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Annual Toxics Summary		 ARB's ADAM Air Quality Database
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Methyl Chloroform
parts per billion
Year Months
Present		 Minimum Median Mean 90th
Percentile		 Maximum Standard
Deviation		 Number of
Observations		 Detection
Limit
2024
* * * * * * 0 *
2023
* * * * * * 0 *
2022
* * * * * * 0 *
2021
0.005 0.005 * 0.005 0.005 0.000 18 0.01
2020
0.005 * * * 0.005 0.000 7 0.01
2019
0.005 0.005 0.005 0.005 0.005 0.000 29 0.01
2018
0.005 0.005 0.005 0.005 0.005 0.000 30 0.01
2017
0.005 0.005 0.005 0.005 0.005 0.000 28 0.01
2016
0.005 0.005 0.011 0.03 0.08 0.015 31 0.01
2015
0.005 0.005 0.005 0.005 0.01 0.002 30 0.01
2014
0.005 0.005 0.006 0.005 0.01 0.001 30 0.01
2013
0.005 0.005 0.005 0.005 0.005 0.000 30 0.01
2012
0.005 0.005 0.005 0.005 0.01 0.001 30 0.01
2011
0.005 0.005 0.006 0.005 0.01 0.002 30 0.01
2010
0.005 0.005 0.007 0.01 0.01 0.003 30 0.01
2009
0.005 0.01 0.009 0.01 0.01 0.002 31 0.01
2008
0.01 0.01 0.012 0.02 0.03 0.005 31 0.01
2007
0.01 0.01 0.014 0.02 0.03 0.006 30 0.01
2006
0.02 0.02 0.020 0.02 0.02 0.000 30 0.01
2005
0.02 0.02 0.020 0.02 0.02 0.000 31 0.01
2004
0.02 0.03 0.027 0.03 0.05 0.007 30 0.01
2003
0.03 0.03 0.031 0.04 0.04 0.003 30 0.01
2002
0.03 0.04 0.038 0.04 0.05 0.005 28 0.01
2001
0.03 0.04 0.039 0.05 0.06 0.007 31 0.01
2000
0.04 0.05 0.063 0.10 0.11 0.021 31 0.01
1999
0.05 0.05 * 0.08 0.09 0.014 16 0.01
1998
0.03 0.05 * 0.07 0.12 0.019 26 0.01
1997
0.05 0.08 0.125 0.14 1.1 0.234 28 0.01
1996
0.07 0.09 0.190 0.25 1.5 0.284 31 0.01
1995
0.10 0.17 0.414 0.54 5.5 1.00 30 0.01
1994
0.05 0.16 0.267 0.36 2.7 0.465 31 0.01
1993
0.14 0.32 * 0.68 1.1 0.224 33 0.01
1992
0.37 0.56 0.665 1.03 2.7 0.443 28 0.01
1991
0.32 0.92 1.04 1.6 2.7 0.500 29 0.01
1990
0.18 0.54 0.845 0.90 15 2.65 30 0.01
1989
0.17 0.54 * 0.87 1.1 0.253 20 0.01
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.