California Air Resources Board California Map with County Boundaries
Ozone Data Summaries (1980-1998)
Solano County Portion
of the Sacramento Valley Air Basin
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 10 2 7 0.14 0.12 0.117 0.101 0.082
1997 3 0 0 0.11 0.11 0.113 0.083 0.076
1996 8 1 2 0.13 0.11   0.101 0.079
1995 6 0 3 0.12 0.10   0.090 0.079
1990 1 0 1 0.11 0.10   0.088 0.075
1989 4 0 1 0.12 0.12 0.112 0.101 0.082
1988 2 0 2 0.10 0.11 0.108 0.088 0.079
1987 12 0 8 0.12 0.11 0.112 0.102 0.066
1986 0 0 0 0.09 0.09 0.093 0.066 0.055
1985 0 0 0 0.07 0.08 0.081 0.052 0.047
1984 1 0 0 0.10 0.08 0.085 0.070 0.051
1983 0 0 0 0.08 0.09   0.052 0.055
1982 1 0 0 0.10 0.11   0.065 0.069
1981 2 0 1 0.11 0.11   0.086 0.078
1980 7 1 4 0.14 0.13   0.110 0.090
* 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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