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Annual Statewide Toxics Summary
Manganese
FAQs
nanograms per cubic meter
Year
Months
Present
Minimum
Median
Mean
90th
Percentile
Maximum
Standard
Deviation
Number of
Observations
Detection
Limit
2023
0.65
14.1
*
38.2
179
17.9
246
1.3
2022
0.65
17.1
23.1
48.2
155
21.6
390
1.3
2021
0.65
18.8
*
68.9
179
28.5
312
1.3
2020
0.65
15
*
44.5
75.9
16.7
106
1.3
2019
0.65
13.9
22.4
56.6
115
23.3
410
1.3
2018
0.65
17.4
26.3
57.3
387
29.5
428
1.3
2017
0.65
18.6
24.3
53.1
129
21.3
420
1.3
2016
0.65
17.2
24.6
56.7
188
22.6
424
1.3
2015
0.65
17.5
24.3
53.5
182
22.6
418
1.3
2014
0.85
18
25.6
54
190
24.8
398
1.7
2013
0.5
18
*
51
130
20.3
431
1.0
2012
0.75
14
17.8
40
100
15.2
454
1.5
2011
0.75
13
15.9
36
81
14.0
441
1.5
2010
0.75
9.5
13.7
26
70
11.0
404
1.5
2009
0.75
13
16.1
34
89
13.1
520
1.5
2008
0.5
18
24.0
49
130
20.9
503
1.0
2007
0.75
17
21.5
42
120
17.2
492
1.5
2006
*
*
*
*
*
*
0
*
2005
*
*
*
*
*
*
0
*
2004
*
*
*
*
*
*
0
*
2003
2.0
15
*
36.5
88
15.1
86
1.0
2002
1.0
24
31.5
61
180
26.0
491
1.0
2001
1
19
27.6
56.6
170
26.3
505
2.0
2000
1
21
26.7
55
130
21.8
472
2.0
1999
1
18
26.4
58.6
200
25.9
565
2.0
1998
1
14
20.2
43
140
20.3
561
2.0
1997
1
16
20.0
39.4
99
16.3
557
2.0
1996
1
16
20.8
44.6
180
18.8
595
2.0
1995
1
17
23.8
51
160
22.5
602
2.0
1994
1
18
22.6
44.6
120
18.4
585
2.0
1993
1
19
24.1
50
130
21.6
575
2.0
1992
1
18
23.9
50
310
23.1
554
2.0
1991
1
22
30.3
62
260
26.0
567
2.0
1990
0.5
24
29.5
57
150
23.5
600
1.0
1989
0.5
22
27.3
54.6
162
22.4
1005
1.0
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.
