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Annual Statewide Toxics Summary
Copper
FAQs
nanograms per cubic meter
Year
Months
Present
Minimum
Median
Mean
90th
Percentile
Maximum
Standard
Deviation
Number of
Observations
Detection
Limit
2023
1.43
7.6
*
21.2
85.9
10.8
246
2.86
2022
1.43
10.7
19.7
36
864
52.0
390
2.86
2021
1.43
12.1
*
38.5
160
18.5
312
2.86
2020
1.43
21.3
*
46.1
70.5
16.0
106
2.86
2019
1.43
15.6
21.5
43.5
159
20.1
410
2.86
2018
1.43
18.7
*
53.7
409
33.4
358
2.86
2017
1.43
18.7
29.0
56.7
235
29.4
420
2.86
2016
1.43
20.8
26.5
51.1
271
22.8
424
2.86
2015
1.43
20.2
28.0
51.1
586
36.4
418
2.86
2014
3.05
19
26.6
53
240
28.3
398
6.1
2013
0.75
23
*
58
170
24.0
431
1.5
2012
0.75
16
*
38
350
22.5
346
1.5
2011
0.75
18
*
43
200
21.8
311
1.5
2010
2.2
16
19.9
38
100
13.9
346
1.5
2009
1.9
16
*
41
93
15.4
440
1.5
2008
*
*
*
*
*
*
0
*
2007
2.5
20
24.8
46.4
140
19.2
467
1.5
2006
*
*
*
*
*
*
0
*
2005
*
*
*
*
*
*
0
*
2004
*
*
*
*
*
*
0
*
2003
2.0
29.5
*
65.5
110
22.3
86
1.0
2002
1.0
25
34.2
72
430
33.6
491
1.0
2001
1
20
28.0
56
210
25.6
505
2.0
2000
1
21
29.8
58
350
31.0
472
2.0
1999
1
20
29.2
61
430
34.7
565
2.0
1998
1
22
32.8
74
250
32.5
561
2.0
1997
2.0
26
36.8
81
880
48.6
557
2.0
1996
1
23
35.0
68.2
930
48.8
595
2.0
1995
1
25
40.2
69
1500
82.7
602
2.0
1994
1
24
34.0
63
540
37.7
585
2.0
1993
4.0
27
34.9
66.6
210
25.6
575
2.0
1992
2.0
26
36.0
59
1000
64.4
554
2.0
1991
1
22
34.0
66
800
45.7
567
2.0
1990
1
25
*
55.2
240
25.9
309
2.0
1989
*
*
*
*
*
*
0
*
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.
