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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 | * | * | ||||||||||||
2013 |
|
0.9 | 1.8 | * | 3.1 | 3.8 | 0.77 | 22 | 0.1 | * | ||||||||||||
2012 |
|
0.7 | 2.3 | 2.32 | 3.7 | 5.3 | 1.05 | 30 | 0.1 | 49 | ||||||||||||
2011 |
|
1.6 | 2.2 | * | 3.3 | 3.8 | 0.65 | 15 | 0.1 | * | ||||||||||||
2010 |
|
0.8 | * | * | * | 3.2 | 1.12 | 4 | 0.1 | * | ||||||||||||
2009 |
|
0.4 | 2.1 | * | 3.7 | 4.7 | 1.13 | 28 | 0.1 | * | ||||||||||||
2008 |
|
0.8 | 2.5 | 2.37 | 3.5 | 4.2 | 0.97 | 30 | 0.1 | 50 | ||||||||||||
2007 |
|
0.9 | 2.0 | 2.33 | 3.5 | 4.6 | 0.93 | 30 | 0.1 | 49 | ||||||||||||
2006 |
|
0.9 | 2.2 | 2.41 | 3.7 | 7.3 | 1.30 | 29 | 0.1 | 51 | ||||||||||||
2005 |
|
0.4 | 2.7 | 2.91 | 4.1 | 6.1 | 1.21 | 29 | 0.1 | 61 | ||||||||||||
2004 |
|
1.1 | 2.6 | 2.78 | 4.3 | 5.8 | 1.11 | 29 | 0.1 | 58 | ||||||||||||
2003 |
|
1.5 | 2.6 | 2.79 | 3.8 | 6.0 | 1.06 | 30 | 0.1 | 59 | ||||||||||||
2002 |
|
0.4 | 2.9 | * | 6.0 | 7.6 | 1.78 | 27 | 0.1 | * | ||||||||||||
2001 |
|
1.0 | 2.9 | 2.96 | 4.4 | 8.4 | 1.50 | 30 | 0.1 | 62 | ||||||||||||
2000 |
|
1.0 | 2.8 | 2.88 | 4.4 | 6.2 | 1.32 | 29 | 0.1 | 61 | ||||||||||||
1999 |
|
0.4 | 2.2 | * | 4.9 | 6.8 | 1.67 | 23 | 0.1 | * | ||||||||||||
1998 |
|
0.5 | 2.6 | * | 4.9 | 6.2 | 1.53 | 29 | 0.1 | * | ||||||||||||
1997 |
|
1.1 | 3.4 | 3.68 | 5.4 | 7.0 | 1.42 | 30 | 0.1 | 77 | ||||||||||||
1996 |
|
1.2 | 3.3 | * | 5.1 | 7.3 | 1.29 | 24 | 0.1 | * | ||||||||||||
1995 |
|
0.5 | 2.9 | 3.29 | 6.1 | 9.6 | 2.00 | 31 | 0.1 | 69 | ||||||||||||
1994 |
|
1.1 | 2.4 | 3.06 | 5.7 | 7.6 | 1.64 | 27 | 0.1 | 64 | ||||||||||||
1993 |
|
0.6 | 2.6 | 3.22 | 5.2 | 7.7 | 1.70 | 28 | 0.1 | 68 | ||||||||||||
1992 |
|
0.05 | 2.4 | * | 4.8 | 7.5 | 1.84 | 18 | 0.1 | * | ||||||||||||
1991 |
|
0.7 | 2.1 | 2.76 | 5.0 | 9.6 | 2.01 | 29 | 0.1 | 58 | ||||||||||||
1990 |
|
0.2 | 2.3 | 2.97 | 6.8 | 11 | 2.56 | 31 | 0.1 | 62 | ||||||||||||
1989 |
|
0.2 | 2.7 | 3.58 | 7.9 | 15 | 3.07 | 50 | 0.1 | 75 | ||||||||||||
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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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