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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
0.75 9.2 * 31.3 36 11.3 12 1.5
2011
1.9 8.1 14.7 32 75 15.7 31 1.5
2010
0.75 4.3 * 19.2 25 6.78 25 1.5
2009
0.75 11 12.0 21.1 42 9.27 30 1.5
2008
1.3 12 23.9 47 130 25.6 31 1.0
2007
0.75 12 13.7 24.1 54 11.3 30 1.5
2006
* * * * * * 0 *
2005
* * * * * * 0 *
2004
* * * * * * 0 *
2003
3.0 * * * 11 3.36 5 1.0
2002
3.0 20 23.8 42 54 14.3 31 1.0
2001
1 13 19.5 42.9 61 17.7 32 2.0
2000
1 14 18.2 40 53 14.7 31 2.0
1999
1 15 23.0 59.1 80 20.9 30 2.0
1998
1 8.0 14.9 36.3 59 15.1 32 2.0
1997
1 12.5 16.6 33 78 15.1 30 2.0
1996
1 15 19.9 40.2 69 17.4 29 2.0
1995
1 17 20.1 39.4 56 15.8 29 2.0
1994
1 19.5 22.8 46.8 74 19.3 30 2.0
1993
1 20 19.6 49.2 78 18.0 29 2.0
1992
1 18.5 * 66.5 72 25.2 16 2.0
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.