.066 0.064
1996 39 0 0 0 0.070 0.070 0.070 0.070   0.063 0.063 0.062
1995 86 0 0 0 0.070 0.070 0.070 0.070 0.074 0.062 0.060 0.057
* 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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