California Air Resources Board California Map with County Boundaries
Ozone Data Summaries (1980-1998)
San Bernardino County Portion
of the South Coast 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 100 58 87 0.24 0.22 0.224 0.206 0.154
1997 122 53 93 0.21 0.22 0.211 0.143 0.148
1996 132 79 110 0.24 0.23 0.231 0.173 0.161
1995 135 91 110 0.26 0.23 0.232 0.203 0.165
1994 158 115 142 0.27 0.25 0.252 0.192 0.171
1993 170 112 157 0.27 0.25 0.252 0.185 0.177
1992 176 123 164 0.28 0.27 0.266 0.211 0.180
1991 160 109 143 0.29 0.27 0.266 0.203 0.182
1990 161 115 145 0.33 0.28 0.273 0.193 0.185
1989 192 143 169 0.32 0.28 0.277 0.252 0.188
1988 193 153 174 0.35 0.29 0.284 0.250 0.195
1987 179 141 163 0.29 0.32 0.304 0.198 0.200
1986 179 145 167 0.31 0.32 0.321 0.240 0.211
1985 184 138 166 0.34 0.32 0.330 0.252 0.211
1984 197 162 178 0.34 0.32 0.328 0.248 0.210
1983 169 137 147 0.36 0.32 0.322 0.236 0.214
1982 175 136 152 0.32 0.36 0.351 0.255 0.222
1981 209 171 186 0.36 0.39 0.394 0.282 0.251
1980 193 157 170 0.44 0.42 0.401 0.287 0.273
* 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.
   

Please send questions or comments to:

aqdweb@arb.ca.gov

This page last revised on March 26, 1999

Other Pollutants  |  Ozone Home Page  |  Air Basin (Site) Selection Map  |  Map for this Basin  
District/Site Directory  |  County/Site Directory  |  Monitoring Site Directory 
ARB Home Page  |   Search ARB Programs/Topics  |   Email ARB Help Attendant