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California Air Resources Board

Annual Statewide Toxics Summary		 ARB's ADAM Air Quality Database
Dibenz(a,h)anthracene
nanograms per cubic meter
Year Months
Present		 Minimum Median Mean 90th
Percentile		 Maximum Standard
Deviation		 Number of
Observations		 Detection
Limit		 Estimated
Risk
2002
0.025 0.025 0.038 0.06 0.68 0.050 474 0.05 0.01
2001
0.025 0.025 0.039 0.07 0.82 0.063 486 0.05 0.02
2000
0.025 0.025 0.036 0.05 0.62 0.047 506 0.05 0.01
1999
0.025 0.025 0.038 0.06 0.73 0.055 592 0.05 0.01
1998
0.025 0.025 0.034 0.06 0.39 0.036 603 0.05 0.01
1997
0.025 0.025 0.033 0.025 0.52 0.036 575 0.05 0.01
1996
0.025 0.025 0.029 0.025 0.21 0.018 452 0.05 0.01
1995
0.025 0.025 0.030 0.025 0.21 0.022 448 0.05 0.01
1994
0.025 0.025   0.08 0.35 0.042 264 0.05  
1993
0.025 0.025 0.050 0.11 0.43 0.055 455 0.05 0.02
1992
0.025 0.025 0.046 0.10 0.49 0.055 456 0.05 0.02
1991
0.025 0.025 0.068 0.17 1.0 0.108 451 0.05 0.03
1990
0.025 0.09   0.46 6.6 0.630 152 0.05  
1989
            0    
Graph It!
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.