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California Air Resources Board

Annual Statewide Toxics Summary
ARB's ADAM Air Quality Database
Dibenz(a,h)anthracene-10 FAQs
nanograms per cubic meter
Read About New Estimated Risk
Year Months
Present
Minimum Median Mean 90th
Percentile
Maximum Standard
Deviation
Number of
Observations
Detection
Limit
Estimated
Risk
2005
0.025 0.025 * 0.08 0.37 0.055 60 0.05 *
2004
0.025 0.025 0.035 0.025 0.47 0.043 517 0.05 0.1
2003
0.025 0.025 0.038 0.06 0.58 0.052 497 0.05 0.1
2002
0.025 0.025 0.038 0.06 0.68 0.050 474 0.05 0.1
2001
0.025 0.025 0.039 0.07 0.82 0.063 486 0.05 0.1
2000
0.025 0.025 0.036 0.05 0.62 0.047 506 0.05 0.1
1999
0.025 0.025 0.038 0.06 0.73 0.055 592 0.05 0.1
1998
0.025 0.025 0.034 0.06 0.39 0.036 603 0.05 0.1
1997
0.025 0.025 0.033 0.025 0.52 0.036 575 0.05 0.1
1996
0.025 0.025 0.029 0.025 0.21 0.018 452 0.05 0.1
1995
0.025 0.025 0.030 0.025 0.21 0.022 448 0.05 0.1
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 0.2
1992
0.025 0.025 0.046 0.10 0.49 0.055 456 0.05 0.2
1991
0.025 0.025 0.068 0.17 1.0 0.108 451 0.05 0.2
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.
"*" means there was insufficient or no data available to determine the value.