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California Air Resources Board

Annual Statewide Toxics Summary
ARB's ADAM Air Quality Database
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nanograms per cubic meter
Year Months
Present
Minimum Median Mean 90th
Percentile
Maximum Standard
Deviation
Number of
Observations
Detection
Limit
2017
1.345 44 60.7 140 278 52.5 420 2.69
2016
1.345 42 62.0 150 323 58.9 424 2.69
2015
1.345 41 58.7 130 537 58.2 418 2.69
2014
0.95 35 53.3 120 440 54.9 398 1.9
2013
3 34 * 100 250 39.2 431 1.5
2012
4.5 17 25.2 60 190 28.2 453 9
2011
4.5 15 22.8 49 200 24.2 412 9
2010
4.5 14 21.1 44 170 22.5 440 9
2009
4.5 15 23.0 54 160 22.8 520 9
2008
6 100 124 250 730 105 503 1
2007
4.5 25 34.2 75 290 31.4 492 9
2006
* * * * * * 0 *
2005
* * * * * * 0 *
2004
* * * * * * 0 *
2003
9 66 * 190 350 65.4 86 3
2002
1.5 110 140 270 680 103 491 3
2001
5 95 124 260 1500 114 505 10
2000
5 100 126 240 2900 171 472 10
1999
5 87 117 250 630 105 565 10
1998
5 69 92.7 200 630 86.6 561 10
1997
5 81 101 210 560 85.4 557 10
1996
5 79 102 220 750 89.4 595 10
1995
5 83 115 250 600 104 602 10
1994
5 87 108 220 490 84.0 585 10
1993
5 88 121 250 4200 199 575 10
1992
5 91 118 250 1800 120 554 10
1991
5 100 144 290 1700 134 567 10
1990
13 150 * 350 1100 137 309 10
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.