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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 |
|
0.7 | 2.1 | * | 5.1 | 5.9 | 1.60 | 12 | 0.1 | * | ||||||||||||
2023 |
|
0.6 | 3.0 | * | 6.0 | 7.1 | 2.07 | 22 | 0.1 | * | ||||||||||||
2022 |
|
0.5 | 2.2 | 2.74 | 5.8 | 6.7 | 1.76 | 30 | 0.1 | 58 | ||||||||||||
2021 |
|
0.6 | 2.7 | * | 6.2 | 9.3 | 2.24 | 16 | 0.1 | * | ||||||||||||
2020 |
|
0.4 | * | * | * | 3.6 | 1.32 | 7 | 0.1 | * | ||||||||||||
2019 |
|
0.7 | 1.9 | 2.70 | 5.1 | 7.0 | 1.88 | 30 | 0.1 | 57 | ||||||||||||
2018 |
|
0.8 | 2.9 | 3.36 | 6.9 | 8.9 | 2.08 | 30 | 0.1 | 70 | ||||||||||||
2017 |
|
0.9 | 2.6 | 3.21 | 5.8 | 6.8 | 1.72 | 30 | 0.1 | 67 | ||||||||||||
2016 |
|
0.6 | 2.4 | 2.88 | 5.8 | 7.5 | 1.81 | 31 | 0.1 | 60 | ||||||||||||
2015 |
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1.0 | 2.7 | 2.98 | 4.7 | 7.8 | 1.50 | 29 | 0.1 | 62 | ||||||||||||
2014 |
|
0.6 | 2.3 | 2.57 | 4.2 | 4.8 | 1.26 | 30 | 0.1 | 54 | ||||||||||||
2013 |
|
1.0 | 2.5 | 2.84 | 4.3 | 7.5 | 1.44 | 31 | 0.1 | 60 | ||||||||||||
2012 |
|
0.5 | 1.9 | 2.52 | 5.1 | 9.5 | 1.97 | 30 | 0.1 | 53 | ||||||||||||
2011 |
|
0.4 | 1.5 | 1.83 | 3.0 | 6.4 | 1.43 | 31 | 0.1 | 39 | ||||||||||||
2010 |
|
0.2 | 1.7 | 2.34 | 3.9 | 7.7 | 1.88 | 30 | 0.1 | 49 | ||||||||||||
2009 |
|
0.3 | 1.9 | 2.28 | 4.7 | 6.4 | 1.64 | 30 | 0.1 | 48 | ||||||||||||
2008 |
|
0.4 | 1.7 | 2.25 | 4.3 | 6.3 | 1.55 | 33 | 0.1 | 47 | ||||||||||||
2007 |
|
0.8 | 2.2 | 2.46 | 3.8 | 8.9 | 1.56 | 29 | 0.1 | 52 | ||||||||||||
2006 |
|
0.5 | 2.1 | 2.45 | 3.9 | 9.6 | 1.72 | 29 | 0.1 | 51 | ||||||||||||
2005 |
|
0.6 | 1.6 | 2.07 | 4.0 | 4.8 | 1.26 | 30 | 0.1 | 43 | ||||||||||||
2004 |
|
0.9 | 1.8 | 2.12 | 3.7 | 6.1 | 1.14 | 29 | 0.1 | 44 | ||||||||||||
2003 |
|
0.4 | 2.6 | 3.23 | 6.5 | 9.3 | 2.19 | 31 | 0.1 | 68 | ||||||||||||
2002 |
|
0.9 | 3.1 | 3.12 | 5.3 | 6.3 | 1.46 | 25 | 0.1 | 66 | ||||||||||||
2001 |
|
0.05 | 0.8 | 1.57 | 3.8 | 11 | 2.36 | 27 | 0.1 | 33 | ||||||||||||
2000 |
|
0.6 | 2.0 | 2.25 | 3.8 | 5.5 | 1.15 | 28 | 0.1 | 47 | ||||||||||||
1999 |
|
1.0 | 2.4 | * | 6.1 | 9.4 | 2.05 | 27 | 0.1 | * | ||||||||||||
1998 |
|
0.8 | 1.9 | 2.42 | 4.6 | 9.2 | 1.96 | 29 | 0.1 | 51 | ||||||||||||
1997 |
|
0.5 | 2.3 | 2.42 | 4.0 | 4.6 | 0.96 | 30 | 0.1 | 51 | ||||||||||||
1996 |
|
0.2 | 2.0 | 2.52 | 4.7 | 5.4 | 1.55 | 31 | 0.1 | 53 | ||||||||||||
1995 |
|
0.3 | 1.6 | 1.78 | 3.0 | 5.1 | 1.09 | 29 | 0.1 | 37 | ||||||||||||
1994 |
|
0.6 | 1.6 | 1.71 | 2.6 | 3.2 | 0.67 | 30 | 0.1 | 36 | ||||||||||||
1993 |
|
0.5 | 1.5 | * | 2.7 | 3.1 | 0.77 | 23 | 0.1 | * | ||||||||||||
1992 |
|
* | * | * | * | * | * | 0 | * | * | ||||||||||||
1991 |
|
* | * | * | * | * | * | 0 | * | * | ||||||||||||
1990 |
|
* | * | * | * | * | * | 0 | * | * | ||||||||||||
1989 |
|
* | * | * | * | * | * | 0 | * | * | ||||||||||||
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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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