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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
0.01 0.02 * 0.04 0.05 0.012 18 0.02 *
2022
0.01 0.02 0.023 0.03 0.04 0.010 31 0.02 2
2021
0.01 0.03 * 0.04 0.05 0.010 23 0.02 *
2020
0.01 * * * 0.04 0.011 9 0.02 *
2019
0.01 0.03 0.032 0.05 0.07 0.013 30 0.02 2
2018
0.02 0.03 0.035 0.05 0.07 0.012 31 0.02 3
2017
0.02 0.03 0.038 0.06 0.07 0.013 30 0.02 3
2016
0.03 0.05 * 0.06 0.07 0.014 13 0.02 *
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.