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Annual Toxics Summary
ARB's ADAM Air Quality Database
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Carbon Tetrachloride
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 * *
1999
* * * * * * 0 * *
1998
* * * * * * 0 * *
1997
0.08 * * * 0.11 0.010 6 0.02 *
1996
0.06 0.08 0.078 0.08 0.11 0.009 31 0.02 60
1995
0.06 0.10 0.097 0.11 0.12 0.013 30 0.02 74
1994
0.06 0.11 * 0.12 0.13 0.020 23 0.02 *
1993
0.09 0.11 0.110 0.13 0.15 0.014 26 0.02 84
1992
0.11 0.11 * 0.13 0.14 0.009 20 0.02 *
1991
0.10 0.12 0.123 0.14 0.18 0.017 29 0.02 95
1990
0.10 0.13 * 0.13 0.14 0.009 27 0.02 *
1989
0.08 0.11 * 0.14 0.15 0.015 24 0.02 *
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.