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Annual Toxics Summary		 ARB's ADAM Air Quality Database
Riverside-Rubidoux FAQs
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 20 0.01
2024
0.005 0.005 0.005 0.005 0.005 0.000 29 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 29 0.01
2021
0.005 0.005 * 0.005 0.005 0.000 22 0.01
2020
0.005 * * * 0.005 0.000 7 0.01
2019
0.005 0.005 * 0.005 0.005 0.000 26 0.01
2018
* * * * * * 0 *
2017
0.005 0.005 * 0.005 0.005 0.000 20 0.01
2016
0.005 0.005 0.005 0.005 0.01 0.002 30 0.01
2015
0.005 0.005 * 0.02 0.04 0.009 25 0.01
2014
0.005 0.005 * 0.02 0.04 0.009 27 0.01
2013
0.005 0.005 0.005 0.005 0.01 0.001 31 0.01
2012
0.005 0.005 0.005 0.005 0.01 0.002 30 0.01
2011
0.005 0.005 0.008 0.01 0.03 0.005 31 0.01
2010
0.005 0.01 0.010 0.01 0.02 0.003 31 0.01
2009
0.005 0.01 * 0.02 0.02 0.005 27 0.01
2008
0.01 0.01 0.014 0.02 0.02 0.005 30 0.01
2007
0.01 0.02 0.018 0.02 0.02 0.004 30 0.01
2006
0.02 0.02 0.021 0.02 0.03 0.003 29 0.01
2005
0.02 0.02 0.025 0.03 0.03 0.005 31 0.01
2004
0.02 0.03 0.030 0.04 0.04 0.007 29 0.01
2003
0.03 0.04 0.053 0.09 0.21 0.035 30 0.01
2002
0.04 0.05 * 0.06 0.06 0.008 26 0.01
2001
0.04 0.08 0.095 0.14 0.21 0.046 31 0.01
2000
0.05 0.09 0.092 0.14 0.17 0.032 30 0.01
1999
0.05 0.08 * 0.15 0.19 0.041 17 0.01
1998
0.04 0.09 * 0.15 0.17 0.044 13 0.01
1997
0.10 * * * 0.10 1.77 1 0.01
1996
0.09 0.25 0.643 1.4 10 1.77 31 0.01
1995
0.11 0.62 0.798 1.5 3.1 0.727 31 0.01
1994
0.13 0.91 1.14 1.9 5.2 0.984 31 0.01
1993
0.19 0.95 1.36 2.9 3.7 1.03 29 0.01
1992
0.23 1.3 1.49 3.21 5.1 1.13 30 0.01
1991
0.44 1.55 2.07 4.53 6.6 1.67 28 0.01
1990
0.26 1.55 1.92 4.03 6.4 1.54 28 0.01
1989
0.25 1.35 * 2.8 6.8 1.43 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.