Sites with methylene chloride data available Available Substances Toxics Statistics Home Page Data Descriptions Page
California Home ARB: Home Search Site Map Contact Us
California Air Resources Board

Annual Toxics Summary
ARB's ADAM Air Quality Database
El Cajon-Redwood Avenue FAQs
Methylene Chloride
parts per billion
Read About Estimated Risk
Year Months
Present
Minimum Median Mean 90th
Percentile
Maximum Standard
Deviation
Number of
Observations
Detection
Limit
Estimated
Risk
2023
* * * * * * 0 * *
2022
* * * * * * 0 * *
2021
* * * * * * 0 * *
2020
* * * * * * 0 * *
2019
* * * * * * 0 * *
2018
* * * * * * 0 * *
2017
* * * * * * 0 * *
2016
* * * * * * 0 * *
2015
* * * * * * 0 * *
2014
* * * * * * 0 * *
2013
0.05 0.12 0.126 0.17 0.31 0.056 30 0.1 1
2012
0.05 0.12 0.178 0.25 1.2 0.222 30 0.1 2
2011
0.05 0.11 0.133 0.21 0.73 0.127 31 0.1 1
2010
0.05 0.13 0.315 0.22 6.8 1.22 30 0.1 3
2009
0.05 0.11 0.131 0.24 0.6 0.111 31 0.1 1
2008
0.05 0.11 0.118 0.22 0.31 0.076 30 0.1 1
2007
0.05 0.13 0.16 0.31 0.59 0.138 28 0.1 2
2006
0.05 0.15 0.17 0.33 0.52 0.115 32 0.1 2
2005
0.05 0.12 0.141 0.28 0.34 0.098 28 0.1 1
2004
0.05 0.13 0.136 0.26 0.28 0.082 29 0.1 1
2003
0.05 0.16 0.18 0.29 0.38 0.095 30 0.1 2
2002
0.05 0.14 0.185 0.32 0.77 0.151 29 0.1 2
2001
0.5 0.14 0.189 0.28 0.51 0.141 30 0.1 2
2000
0.5 0.5 0.87 0.5 8.3 1.50 28 1.0 9
1999
0.5 0.5 0.52 0.5 1.1 0.12 24 1.0 5
1998
0.5 0.5 * 0.5 4.5 0.87 21 1.0 *
1997
0.5 0.5 0.52 0.5 1.1 0.12 26 1.0 5
1996
0.5 0.5 0.61 0.5 1.3 0.23 30 1.0 6
1995
0.5 0.5 0.70 1.2 1.9 0.36 29 1.0 7
1994
0.5 0.5 * 2.0 5.5 1.16 28 1.0 *
1993
0.5 0.5 1.25 1.1 17 3.11 28 1.0 12
1992
0.5 0.5 1.87 0.5 32 5.84 29 1.0 19
1991
0.5 0.5 1.07 1.6 8.6 1.77 29 1.0 11
1990
0.5 0.5 0.59 0.5 1.6 0.29 30 1.0 6
1989
0.5 0.5 0.93 1.8 3.6 0.76 24 1.0 9
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.