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California Air Resources Board

Annual Statewide Toxics Summary
ARB's ADAM Air Quality Database
Chromium FAQs
nanograms per cubic meter
Year Months
Present
Minimum Median Mean 90th
Percentile
Maximum Standard
Deviation
Number of
Observations
Detection
Limit
2015
4.255 4.255 6.1 9 60 6.9 418 8.51
2014
3.4 3.4 5.0 9 33 4.0 398 6.8
2013
1.5 4 * 7 40 3.9 431 3
2012
1.5 4 4.2 7 22 2.6 454 3
2011
1.5 4 4.0 6 30 2.5 400 3
2010
1.5 3 3.5 6 44 2.8 440 3
2009
1.5 3 3.1 5 40 2.4 520 3
2008
* * * * * * 0 *
2007
1.5 4 4.1 7 25 2.8 455 3
2006
* * * * * * 0 *
2005
* * * * * * 0 *
2004
* * * * * * 0 *
2003
1 3 * 8 27 3.9 86 2
2002
1 4 5.5 10 66 6.5 491 2
2001
1 3 5.1 9 71 8.1 505 2
2000
1 4 4.9 9 40 5.1 472 2
1999
1 3 4.5 9 30 4.0 565 2
1998
1 3 3.9 8 20 3.3 561 2
1997
1 3 3.9 8 24 3.2 557 2
1996
1 3 3.9 8 32 3.3 595 2
1995
1 3 4.4 10 55 4.3 602 2
1994
1 4 4.5 9 40 3.9 585 2
1993
1 4 4.9 10 25 3.7 575 2
1992
1 3 4.5 10 50 4.6 554 2
1991
1 4 5.1 11 45 4.6 567 2
1990
0.5 4 4.6 9 37 3.9 600 1
1989
0.5 3 4.3 8 71 4.7 1005 1
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.