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Read About Estimated Risk |
Year | Months Present |
Minimum | Median | Mean | 90th Percentile |
Maximum | Standard Deviation |
Number of Observations |
Detection Limit |
Estimated Risk |
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2023 | * | * | * | * | * | * | 0 | * | * | |||||||||||||
2022 | * | * | * | * | * | * | 0 | * | * | |||||||||||||
2021 | * | * | * | * | * | * | 0 | * | * | |||||||||||||
2020 | * | * | * | * | * | * | 0 | * | * | |||||||||||||
2019 | * | * | * | * | * | * | 0 | * | * | |||||||||||||
2018 | * | * | * | * | * | * | 0 | * | * | |||||||||||||
2017 | * | * | * | * | * | * | 0 | * | * | |||||||||||||
2016 | * | * | * | * | * | * | 0 | * | * | |||||||||||||
2015 | * | * | * | * | * | * | 0 | * | * | |||||||||||||
2014 | * | * | * | * | * | * | 0 | * | * | |||||||||||||
2013 | * | * | * | * | * | * | 0 | * | * | |||||||||||||
2012 | * | * | * | * | * | * | 0 | * | * | |||||||||||||
2011 | 0.6 | 2.7 | 3.34 | 5.8 | 11 | 2.26 | 31 | 0.1 | 70 | |||||||||||||
2010 | 0.3 | 2.5 | 3.01 | 5.7 | 9.7 | 2.23 | 29 | 0.1 | 63 | |||||||||||||
2009 | 0.05 | 1.8 | 2.56 | 5.2 | 7.5 | 1.89 | 31 | 0.1 | 54 | |||||||||||||
2008 | 0.7 | 2.9 | 3.13 | 5.1 | 6.8 | 1.65 | 30 | 0.1 | 66 | |||||||||||||
2007 | 0.6 | 2.8 | 2.88 | 4.8 | 7.9 | 1.53 | 30 | 0.1 | 61 | |||||||||||||
2006 | 0.6 | 3.2 | 3.41 | 5.5 | 8.8 | 1.90 | 31 | 0.1 | 72 | |||||||||||||
2005 | 0.7 | 2.5 | 3.00 | 6.0 | 6.9 | 1.88 | 33 | 0.1 | 63 | |||||||||||||
2004 | 1.0 | 2.2 | 2.57 | 3.9 | 5.0 | 1.15 | 31 | 0.1 | 54 | |||||||||||||
2003 | 0.7 | 3.9 | 3.72 | 6.0 | 8.0 | 1.94 | 33 | 0.1 | 78 | |||||||||||||
2002 | 1.1 | 3.5 | 4.16 | 5.6 | 18 | 3.20 | 32 | 0.1 | 87 | |||||||||||||
2001 | 1.2 | 3.3 | 4.32 | 5.4 | 26 | 4.43 | 30 | 0.1 | 91 | |||||||||||||
2000 | 0.9 | 2.6 | 3.56 | 6.4 | 7.9 | 1.92 | 28 | 0.1 | 75 | |||||||||||||
1999 | 0.05 | 3.6 | * | 7.2 | 8.8 | 2.26 | 24 | 0.1 | * | |||||||||||||
1998 | 0.05 | 3.4 | 3.42 | 5.9 | 7.2 | 1.91 | 27 | 0.1 | 72 | |||||||||||||
1997 | 0.9 | 3.6 | * | 5.6 | 6.4 | 1.47 | 18 | 0.1 | * | |||||||||||||
1996 | 0.5 | 3.4 | * | 7.8 | 8.4 | 2.26 | 22 | 0.1 | * | |||||||||||||
1995 | 0.4 | 2.3 | 2.41 | 4.1 | 8.3 | 1.79 | 31 | 0.1 | 51 | |||||||||||||
1994 | 0.2 | 1.8 | 2.01 | 4.0 | 7.4 | 1.61 | 31 | 0.1 | 42 | |||||||||||||
1993 | 0.6 | 1.3 | 1.64 | 3.4 | 4.5 | 1.16 | 26 | 0.1 | 35 | |||||||||||||
1992 | 0.5 | 1.5 | * | 4.3 | 5.3 | 1.57 | 21 | 0.1 | * | |||||||||||||
1991 | 0.4 | 1.9 | 2.32 | 4.9 | 7.7 | 1.88 | 27 | 0.1 | 49 | |||||||||||||
1990 | 0.05 | 1.3 | * | 5.4 | 9.0 | 2.32 | 23 | 0.1 | * | |||||||||||||
1989 | * | * | * | * | * | * | 0 | * | * | |||||||||||||
1989-1995 data and 1996-2023 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. | |||
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. |