California Air Resources Board California Map with District Boundaries
Ozone Data Summaries (1980-1998)
Sacramento Metro AQMD
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 42 13 29 0.16 0.15 0.137 0.137 0.097
1997 21 3 9 0.14 0.13 0.141 0.107 0.097
1996 49 7 29 0.16 0.15 0.154 0.126 0.106
1995 39 10 32 0.16 0.15 0.149 0.128 0.106
1994 36 6 24 0.15 0.14 0.148 0.121 0.104
1993 26 6 14 0.15 0.15 0.159 0.118 0.110
1992 52 9 35 0.15 0.15 0.158 0.122 0.101
1991 55 12 45 0.19 0.15 0.153 0.140 0.100
1990 29 8 20 0.15 0.16 0.162 0.108 0.101
1989 60 8 32 0.17 0.16 0.166 0.133 0.114
1988 86 30 58 0.17 0.16 0.171 0.130 0.114
1987 74 17 53 0.17 0.16 0.168 0.127 0.114
1986 48 22 36 0.16 0.18 0.173 0.125 0.118
1985 48 18 32 0.20 0.18 0.173 0.161 0.118
1984 58 23 44 0.21 0.18 0.162 0.138 0.115
1983 52 12 38 0.17 0.16 0.163 0.125 0.114
1982 56 17 36 0.16 0.16 0.159 0.133 0.112
1981 58 18 42 0.18 0.17 0.125 0.142 0.115
1980 43 15 28 0.18 0.19 0.168 0.132 0.121
* 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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