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Trichloroethylene
parts per billion
Read About Estimated Risk
Year Months
Present
Minimum Median Mean 90th
Percentile
Maximum Standard
Deviation
Number of
Observations
Detection
Limit
Estimated
Risk
2023
* * * * * * 0 * *
2022
* * * * * * 0 * *
2021
0.01 0.01 * 0.01 0.01 0.000 18 0.02 *
2020
0.01 * * * 0.01 0.000 7 0.02 *
2019
0.01 0.01 0.010 0.01 0.01 0.000 29 0.02 0.3
2018
0.01 0.01 0.010 0.01 0.01 0.000 30 0.02 0.3
2017
0.01 0.01 0.010 0.01 0.01 0.000 28 0.02 0.3
2016
0.01 0.01 0.014 0.03 0.07 0.013 30 0.02 0.4
2015
0.01 0.01 0.010 0.01 0.01 0.000 30 0.02 0.3
2014
0.01 0.01 0.010 0.01 0.03 0.003 32 0.02 0.3
2013
0.01 0.01 0.010 0.01 0.01 0.000 30 0.02 0.3
2012
0.01 0.01 0.014 0.01 0.07 0.013 30 0.02 0.4
2011
0.01 0.01 0.010 0.01 0.01 0.000 30 0.02 0.3
2010
0.01 0.01 0.010 0.01 0.01 0.000 30 0.02 0.3
2009
0.01 0.01 0.011 0.01 0.04 0.005 31 0.02 0.3
2008
0.01 0.01 0.055 0.01 1.1 0.196 31 0.02 2
2007
0.01 0.01 0.010 0.01 0.01 0.000 30 0.02 0.3
2006
0.01 0.01 0.010 0.01 0.01 0.000 30 0.02 0.3
2005
0.01 0.01 0.013 0.01 0.09 0.015 31 0.02 0.4
2004
0.01 0.01 0.010 0.01 0.01 0.000 30 0.02 0.3
2003
0.01 0.01 0.014 0.01 0.09 0.015 30 0.02 0.4
2002
0.01 0.01 0.011 0.01 0.03 0.004 28 0.02 0.3
2001
0.01 0.01 0.011 0.01 0.03 0.004 31 0.02 0.3
2000
0.01 0.01 0.015 0.03 0.04 0.009 31 0.02 0.5
1999
0.01 0.01 * 0.03 0.03 0.007 24 0.02 *
1998
0.01 0.01 0.013 0.02 0.04 0.008 29 0.02 0.4
1997
0.01 0.01 0.012 0.01 0.03 0.004 28 0.02 0.4
1996
0.01 0.01 0.010 0.01 0.01 0.000 31 0.02 0.3
1995
0.01 0.01 0.013 0.03 0.04 0.009 30 0.02 0.4
1994
0.01 0.01 0.011 0.01 0.04 0.006 31 0.02 0.3
1993
0.01 0.01 * 0.03 0.07 0.014 33 0.02 *
1992
0.01 0.03 0.029 0.06 0.14 0.028 28 0.02 0.9
1991
0.01 0.03 0.026 0.05 0.06 0.015 28 0.02 0.8
1990
0.01 0.03 0.026 0.04 0.07 0.015 30 0.02 0.8
1989
0.01 0.03 0.034 0.06 0.08 0.020 23 0.02 1
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.