California Air Resources Board California Map with County Boundaries
Ozone Data Summaries (1980-1998)
Santa Cruz County
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 1 0 0 0.11 0.09 0.097 0.077 0.068
1997 0 0 0 0.09 0.09 0.095 0.071 0.067
1996 2 0 2 0.11 0.09 0.085 0.088 0.066
1995 1 0 0 0.10 0.10 0.090 0.070 0.062
1994 0 0 0 0.09 0.10 0.081 0.078 0.072
1993 7 0 2 0.10 0.10 0.085 0.086 0.073
1992 0 0 0 0.09 0.08 0.082 0.075 0.066
1991 2 0 0 0.12 0.09 0.084 0.082 0.058
1990 1 0 0 0.10 0.08 0.077 0.080 0.060
1989 1 0 1 0.10 0.09 0.079 0.087 0.061
1988 0 0 0 0.08 0.09   0.070 0.062
1987 0 0 0 0.09 0.09 0.098 0.073 0.067
1986 0 0 0 0.09 0.09   0.077 0.066
1985 2 0 2 0.11 0.09   0.088 0.069
1984 0 0 0 0.08 0.09 0.089 0.072 0.064
1983 1 0 0 0.10 0.09 0.091 0.071 0.065
1982 0 0 0 0.09 0.10 0.095 0.073 0.069
1981 3 0 0 0.10 0.10 0.099 0.080 0.070
1980 8 0 1 0.11 0.10   0.088 0.068
* 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   
District/Site Directory  |  County/Site Directory  |  Monitoring Site Directory 
ARB Home Page  |   Search ARB Programs/Topics  |   Email ARB Help Attendant