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Annual Toxics Summary
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CFC-11
parts per billion
Year Months
Present
Minimum Median Mean 90th
Percentile
Maximum Standard
Deviation
Number of
Observations
Detection
Limit
2023
0.2 0.2 * 0.2 0.2 0.01 20 0.01
2022
0.2 0.2 0.20 0.2 0.2 0.01 30 0.01
2021
0.2 0.2 * 0.2 0.2 0.01 22 0.01
2020
0.2 * * * 0.3 0.01 9 0.01
2019
0.2 0.2 0.22 0.2 0.3 0.01 30 0.01
2018
0.2 0.2 0.23 0.2 0.3 0.01 31 0.01
2017
0.2 0.2 0.22 0.3 0.8 0.12 27 0.01
2016
* * * * * * 0 *
2015
* * * * * * 0 *
2014
* * * * * * 0 *
2013
* * * * * * 0 *
2012
* * * * * * 0 *
2011
* * * * * * 0 *
2010
* * * * * * 0 *
2009
* * * * * * 0 *
2008
* * * * * * 0 *
2007
* * * * * * 0 *
2006
* * * * * * 0 *
2005
* * * * * * 0 *
2004
* * * * * * 0 *
2003
* * * * * * 0 *
2002
* * * * * * 0 *
2001
* * * * * * 0 *
2000
* * * * * * 0 *
1999
* * * * * * 0 *
1998
* * * * * * 0 *
1997
* * * * * * 0 *
1996
* * * * * * 0 *
1995
* * * * * * 0 *
1994
* * * * * * 0 *
1993
* * * * * * 0 *
1992
* * * * * * 0 *
1991
* * * * * * 0 *
1990
* * * * * * 0 *
1989
* * * * * * 0 *
Graph It!
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.