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Benzene
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
0.13 0.22 * 0.55 0.82 0.19 22 0.05 *
2012
0.12 0.32 0.402 0.68 1.0 0.211 29 0.05 105
2011
0.12 0.34 0.444 0.91 1.2 0.306 30 0.05 115
2010
0.15 0.24 0.381 0.66 1.3 0.269 26 0.05 99
2009
0.11 0.29 0.418 0.79 1.0 0.273 29 0.05 109
2008
0.15 0.31 0.445 0.85 1.5 0.318 30 0.05 116
2007
0.12 0.31 0.414 0.8 1.3 0.311 29 0.05 108
2006
0.15 0.33 0.484 0.83 1.8 0.365 30 0.05 126
2005
0.16 0.5 * 1.1 1.6 0.412 26 0.05 *
2004
0.19 0.53 0.554 0.91 1.5 0.307 31 0.05 144
2003
0.29 0.55 0.705 1.24 1.5 0.365 27 0.05 183
2002
0.21 0.57 0.705 1.25 2.1 0.45 26 0.05 184
2001
0.27 0.54 * 1.7 3.1 0.66 26 0.05 *
2000
0.3 0.7 1.00 1.9 2.7 0.65 28 0.2 259
1999
0.2 0.7 1.11 1.8 3.9 0.82 24 0.2 290
1998
0.5 0.9 1.16 2.1 2.9 0.68 30 0.2 303
1997
0.1 0.9 1.24 2.3 3.5 0.82 31 0.2 322
1996
0.25 1.0 * 2.4 4.1 1.01 22 0.5 *
1995
0.25 1.3 1.69 3.7 4.6 1.10 31 0.5 441
1994
0.25 1.8 2.04 3.6 6.0 1.19 29 0.5 530
1993
0.25 1.4 1.99 4.0 5.0 1.16 32 0.5 519
1992
0.8 2.0 2.60 4.9 6.5 1.50 30 0.5 677
1991
0.8 2.3 2.45 4.6 6.7 1.47 29 0.5 638
1990
1.4 2.8 3.53 6.5 9.2 2.05 31 0.5 920
1989
2.0 2.6 * 8.6 9.6 2.67 21 0.5 *
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.