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Read About Estimated Risk |
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Year | Months Present |
Minimum | Median | Mean | 90th Percentile |
Maximum | Standard Deviation |
Number of Observations |
Detection Limit |
Estimated Risk |
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2024 |
|
* | * | * | * | * | * | 0 | * | * | ||||||||||||
2023 |
|
* | * | * | * | * | * | 0 | * | * | ||||||||||||
2022 |
|
* | * | * | * | * | * | 0 | * | * | ||||||||||||
2021 |
|
* | * | * | * | * | * | 0 | * | * | ||||||||||||
2020 |
|
* | * | * | * | * | * | 0 | * | * | ||||||||||||
2019 |
|
* | * | * | * | * | * | 0 | * | * | ||||||||||||
2018 |
|
* | * | * | * | * | * | 0 | * | * | ||||||||||||
2017 |
|
* | * | * | * | * | * | 0 | * | * | ||||||||||||
2016 |
|
* | * | * | * | * | * | 0 | * | * | ||||||||||||
2015 |
|
* | * | * | * | * | * | 0 | * | * | ||||||||||||
2014 |
|
0.05 | 0.8 | * | 3.1 | 3.8 | 1.15 | 15 | 0.1 | * | ||||||||||||
2013 |
|
0.3 | 1.3 | 1.45 | 2.4 | 4.4 | 0.81 | 30 | 0.1 | 21 | ||||||||||||
2012 |
|
0.2 | 1.1 | 1.28 | 2.2 | 3.0 | 0.69 | 29 | 0.1 | 19 | ||||||||||||
2011 |
|
0.1 | 1.1 | 1.19 | 2.0 | 3.5 | 0.77 | 27 | 0.1 | 17 | ||||||||||||
2010 |
|
0.2 | 1.2 | 1.46 | 2.5 | 3.2 | 0.71 | 29 | 0.1 | 21 | ||||||||||||
2009 |
|
0.4 | 1.2 | 1.31 | 2.3 | 3.1 | 0.72 | 31 | 0.1 | 19 | ||||||||||||
2008 |
|
0.4 | 1.3 | 1.44 | 2.5 | 2.7 | 0.65 | 30 | 0.1 | 21 | ||||||||||||
2007 |
|
0.3 | 1.3 | 1.59 | 2.9 | 3.5 | 0.90 | 30 | 0.1 | 23 | ||||||||||||
2006 |
|
0.5 | 1.9 | 1.74 | 2.6 | 4.0 | 0.82 | 30 | 0.1 | 26 | ||||||||||||
2005 |
|
0.2 | 2.1 | 2.15 | 3.6 | 5.0 | 1.22 | 32 | 0.1 | 32 | ||||||||||||
2004 |
|
0.6 | 1.6 | 1.77 | 2.5 | 3.8 | 0.74 | 30 | 0.1 | 26 | ||||||||||||
2003 |
|
0.4 | 2.2 | * | 3.1 | 4.1 | 1.01 | 27 | 0.1 | * | ||||||||||||
2002 |
|
0.3 | 1.7 | 1.96 | 3.2 | 3.8 | 0.89 | 31 | 0.1 | 29 | ||||||||||||
2001 |
|
0.4 | 1.9 | 1.93 | 2.8 | 4.6 | 0.95 | 27 | 0.1 | 28 | ||||||||||||
2000 |
|
0.3 | 1.6 | 1.70 | 2.6 | 3.7 | 0.74 | 31 | 0.1 | 25 | ||||||||||||
1999 |
|
0.5 | 2.4 | 2.70 | 4.9 | 6.0 | 1.46 | 28 | 0.1 | 40 | ||||||||||||
1998 |
|
0.4 | 2.0 | 1.94 | 3.1 | 4.9 | 1.01 | 30 | 0.1 | 29 | ||||||||||||
1997 |
|
0.6 | 2.3 | * | 3.6 | 4.4 | 1.08 | 28 | 0.1 | * | ||||||||||||
1996 |
|
0.6 | 2.3 | * | 4.3 | 4.6 | 1.17 | 24 | 0.1 | * | ||||||||||||
1995 |
|
0.05 | 0.4 | 0.79 | 2.3 | 3.2 | 0.91 | 29 | 0.1 | 12 | ||||||||||||
1994 |
|
0.2 | 2.2 | 2.46 | 4.1 | 7.6 | 1.61 | 29 | 0.1 | 36 | ||||||||||||
1993 |
|
0.7 | 2.9 | 3.06 | 5.0 | 6.1 | 1.51 | 32 | 0.1 | 45 | ||||||||||||
1992 |
|
0.9 | 3.1 | * | 4.9 | 7.3 | 1.45 | 26 | 0.1 | * | ||||||||||||
1991 |
|
0.6 | 3.9 | 3.89 | 7.0 | 8.8 | 2.28 | 30 | 0.1 | 57 | ||||||||||||
1990 |
|
0.2 | 2.8 | 3.16 | 5.2 | 8.3 | 1.83 | 31 | 0.1 | 46 | ||||||||||||
1989 |
|
1.7 | 3.8 | * | 5.6 | 13 | 2.40 | 20 | 0.1 | * | ||||||||||||
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1989-1995 data and 1996-2024 data represent different methods and should not be compared. | |||
See Report on a Parallel Carbonyl Monitoring Study Using C18 and Silica Gel Sampling Media for details. | |||
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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. |
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