California Air Resources Board California Map with County Boundaries
Ozone Data Summaries (1980-1998)
Tehama 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 12 0 11 0.12 0.12 0.103 0.112 0.086
1997 2 0 2 0.10 0.10 0.099 0.093 0.083
1996 4 0 0 0.11 0.10   0.084 0.084
1995 10 0 9 0.11 0.10 0.108 0.103 0.086
1994 2 0 3 0.10 0.10 0.104 0.087 0.086
1993 5 0 4 0.10 0.10 0.107 0.093 0.086
1992 9 0 9 0.10 0.11   0.091 0.089
1991 6 0 2 0.11 0.11   0.085 0.089
1990 15 0 11 0.12 0.11   0.100 0.095
* 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