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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 17 0.01
2023
0.005 0.005 0.005 0.005 0.005 0.000 31 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 0.02 0.003 29 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 28 0.01
2016
0.005 0.005 0.009 0.005 0.06 0.012 30 0.01
2015
0.005 0.005 0.011 0.03 0.05 0.012 31 0.01
2014
0.005 0.005 * 0.005 0.04 0.007 27 0.01
2013
0.005 0.005 0.005 0.005 0.005 0.000 30 0.01
2012
0.005 0.005 0.006 0.005 0.01 0.002 30 0.01
2011
0.005 0.005 0.007 0.01 0.02 0.004 31 0.01
2010
0.005 0.005 0.008 0.01 0.02 0.004 30 0.01
2009
0.005 0.01 0.010 0.01 0.02 0.003 32 0.01
2008
0.01 0.01 0.011 0.01 0.02 0.003 30 0.01
2007
0.01 0.01 0.014 0.02 0.02 0.005 31 0.01
2006
0.01 0.02 * 0.02 0.02 0.002 26 0.01
2005
0.02 0.02 0.021 0.02 0.03 0.003 29 0.01
2004
0.005 0.03 0.025 0.03 0.03 0.006 31 0.01
2003
0.03 0.03 * 0.04 0.04 0.005 28 0.01
2002
0.03 0.04 0.043 0.05 0.07 0.008 31 0.01
2001
0.04 0.05 0.048 0.05 0.08 0.008 30 0.01
2000
0.04 0.06 0.073 0.12 0.14 0.028 28 0.01
1999
0.05 0.08 * 0.12 0.16 0.029 11 0.01
1998
0.03 0.06 * 0.11 0.24 0.044 24 0.01
1997
0.06 0.09 0.164 0.24 1.2 0.211 29 0.01
1996
0.07 0.16 * 0.33 4.5 0.854 26 0.01
1995
0.16 0.35 0.430 0.71 1.2 0.254 29 0.01
1994
0.09 0.46 0.513 1.0 1.3 0.335 31 0.01
1993
0.23 0.49 1.08 1.2 9.4 1.98 31 0.01
1992
0.34 0.97 1.66 2.16 20 3.51 30 0.01
1991
0.57 1.2 1.78 3.14 7.0 1.53 30 0.01
1990
0.46 1.3 1.38 1.9 2.8 0.547 31 0.01
1989
0.28 1.2 1.27 1.97 3.0 0.667 24 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.