California Air Resources Board California Map with County Boundaries
Ozone Data Summaries (1980-1998)
Solano County Portion
of the San Francisco Bay Area 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 9 0 3 0.12 0.11 0.115 0.097 0.077
1997 1 0 0 0.10 0.11 0.114 0.083 0.078
1996 8 0 3 0.11 0.11 0.114 0.095 0.079
1995 13 1 5 0.13 0.11 0.111 0.099 0.077
1994 3 0 0 0.11 0.10 0.102 0.082 0.073
1993 4 1 2 0.13 0.10 0.103 0.096 0.074
1992 4 0 2 0.10 0.10 0.100 0.086 0.074
1991 5 0 1 0.11 0.10 0.103 0.087 0.074
1990 2 0 1 0.11 0.11 0.107 0.087 0.074
1989 4 0 1 0.12 0.11 0.117 0.086 0.078
1988 6 1 2 0.13 0.11 0.111 0.093 0.077
1987 14 0 5 0.12 0.11 0.113 0.092 0.077
1986 0 0 0 0.09 0.12 0.112 0.076 0.073
1985 7 0 1 0.12 0.13 0.119 0.087 0.075
1984 13 4 5 0.14 0.13 0.118 0.095 0.074
1983 7 2 1 0.13 0.12 0.109 0.097 0.072
1982 4 0 1 0.11 0.12 0.104 0.088 0.074
1981 4 0 0 0.12 0.12 0.105 0.077 0.076
1980 6 1 3 0.14 0.12 0.116 0.102 0.082
* 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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