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California Air Resources Board

Annual Toxics Summary		 ARB's ADAM Air Quality Database
Fresno-1st Street
Chloroform
parts per billion
Year Months
Present		 Minimum Median Mean 90th
Percentile		 Maximum Standard
Deviation		 Number of
Observations		 Detection
Limit		 Estimated
Risk
2002
0.01 0.03 0.029 0.04 0.05 0.011 31 0.02 0.8
2001
0.01 0.03 0.029 0.05 0.06 0.014 30 0.02 0.7
2000
0.01 0.03 0.030 0.04 0.11 0.020 30 0.02 0.8
1999
0.01 0.03   0.05 0.08 0.017 20 0.02  
1998
0.01 0.03   0.05 0.05 0.015 15 0.02  
1997
0.01 0.02 0.024 0.04 0.04 0.010 29 0.02 0.6
1996
0.01 0.02 0.025 0.05 0.07 0.016 31 0.02 0.7
1995
0.01 0.01 0.023 0.05 0.07 0.018 30 0.02 0.6
1994
0.01 0.01 0.016 0.04 0.05 0.012 31 0.02 0.4
1993
0.01 0.01 0.018 0.03 0.05 0.011 30 0.02 0.5
1992
0.01 0.01 0.016 0.03 0.04 0.009 30 0.02 0.4
1991
0.01 0.01 0.026 0.05 0.20 0.037 29 0.02 0.7
1990
0.01 0.01   0.03 0.04 0.011 24 0.02  
1989
            0    
Notes:  Values below the Limit of Detection (LoD) assumed to be ½ LoD.
Means and risks shown only for years with data in all 12 months.
Risks shown only for those substances with unit risk factors.