California Air Resources Board California Map with Basin Highlighted
Ozone Data Summaries (1980-1998)
Salton Sea 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 68 11 38 0.17 0.16 0.153 0.136 0.107
1997 91 13 63 0.16 0.16 0.157 0.120 0.107
1996 97 21 62 0.18 0.18   0.125 0.111
1995 124 33 79 0.23 0.18 0.163 0.132 0.110
1994 126 20 75 0.18 0.15 0.154 0.130 0.113
1993 113 36 80 0.21 0.17 0.159 0.128 0.118
1992 100 31 75 0.17 0.17 0.168 0.128 0.121
1991 86 27 65 0.18 0.18 0.175 0.148 0.125
1990 83 27 56 0.17 0.18 0.181 0.130 0.126
1989 119 38 90 0.19 0.18 0.180 0.160 0.129
1988 107 35 70 0.20 0.18 0.182 0.137 0.130
1987 85 40 72 0.17 0.18 0.185 0.141 0.131
1986 80 31 62 0.18 0.19 0.197 0.142 0.135
1985 96 29 70 0.24 0.19 0.204 0.160 0.134
1984 100 40 79 0.20 0.19 0.202 0.165 0.134
1983 96 50 77 0.19 0.19 0.194 0.150 0.134
1982 96 38 80 0.19 0.20 0.209 0.142 0.144
1981 141 63 110 0.19 0.20 0.216 0.151 0.149
1980 108 50 90 0.21 0.20 0.219 0.162 0.146
* 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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