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California Air Resources Board

Annual Toxics Summary
ARB's ADAM Air Quality Database
Modesto-I Street (Courthouse) FAQs
Manganese
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
2.0 10 * 30.7 44 11.6 20 2.0
1997
2.0 25.5 26.0 44.3 76 17.1 28 2.0
1996
2.0 17 21.2 35 65 16.9 31 2.0
1995
2.0 24 34.2 76.4 130 30.0 29 2.0
1994
1 24 25.3 44 85 18.7 31 2.0
1993
4.0 23 28.3 58.2 120 28.2 29 2.0
1992
4.0 25 28.8 54 71 18.5 31 2.0
1991
7.0 31.5 35.8 61.7 120 25.0 30 2.0
1990
6.0 29.5 * 73.9 130 31.4 20 1.0
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.