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Annual Statewide Toxics Summary
Lead
FAQs
nanograms per cubic meter
Read About Estimated Risk
Year
Months
Present
Minimum
Median
Mean
90th
Percentile
Maximum
Standard
Deviation
Number of
Observations
Detection
Limit
Estimated
Risk
2023
0.65
2.8
*
5.3
56
5.20
246
1.3
*
2022
0.65
2.8
4.41
8.9
62.1
5.83
390
1.3
0.2
2021
0.65
2.1
*
7.9
444
25.4
312
1.3
*
2020
0.65
3.4
*
10.3
122
13.0
106
1.3
*
2019
0.65
2.9
4.49
8.6
72.8
6.73
410
1.3
0.2
2018
0.65
3.4
6.09
10.3
93.5
8.38
428
1.3
0.2
2017
0.65
3.5
*
10.5
91
9.43
379
1.3
*
2016
0.65
3.3
5.95
12.2
70.2
7.75
424
1.3
0.2
2015
0.65
3.1
6.37
11.5
181
12.6
418
1.3
0.2
2014
0.85
3.7
5.97
13
110
9.18
398
1.7
0.2
2013
0.5
3.6
*
11
110
9.89
417
1.0
*
2012
0.75
3.5
5.64
10
54
6.97
454
1.5
0.2
2011
0.75
4.2
*
11
59
6.54
301
1.5
*
2010
0.75
3.6
*
15
590
70.3
303
1.5
*
2009
0.75
5.2
7.10
13
130
8.48
516
1.5
0.2
2008
*
*
*
*
*
*
0
*
*
2007
0.75
7.3
10.9
21.2
110
12.2
329
1.5
0.4
2006
*
*
*
*
*
*
0
*
*
2005
*
*
*
*
*
*
0
*
*
2004
*
*
*
*
*
*
0
*
*
2003
1.5
6.5
*
16
100
12.0
86
3.0
*
2002
1.5
8.0
10.7
23
83
9.32
491
3.0
0.4
2001
2
7.0
11.0
22
150
14.2
505
4.0
0.4
2000
2
8.0
10.8
21
180
15.0
472
4.0
0.4
1999
2
6.0
10.8
22
570
28.1
565
4.0
0.4
1998
2
7.0
10.8
20
340
19.9
555
4.0
0.4
1997
2
7.0
10.2
24
68
10.0
557
4.0
0.3
1996
2
8.0
13.4
28
290
19.0
595
4.0
0.5
1995
2
8.5
12.8
31
110
14.2
602
4.0
0.4
1994
2
11
16.3
30
310
20.0
585
4.0
0.6
1993
2
12
16.8
33
250
16.6
576
4.0
0.6
1992
2
13
20.3
42.8
340
24.3
553
4.0
0.7
1991
2
26
35.2
68.4
230
29.8
567
4.0
1
1990
0.5
23.5
34.4
70
171
30.0
600
1.0
1
1989
0.5
29
37.5
75
228
30.2
1005
1.0
1
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.
