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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
0.005 0.005 * 0.005 0.005 0.000 14 0.01
2023
0.005 0.005 0.005 0.005 0.005 0.000 29 0.01
2022
0.005 0.005 0.005 0.005 0.005 0.000 30 0.01
2021
0.005 0.005 * 0.005 0.005 0.000 23 0.01
2020
0.005 * * * 0.005 0.000 9 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 29 0.01
2016
0.005 0.005 0.007 0.005 0.09 0.015 31 0.01
2015
0.005 0.005 0.006 0.005 0.03 0.004 30 0.01
2014
0.005 0.005 0.005 0.005 0.005 0.000 28 0.01
2013
0.005 0.005 0.005 0.005 0.01 0.001 31 0.01
2012
0.005 0.005 0.006 0.005 0.02 0.003 29 0.01
2011
0.005 0.005 0.007 0.01 0.02 0.004 31 0.01
2010
0.005 0.01 0.009 0.01 0.02 0.004 29 0.01
2009
0.005 0.01 0.010 0.01 0.02 0.003 28 0.01
2008
0.005 0.01 0.010 0.01 0.02 0.003 31 0.01
2007
0.01 0.01 0.014 0.02 0.02 0.005 29 0.01
2006
0.01 0.02 0.019 0.02 0.02 0.003 30 0.01
2005
0.02 0.02 0.021 0.02 0.03 0.002 31 0.01
2004
0.02 0.03 0.027 0.04 0.04 0.007 30 0.01
2003
0.02 0.03 0.034 0.04 0.05 0.007 31 0.01
2002
0.03 0.04 * 0.05 0.06 0.007 16 0.01
2001
0.03 0.04 0.040 0.05 0.06 0.006 30 0.01
2000
0.04 0.05 0.063 0.11 0.12 0.025 28 0.01
1999
0.05 0.07 * 0.07 0.09 0.011 11 0.01
1998
0.03 0.06 * 0.07 0.12 0.018 27 0.01
1997
0.05 0.07 0.075 0.10 0.13 0.022 29 0.01
1996
0.06 0.10 0.109 0.18 0.25 0.049 31 0.01
1995
0.10 0.17 0.191 0.28 0.73 0.125 29 0.01
1994
0.06 0.19 0.256 0.46 1.2 0.225 30 0.01
1993
0.16 0.29 * 0.73 0.91 0.219 26 0.01
1992
0.22 0.44 0.606 1.1 2.5 0.447 31 0.01
1991
0.26 0.70 1.13 1.85 5.9 1.13 26 0.01
1990
0.23 0.53 * 1.98 2.7 0.725 27 0.01
1989
0.14 0.65 1.32 2.34 5.2 1.19 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.