California Air Resources Board California Map with County Boundaries
Ozone Data Summaries (1980-1998)
Mono 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 0.08 0.09   0.075 0.073
1997 0 0 0 0.09 0.09   0.078 0.077
1996 0 0 1 0.09 0.10 0.099 0.090 0.079
1995 2 0 2 0.11 0.10 0.097 0.101 0.079
1994 2 0 3 0.12 0.12   0.092 0.082
1993 0 0 0 0.09 0.12   0.077 0.078
1992 5 3 9 0.15 0.12   0.103 0.081
1991 0 0 0 0.09 0.09   0.073 0.076
1990 2 0 3 0.10 0.10   0.091 0.081
1989 0 0 0 0.08 0.10   0.077 0.081
1988 3 0 6 0.10 0.10 0.100 0.098 0.086
1987 4 0 2 0.10 0.10 0.099 0.091 0.084
1986 5 0 13 0.10 0.10 0.100 0.093 0.082
1985 1 0 2 0.10 0.09   0.090 0.079
1984 0 0 2 0.09 0.09   0.087 0.078
1983 0 0 1 0.09 0.09   0.087 0.076
1982 0 0 0 0.09 0.08   0.082 0.072
* 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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