Sites with silicon data available Available Substances Toxics Statistics Home Page Data Descriptions Page
California Home ARB: Home Search Site Map Contact Us
California Air Resources Board

Annual Toxics Summary
ARB's ADAM Air Quality Database
North Long Beach FAQs
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
1900 * * * 5600 1710 4 2
2002
1200 2800 * 4700 5600 1190 27 2
2001
600 2900 2950 5000 5700 1430 28 3
2000
1200 2800 * 4700 15000 2580 29 3
1999
1000 3000 3610 6700 14000 3010 26 3
1998
400 2300 2500 4000 6600 1390 29 3
1997
330 3500 3500 6000 7600 1960 30 3
1996
1200 3200 * 6100 15000 2900 23 3
1995
540 3300 3810 6500 8400 1950 29 3
1994
800 3300 3710 5500 7900 1720 29 3
1993
320 3500 3700 6100 11000 2250 30 3
1992
560 4000 3990 6700 8500 1820 30 3
1991
1400 3900 4450 6400 13000 2380 28 3
1990
1800 4800 * 13000 15000 3960 16 3
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.