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California Air Resources Board

Annual Statewide Toxics Summary
ARB's ADAM Air Quality Database
Lead 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
2017
0.65 3.5 * 10.5 91 9.43 379 1.3 *
2016
0.65 3.3 5.95 12.2 70.2 7.75 424 1.3 0.2
2015
0.65 3.1 6.37 11.5 181 12.6 418 1.3 0.2
2014
0.85 3.7 5.97 13 110 9.18 398 1.7 0.2
2013
0.5 3.6 * 11 110 9.89 417 1.0 *
2012
0.75 3.5 5.64 10 54 6.97 454 1.5 0.2
2011
0.75 4.2 * 11 59 6.54 301 1.5 *
2010
0.75 3.6 * 15 590 70.3 303 1.5 *
2009
0.75 5.2 7.10 13 130 8.48 516 1.5 0.2
2008
* * * * * * 0 * *
2007
0.75 7.3 10.9 21.2 110 12.2 329 1.5 0.4
2006
* * * * * * 0 * *
2005
* * * * * * 0 * *
2004
* * * * * * 0 * *
2003
1.5 6.5 * 16 100 12.0 86 3.0 *
2002
1.5 8.0 10.7 23 83 9.32 491 3.0 0.4
2001
2 7.0 11.0 22 150 14.2 505 4.0 0.4
2000
2 8.0 10.8 21 180 15.0 472 4.0 0.4
1999
2 6.0 10.8 22 570 28.1 565 4.0 0.4
1998
2 7.0 10.8 20 340 19.9 555 4.0 0.4
1997
2 7.0 10.2 24 68 10.0 557 4.0 0.3
1996
2 8.0 13.4 28 290 19.0 595 4.0 0.5
1995
2 8.5 12.8 31 110 14.2 602 4.0 0.4
1994
2 11 16.3 30 310 20.0 585 4.0 0.6
1993
2 12 16.8 33 250 16.6 576 4.0 0.6
1992
2 13 20.3 42.8 340 24.3 553 4.0 0.7
1991
2 26 35.2 68.4 230 29.8 567 4.0 1
1990
0.5 23.5 34.4 70 171 30.0 600 1.0 1
1989
0.5 29 37.5 75 228 30.2 1005 1.0 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.