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HFC-125
parts per billion
Year Months
Present
Minimum Median Mean 90th
Percentile
Maximum Standard
Deviation
Number of
Observations
Detection
Limit
2023
* * * * * * 0 *
2022
0.1 0.5 * 1.2 1.9 0.52 11 0.2
2021
0.4 1.4 * 27.4 30 10.3 22 0.2
2020
0.6 * * * 15 5.76 5 0.2
2019
0.5 1.5 * 4.5 12 2.83 20 0.2
2018
0.1 0.6 * 1.6 5.7 1.30 17 0.2
2017
0.1 0.2 0.26 0.5 1.1 0.22 29 0.2
2016
0.1 0.4 1.74 3.9 17 3.57 30 0.2
2015
0.5 5.1 5.98 10.7 20 4.28 24 0.2
2014
0.1 1.9 * 21.2 52 14.4 24 0.2
2013
0.1 0.1 0.11 0.1 0.3 0.04 30 0.2
2012
0.1 0.1 0.14 0.1 0.7 0.14 29 0.2
2011
0.1 0.1 * 0.1 0.1 0.00 19 0.2
2010
0.1 0.1 * 0.1 0.1 0.00 25 0.2
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.