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Annual Toxics Summary
ARB's ADAM Air Quality Database
Modesto-I Street (Courthouse) 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 *
2010
* * * * * * 0 *
2009
* * * * * * 0 *
2008
* * * * * * 0 *
2007
* * * * * * 0 *
2006
* * * * * * 0 *
2005
* * * * * * 0 *
2004
* * * * * * 0 *
2003
* * * * * * 0 *
2002
* * * * * * 0 *
2001
* * * * * * 0 *
2000
* * * * * * 0 *
1999
* * * * * * 0 *
1998
1 1 * 5.0 6.0 1.73 20 2.0
1997
1 3.0 3.29 6.3 10 2.38 28 2.0
1996
1 3.0 3.28 5.0 12 2.27 31 2.0
1995
1 3.0 4.22 9.0 17 3.75 29 2.0
1994
1 3.0 3.42 7.0 11 2.66 31 2.0
1993
1 4.0 4.07 8.4 15 3.51 29 2.0
1992
1 3.0 3.57 7.0 9.0 2.41 31 2.0
1991
1 4.0 4.69 8.0 18 3.42 30 2.0
1990
1 5.5 * 9.4 18 4.13 14 2.0
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.