California Air Resources Board California Map with County Boundaries
Ozone Data Summaries (1980-1998)
Plumas County
Year Number of Days Standard Exceeded Ozone Concentrations in ppm
1 hour 8 hour
State
1hr
Federal
1hr
Federal
8hr
Max
1hr
3 Year
4th High*
EPDC*
Max
8hr
3 Year Avg
4th High*
1998 0 0 0 0.09 0.08   0.074 0.060
1997 0 0 0 0.05 0.09   0.042 0.065
1996 0 0 0 0.09 0.09 0.094 0.080 0.078
1995 1 0 2 0.11 0.09 0.094 0.096 0.077
1994 0 0 0 0.09 0.09   0.083 0.062
1993 0 0 0 0.09 0.08   0.076 0.053
1992 0 0 0 0.05 0.05   0.040 0.037
1987 0 0 0 0.08 0.08   0.073 0.071
1986 0 0 0 0.09 0.08   0.078 0.073
* The 3 year 4th high, 3 year average 4th high, and Expected Peak Day Concentration (EPDC) are 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.
   

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This page last revised on March 26, 1999

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