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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 | 0.7 | 1.8 | * | 3.4 | 4.5 | 1.18 | 12 | 0.1 | * | |||||||||||||
2011 | 0.7 | 3.0 | 2.96 | 5.3 | 5.9 | 1.54 | 31 | 0.1 | 62 | |||||||||||||
2010 | 0.4 | 2.0 | 2.49 | 5.1 | 7.0 | 1.87 | 30 | 0.1 | 52 | |||||||||||||
2009 | 0.3 | 1.7 | 2.54 | 4.9 | 6.0 | 1.66 | 31 | 0.1 | 53 | |||||||||||||
2008 | 0.7 | 2.9 | 3.15 | 4.9 | 13 | 2.47 | 31 | 0.1 | 66 | |||||||||||||
2007 | 0.6 | 2.7 | 2.82 | 4.5 | 9.3 | 1.75 | 30 | 0.1 | 59 | |||||||||||||
2006 | 0.6 | 2.4 | 2.63 | 5.0 | 7.2 | 1.61 | 30 | 0.1 | 55 | |||||||||||||
2005 | 0.3 | 2.4 | 3.28 | 7.1 | 10 | 2.71 | 31 | 0.1 | 69 | |||||||||||||
2004 | 0.9 | 2.7 | 3.40 | 5.6 | 14 | 2.53 | 30 | 0.1 | 71 | |||||||||||||
2003 | 0.8 | 3.2 | 3.82 | 7.0 | 9.0 | 2.40 | 31 | 0.1 | 80 | |||||||||||||
2002 | 0.8 | 4.1 | 4.47 | 8.2 | 10 | 2.46 | 29 | 0.1 | 94 | |||||||||||||
2001 | 0.8 | 3.5 | 3.25 | 5.7 | 6.8 | 1.71 | 31 | 0.1 | 68 | |||||||||||||
2000 | 0.8 | 2.4 | 2.76 | 5.5 | 6.4 | 1.71 | 28 | 0.1 | 58 | |||||||||||||
1999 | 0.9 | 3.4 | 4.15 | 7.6 | 12 | 2.71 | 30 | 0.1 | 87 | |||||||||||||
1998 | 0.1 | 2.3 | 2.63 | 5.7 | 10 | 2.29 | 30 | 0.1 | 55 | |||||||||||||
1997 | 1.0 | 3.3 | 3.42 | 5.1 | 6.2 | 1.38 | 30 | 0.1 | 72 | |||||||||||||
1996 | 0.7 | 2.9 | 2.99 | 5.1 | 6.5 | 1.72 | 30 | 0.1 | 63 | |||||||||||||
1995 | 0.5 | 1.9 | 2.04 | 4.0 | 4.3 | 1.31 | 29 | 0.1 | 43 | |||||||||||||
1994 | 0.3 | 1.5 | 1.78 | 2.5 | 5.6 | 0.97 | 32 | 0.1 | 37 | |||||||||||||
1993 | 0.3 | 1.8 | 2.08 | 3.4 | 4.7 | 1.09 | 30 | 0.1 | 44 | |||||||||||||
1992 | 0.4 | 1.4 | * | 2.5 | 3.4 | 0.82 | 15 | 0.1 | * | |||||||||||||
1991 | * | * | * | * | * | * | 0 | * | * | |||||||||||||
1990 | * | * | * | * | * | * | 0 | * | * | |||||||||||||
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. |