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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
0.025 0.1 * 0.15 0.23 0.048 15 0.05 *
2022
0.025 0.17 0.196 0.39 0.49 0.124 29 0.05 51
2021
0.05 0.14 * 0.5 0.64 0.164 23 0.05 *
2020
0.12 * * * 0.47 0.107 7 0.05 *
2019
0.06 0.13 0.168 0.32 0.55 0.115 29 0.05 44
2018
0.05 0.19 0.249 0.4 1.5 0.248 36 0.05 65
2017
0.05 0.19 0.269 0.56 1.0 0.222 30 0.05 70
2016
0.05 0.23 0.295 0.59 0.68 0.169 30 0.05 77
2015
0.025 0.26 0.279 0.48 0.95 0.209 30 0.05 73
2014
0.1 0.24 * 0.53 0.81 0.194 16 0.05 *
2013
0.07 0.21 * 0.46 0.75 0.185 23 0.05 *
2012
0.11 0.26 0.307 0.57 0.86 0.172 33 0.05 80
2011
0.07 0.24 0.28 0.5 0.76 0.165 33 0.05 73
2010
0.08 0.29 0.306 0.53 0.59 0.154 30 0.05 80
2009
0.07 0.28 0.325 0.65 1.1 0.238 34 0.05 85
2008
0.1 0.26 0.354 0.74 0.94 0.239 33 0.05 92
2007
0.07 0.24 0.31 0.75 0.82 0.224 32 0.05 81
2006
0.12 0.29 0.383 0.7 1.2 0.264 30 0.05 100
2005
0.09 0.32 0.355 0.64 1.0 0.222 31 0.05 92
2004
0.09 0.33 * 0.63 0.76 0.195 25 0.05 *
2003
0.13 0.35 0.405 0.61 1.1 0.224 29 0.05 105
2002
0.1 0.37 0.506 1.01 1.3 0.32 30 0.05 132
2001
0.14 0.34 0.549 1.2 1.8 0.421 31 0.05 143
2000
0.1 0.4 0.58 1.3 2.0 0.52 31 0.2 152
1999
0.1 0.5 0.71 1.5 2.2 0.50 30 0.2 186
1998
0.1 0.6 0.70 1.4 2.0 0.48 31 0.2 181
1997
0.1 0.6 0.57 1.0 1.7 0.38 32 0.2 148
1996
0.25 0.25 0.78 1.7 3.7 0.81 32 0.5 204
1995
0.25 1.3 1.14 2.3 3.7 0.94 32 0.5 297
1994
0.25 1.2 * 2.0 3.2 0.78 23 0.5 *
1993
* * * * * * 0 * *
1992
* * * * * * 0 * *
1991
* * * * * * 0 * *
1990
* * * * * * 0 * *
1989
* * * * * * 0 * *
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.