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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
2.9 15.1 * 66.9 85.9 23.3 21 2.86
2022
6.0 27.4 60.2 78.9 864 157 30 2.86
2021
5.4 24.4 * 60.4 71.2 19.7 24 2.86
2020
22.5 * * * 47.2 8.46 9 2.86
2019
14.3 40.6 49.1 95.7 159 34.7 34 2.86
2018
10.3 40.2 * 130 409 76.6 32 2.86
2017
6.7 40.7 60.6 100 235 52.4 33 2.86
2016
4.9 39.8 * 68.4 89.9 22.7 33 2.86
2015
1.43 36.2 49.4 110 228 46.6 33 2.86
2014
3.05 45.5 * 65 130 30.5 16 6.1
2013
14 30 * 71 120 28.6 21 1.5
2012
13 23.5 * 54.5 88 20.2 26 1.5
2011
5.0 40 * 87.8 200 40.9 25 1.5
2010
12 27 * 66.5 100 22.7 24 1.5
2009
9.4 31.5 * 61.9 93 20.1 24 1.5
2008
* * * * * * 0 *
2007
7.5 34 31.7 45 71 13.6 31 1.5
2006
* * * * * * 0 *
2005
* * * * * * 0 *
2004
* * * * * * 0 *
2003
11 * * * 59 17.2 5 1.0
2002
3.0 50 67.3 140 250 53.7 36 1.0
2001
1 38 41.3 67 150 27.7 39 2.0
2000
10 37.5 58.6 86.6 350 59.1 40 2.0
1999
11 52 72.5 130 310 63.4 39 2.0
1998
4.0 27 41.8 98.9 190 42.0 42 2.0
1997
6.0 22 33.7 62 140 28.4 34 2.0
1996
1 19 24.1 45.5 120 21.6 36 2.0
1995
4.0 30.5 31.3 52.3 110 21.2 30 2.0
1994
6.0 34 * 66.4 120 25.5 25 2.0
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.