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Annual Toxics Summary
ARB's ADAM Air Quality Database
Concord-2975 Treat Blvd FAQs
Trichloroethylene
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 * *
2012
* * * * * * 0 * *
2011
* * * * * * 0 * *
2010
* * * * * * 0 * *
2009
* * * * * * 0 * *
2008
* * * * * * 0 * *
2007
* * * * * * 0 * *
2006
* * * * * * 0 * *
2005
* * * * * * 0 * *
2004
* * * * * * 0 * *
2003
* * * * * * 0 * *
2002
* * * * * * 0 * *
2001
* * * * * * 0 * *
2000
0.01 * * * 0.03 0.009 5 0.02 *
1999
0.01 0.01 * 0.01 0.04 0.009 19 0.02 *
1998
0.01 0.01 * 0.01 0.01 0.000 15 0.02 *
1997
0.01 0.01 0.057 0.01 1.1 0.202 29 0.02 2
1996
0.01 0.01 0.010 0.01 0.01 0.000 31 0.02 0.3
1995
0.01 0.01 0.013 0.02 0.04 0.007 30 0.02 0.4
1994
0.01 0.01 0.026 0.02 0.34 0.058 32 0.02 0.8
1993
0.01 0.01 0.016 0.03 0.04 0.009 30 0.02 0.5
1992
0.01 0.03 0.035 0.05 0.15 0.029 31 0.02 1
1991
0.02 0.05 0.065 0.09 0.50 0.093 28 0.02 2
1990
0.02 0.08 0.130 0.21 1.5 0.273 28 0.02 4
1989
0.02 0.05 0.068 0.10 0.24 0.047 21 0.02 2
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.