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Annual Toxics Summary
ARB's ADAM Air Quality Database
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Silicon
nanograms per cubic meter
Year Months
Present
Minimum Median Mean 90th
Percentile
Maximum Standard
Deviation
Number of
Observations
Detection
Limit
2023
* * * * * * 0 *
2022
* * * * * * 0 *
2021
* * * * * * 0 *
2020
* * * * * * 0 *
2019
* * * * * * 0 *
2018
* * * * * * 0 *
2017
* * * * * * 0 *
2016
* * * * * * 0 *
2015
* * * * * * 0 *
2014
* * * * * * 0 *
2013
* * * * * * 0 *
2012
* * * * * * 0 *
2011
* * * * * * 0 *
2010
* * * * * * 0 *
2009
* * * * * * 0 *
2008
* * * * * * 0 *
2007
* * * * * * 0 *
2006
* * * * * * 0 *
2005
* * * * * * 0 *
2004
* * * * * * 0 *
2003
550 * * * 2200 651 5 2
2002
330 4200 4330 7200 8000 2450 31 2
2001
170 2500 3710 8500 11000 3240 32 3
2000
94 2700 3410 7500 8900 2630 31 3
1999
270 3400 4420 9800 14000 3670 30 3
1998
200 1700 3090 8100 13000 3240 32 3
1997
95 2600 3280 6400 12000 2600 30 3
1996
120 2600 3540 7400 11000 3060 29 3
1995
53 3600 3710 7000 8500 2780 29 3
1994
140 3700 4240 9500 13000 3490 30 3
1993
140 3500 3650 8900 16000 3700 29 3
1992
140 3800 * 13000 13000 4600 16 3
1991
* * * * * * 0 *
1990
* * * * * * 0 *
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.