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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
0.01 0.03 * 0.04 0.05 0.011 11 0.02 *
2021
0.01 0.03 * 0.05 0.08 0.016 22 0.02 *
2020
0.03 * * * 0.05 0.009 5 0.02 *
2019
0.01 0.03 * 0.06 0.30 0.061 20 0.02 *
2018
0.02 0.03 * 0.07 0.10 0.023 20 0.02 *
2017
0.02 0.04 0.040 0.06 0.08 0.015 29 0.02 3
2016
0.02 0.04 0.046 0.06 0.16 0.026 31 0.02 3
2015
0.02 0.04 0.041 0.05 0.12 0.022 26 0.02 3
2014
0.02 0.03 * 0.06 0.07 0.015 23 0.02 *
2013
0.01 0.04 0.037 0.06 0.09 0.018 31 0.02 3
2012
0.01 0.03 0.037 0.06 0.07 0.015 29 0.02 3
2011
0.01 0.04 0.041 0.07 0.09 0.018 31 0.02 3
2010
0.01 0.03 0.034 0.06 0.07 0.015 29 0.02 3
2009
0.01 0.03 0.039 0.06 0.08 0.020 29 0.02 3
2008
0.02 0.04 0.040 0.07 0.08 0.017 29 0.02 3
2007
0.01 0.04 0.039 0.05 0.08 0.017 23 0.02 3
2006
0.01 0.04 * 0.07 0.33 0.061 25 0.02 *
2005
0.02 0.04 0.048 0.07 0.09 0.022 30 0.02 4
2004
0.03 0.04 0.046 0.06 0.08 0.015 24 0.02 3
2003
0.03 0.04 0.048 0.06 0.14 0.022 29 0.02 4
2002
0.02 0.03 * 0.07 0.09 0.020 23 0.02 *
2001
0.01 0.04 0.042 0.06 0.08 0.017 28 0.02 3
2000
0.01 0.04 0.044 0.07 0.10 0.021 29 0.02 3
1999
0.01 0.03 * 0.07 0.09 0.024 19 0.02 *
1998
0.01 0.04 0.044 0.07 0.08 0.019 28 0.02 3
1997
0.01 0.04 * 0.07 0.08 0.019 22 0.02 *
1996
0.02 0.05 0.053 0.07 0.12 0.021 28 0.02 4
1995
0.02 0.05 0.056 0.08 0.11 0.022 31 0.02 4
1994
0.01 0.04 0.038 0.06 0.10 0.022 30 0.02 3
1993
0.01 0.05 0.047 0.07 0.09 0.020 26 0.02 4
1992
0.01 0.03 0.035 0.06 0.07 0.020 31 0.02 3
1991
0.01 0.03 0.037 0.06 0.09 0.024 28 0.02 3
1990
0.01 0.03 0.032 0.05 0.12 0.021 29 0.02 2
1989
0.01 0.04 * 0.07 0.08 0.023 21 0.02 *
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.