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Copper
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 16 * 47.8 57 16.1 23 1.5
2010
3.2 15 * 38 44 12.8 22 1.5
2009
4.5 12 * 30.6 65 13.4 28 1.5
2008
* * * * * * 0 *
2007
6.3 16.5 * 43 140 26.8 26 1.5
2006
* * * * * * 0 *
2005
* * * * * * 0 *
2004
* * * * * * 0 *
2003
7.0 * * * 63 20.8 7 1.0
2002
4.0 26 31.0 57.6 88 21.3 29 1.0
2001
3.0 8.5 15.6 31.3 51 12.2 32 2.0
2000
4.0 21 25.3 42 75 17.3 29 2.0
1999
2.0 16 * 56 89 21.5 25 2.0
1998
4.0 15 26.7 65 120 30.8 26 2.0
1997
2.0 15.5 19.3 39.1 43 12.3 30 2.0
1996
2.0 11 14.3 28.8 61 13.6 29 2.0
1995
1 12 19.1 33 75 16.4 31 2.0
1994
5.0 13 * 25.2 70 14.9 25 2.0
1993
5.0 19 27.3 39.4 210 36.8 29 2.0
1992
10 22 29.0 41 130 21.2 31 2.0
1991
4.0 13 * 37.6 120 23.7 25 2.0
1990
7.0 22.5 * 35 87 18.6 16 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.