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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 | 0.0215 | 0.0215 | * | 0.06 | 0.09 | 0.021 | 16 | 0.043 | * | |||||||||||||
2022 | 0.0215 | 0.0215 | 0.056 | 0.1 | 0.4 | 0.07 | 31 | 0.043 | 23 | |||||||||||||
2021 | 0.0215 | 0.0215 | * | 0.08 | 0.09 | 0.026 | 22 | 0.043 | * | |||||||||||||
2020 | 0.0215 | * | * | * | 0.0215 | 0.00 | 8 | 0.043 | * | |||||||||||||
2019 | 0.0215 | 0.0215 | 0.025 | 0.0215 | 0.06 | 0.008 | 29 | 0.043 | 10 | |||||||||||||
2018 | 0.03 | 0.01 | * | 0.07 | 0.08 | 0.021 | 22 | 0.02 | * | |||||||||||||
2017 | 0.03 | 0.03 | 0.063 | 0.13 | 0.22 | 0.05 | 30 | 0.06 | 26 | |||||||||||||
2016 | 0.03 | * | 0.03 | * | 0.03 | * | 26 | 0.06 | 12 | |||||||||||||
2015 | 0.03 | * | 0.04 | * | 0.07 | * | 28 | 0.06 | 17 | |||||||||||||
2014 | 0.03 | * | 0.03 | * | 0.03 | * | 28 | 0.06 | 12 | |||||||||||||
2013 | 0.03 | * | 0.03 | * | 0.03 | * | 28 | 0.06 | 12 | |||||||||||||
2012 | 0.03 | * | 0.03 | * | 0.03 | * | 27 | 0.06 | 12 | |||||||||||||
2011 | 0.03 | * | 0.03 | * | 0.03 | * | 28 | 0.06 | 12 | |||||||||||||
2010 | 0.03 | * | 0.03 | * | 0.03 | * | 27 | 0.06 | 12 | |||||||||||||
2009 | 0.03 | * | 0.03 | * | 0.03 | * | 28 | 0.06 | 12 | |||||||||||||
2008 | 0.03 | * | 0.038 | * | 0.06 | * | 28 | 0.06 | 16 | |||||||||||||
2007 | 0.03 | * | 0.03 | * | 0.03 | * | 28 | 0.06 | 12 | |||||||||||||
2006 | 0.03 | * | 0.045 | * | 0.09 | * | 27 | 0.06 | 19 | |||||||||||||
2005 | 0.03 | * | 0.05 | * | 0.08 | * | 26 | 0.06 | 21 | |||||||||||||
2004 | 0.03 | * | 0.038 | * | 0.06 | * | 27 | 0.06 | 16 | |||||||||||||
2003 | 0.03 | * | 0.06 | * | 0.08 | * | 26 | 0.06 | 25 | |||||||||||||
2002 | 0.03 | * | 0.063 | * | 0.09 | * | 28 | 0.06 | 26 | |||||||||||||
2001 | 0.1 | 0.1 | * | 0.1 | 0.2 | 0.02 | 25 | 0.2 | * | |||||||||||||
2000 | 0.1 | 0.1 | 0.10 | 0.1 | 0.1 | 0.00 | 30 | 0.2 | 42 | |||||||||||||
1999 | 0.1 | 0.1 | * | 0.1 | 0.1 | 0.00 | 27 | 0.2 | * | |||||||||||||
1998 | 0.1 | 0.1 | 0.10 | 0.1 | 0.1 | 0.00 | 32 | 0.2 | 42 | |||||||||||||
1997 | 0.1 | 0.1 | 0.10 | 0.1 | 0.1 | 0.00 | 31 | 0.2 | 42 | |||||||||||||
1996 | 0.1 | 0.1 | 0.10 | 0.1 | 0.1 | 0.00 | 28 | 0.2 | 42 | |||||||||||||
1995 | 0.1 | 0.2 | 0.18 | 0.3 | 0.4 | 0.09 | 31 | 0.2 | 76 | |||||||||||||
1994 | 0.1 | 0.1 | * | 0.2 | 0.4 | 0.07 | 28 | 0.2 | * | |||||||||||||
1993 | 0.1 | 0.1 | 0.14 | 0.3 | 0.4 | 0.08 | 27 | 0.2 | 60 | |||||||||||||
1992 | 0.1 | 0.1 | * | 0.2 | 0.4 | 0.08 | 25 | 0.2 | * | |||||||||||||
1991 | 0.1 | 0.2 | * | 0.3 | 0.4 | 0.09 | 21 | 0.2 | * | |||||||||||||
1990 | * | * | * | * | * | * | 0 | * | * | |||||||||||||
1989 | * | * | * | * | * | * | 0 | * | * | |||||||||||||
2002 and later data based on quarterly composites; percentiles and standard deviation cannot be determined. | |||
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. |