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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
3.4 7.0 * 11 25 4.90 17 2.86
2022
2.9 8.8 14.6 23.9 91.8 16.8 31 2.86
2021
1.43 8.0 * 16.9 38.6 7.59 23 2.86
2020
10.1 * * * 46 13.4 9 2.86
2019
3.0 15.8 22.8 47.5 85.9 18.8 29 2.86
2018
5.2 18.6 * 61.2 94.3 21.8 25 2.86
2017
6.8 19.7 29.2 59.1 62.4 18.5 28 2.86
2016
7.4 21.9 28.6 67 122 25.2 30 2.86
2015
3.6 18.8 23.4 45 66.8 14.9 30 2.86
2014
3.05 19 21.4 31.1 92 18.7 30 6.1
2013
1.7 20 * 46.6 53 16.1 28 1.5
2012
0.75 11 * 25.9 42 9.93 20 1.5
2011
0.75 9.9 * 19.6 35 8.42 19 1.5
2010
3.3 11 * 29 55 11.4 23 1.5
2009
4.5 11 * 29.5 34 9.01 26 1.5
2008
* * * * * * 0 *
2007
5.6 13.5 17.9 39 66 14.2 28 1.5
2006
* * * * * * 0 *
2005
* * * * * * 0 *
2004
* * * * * * 0 *
2003
20 * * * 48 9.80 6 1.0
2002
6.0 18.5 35.7 45.1 430 75.8 30 1.0
2001
7.0 20 21.7 40 56 12.1 31 2.0
2000
9.0 20 * 44.4 87 19.6 19 2.0
1999
1 13 * 31.7 40 9.82 20 2.0
1998
7.0 18 21.7 38.5 44 12.0 26 2.0
1997
5.0 24 28.1 51.2 90 19.3 28 2.0
1996
1 19 28.3 38.5 230 43.4 26 2.0
1995
5.0 24 33.5 63.8 160 32.7 30 2.0
1994
6.0 18.5 24.8 49.8 65 17.1 30 2.0
1993
6.0 21 32.3 59.6 91 20.8 27 2.0
1992
9.0 17.5 * 37.5 51 12.1 16 2.0
1991
5.0 16 * 37.8 73 15.2 25 2.0
1990
3.0 22.5 * 43.6 47 15.0 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.