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Chloroform
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 * *
2020
* * * * * * 0 * *
2019
* * * * * * 0 * *
2018
* * * * * * 0 * *
2017
* * * * * * 0 * *
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
0.01 0.02 * 0.04 0.08 0.018 17 0.02 *
1998
0.02 0.05 * 0.06 0.08 0.015 23 0.02 *
1997
0.01 0.08 0.102 0.18 0.35 0.072 28 0.02 8
1996
0.01 0.04 0.046 0.06 0.12 0.022 30 0.02 4
1995
0.02 0.04 0.052 0.07 0.10 0.020 29 0.02 4
1994
0.01 0.03 0.029 0.05 0.10 0.019 30 0.02 2
1993
0.01 0.03 0.038 0.06 0.10 0.021 31 0.02 3
1992
0.01 0.04 0.037 0.06 0.07 0.017 28 0.02 3
1991
0.01 0.04 0.038 0.07 0.09 0.022 34 0.02 3
1990
0.01 0.03 0.030 0.04 0.06 0.014 25 0.02 2
1989
0.02 0.04 0.043 0.05 0.07 0.013 20 0.02 3
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.