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California Air Resources Board

Annual Toxics Summary
ARB's ADAM Air Quality Database
Mexicali-Calzada Benito Juarez FAQs
Zirconium
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
0.75 * * * 0.75 0.00 2 1.5
2010
0.75 * * * 0.75 0.00 3 1.5
2009
0.75 * * * 0.75 0.00 1 1.5
2008
* * * * * * 0 *
2007
0.75 * * * 0.75 0.00 3 1.5
2006
* * * * * * 0 *
2005
* * * * * * 0 *
2004
* * * * * * 0 *
2003
* * * * * * 0 *
2002
* * * * * * 0 *
2001
4.0 10 * 25 26 8.02 19 2.0
2000
1 11 11.8 17.1 20 4.13 30 2.0
1999
3.0 11 12.2 19.2 34 6.88 30 2.0
1998
3.0 9.0 * 20.8 24 6.30 23 2.0
1997
1 * * * 38 10.5 9 2.0
1996
* * * * * * 0 *
1995
* * * * * * 0 *
1994
* * * * * * 0 *
1993
* * * * * * 0 *
1992
* * * * * * 0 *
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.