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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
2025
0.005 0.005 * 0.005 0.005 0.000 21 0.01
2024
0.005 0.005 0.005 0.005 0.005 0.000 30 0.01
2023
0.005 0.005 0.005 0.005 0.005 0.000 30 0.01
2022
0.005 0.005 0.005 0.005 0.005 0.000 31 0.01
2021
0.005 0.005 * 0.005 0.005 0.000 23 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 30 0.01
2018
0.005 0.005 0.005 0.005 0.005 0.000 31 0.01
2017
0.005 0.005 0.005 0.005 0.005 0.000 30 0.01
2016
0.005 0.005 0.008 0.005 0.06 0.011 31 0.01
2015
0.005 0.005 0.007 0.005 0.05 0.008 30 0.01
2014
0.005 0.005 0.005 0.005 0.005 0.000 29 0.01
2013
0.005 0.005 0.006 0.005 0.02 0.003 31 0.01
2012
0.005 0.005 0.005 0.005 0.005 0.000 30 0.01
2011
0.005 0.005 0.006 0.01 0.02 0.004 31 0.01
2010
0.005 0.005 0.006 0.01 0.01 0.002 29 0.01
2009
0.005 0.01 0.008 0.01 0.01 0.002 31 0.01
2008
0.005 0.01 0.010 0.01 0.01 0.001 31 0.01
2007
0.01 0.01 0.014 0.02 0.02 0.005 30 0.01
2006
0.01 0.02 0.020 0.02 0.03 0.003 30 0.01
2005
0.02 0.02 0.020 0.02 0.02 0.000 31 0.01
2004
0.02 0.02 0.025 0.03 0.04 0.006 30 0.01
2003
0.03 0.03 0.034 0.04 0.07 0.008 31 0.01
2002
0.03 0.04 0.040 0.04 0.07 0.007 30 0.01
2001
0.03 0.04 0.043 0.05 0.06 0.009 29 0.01
2000
0.04 0.05 0.066 0.11 0.13 0.028 28 0.01
1999
0.05 0.05 * 0.06 0.06 0.005 11 0.01
1998
0.04 0.05 * 0.08 0.08 0.011 16 0.01
1997
0.05 0.08 0.089 0.14 0.36 0.060 29 0.01
1996
0.06 0.09 0.105 0.13 0.41 0.062 30 0.01
1995
0.08 0.15 0.189 0.21 1.1 0.177 30 0.01
1994
0.07 0.14 0.162 0.26 0.37 0.073 31 0.01
1993
0.14 0.23 * 0.31 0.43 0.067 23 0.01
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.