Sites with 1,3-butadiene 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
Azusa FAQs
1,3-Butadiene
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
0.02 0.02 * 0.02 0.04 0.005 22 0.04 *
2021
0.02 0.02 * 0.02 0.08 0.016 24 0.04 *
2020
0.02 * * * 0.04 0.008 7 0.04 *
2019
0.02 0.02 0.022 0.02 0.07 0.009 30 0.04 24
2018
0.02 0.02 0.028 0.02 0.13 0.025 30 0.04 30
2017
0.02 0.02 0.027 0.07 0.08 0.018 30 0.04 29
2016
0.02 0.02 0.045 0.10 0.17 0.039 31 0.04 49
2015
0.02 0.02 0.032 0.06 0.10 0.021 30 0.04 35
2014
0.02 0.02 0.043 0.07 0.15 0.030 29 0.04 46
2013
0.02 0.02 0.041 0.09 0.22 0.044 31 0.04 44
2012
0.02 0.02 0.039 0.07 0.14 0.028 30 0.04 43
2011
0.02 0.05 0.058 0.11 0.22 0.046 30 0.04 62
2010
0.02 0.04 0.062 0.09 0.19 0.040 24 0.04 68
2009
0.02 0.04 0.053 0.10 0.32 0.059 31 0.04 57
2008
0.02 0.05 * 0.29 1.4 0.351 28 0.04 *
2007
0.02 0.05 0.298 0.19 5.1 0.981 27 0.04 322
2006
0.02 0.05 0.061 0.10 0.28 0.052 29 0.04 65
2005
0.02 0.07 0.078 0.14 0.22 0.053 29 0.04 85
2004
0.02 0.07 0.076 0.15 0.22 0.052 29 0.04 82
2003
0.02 0.08 0.076 0.13 0.26 0.056 28 0.04 83
2002
0.02 0.11 0.135 0.29 0.40 0.101 28 0.04 146
2001
0.02 0.14 * 0.27 0.31 0.084 26 0.04 *
2000
0.04 0.13 0.146 0.23 0.65 0.114 30 0.04 158
1999
0.14 * * * 0.14 0.094 1 0.04 *
1998
* * * * * * 0 * *
1997
* * * * * * 0 * *
1996
* * * * * * 0 * *
1995
* * * * * * 0 * *
1994
* * * * * * 0 * *
1993
* * * * * * 0 * *
1992
* * * * * * 0 * *
1991
* * * * * * 0 * *
1990
* * * * * * 0 * *
1989
0.08 * * * 0.38 0.094 9 0.04 *
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.