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Annual Statewide Toxics Summary		 ARB's ADAM Air Quality Database
Benzene FAQs
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
2022
0.025 0.1 * 0.32 1.6 0.175 228 0.05 *
2021
0.025 0.12 * 0.32 0.94 0.138 314 0.05 *
2020
0.07 0.2 * 0.39 1.0 0.157 106 0.05 *
2019
0.025 0.13 0.173 0.32 0.86 0.126 400 0.05 45
2018
0.025 0.17 0.251 0.44 3.4 0.289 392 0.05 65
2017
0.025 0.18 0.261 0.47 1.7 0.224 391 0.05 68
2016
0.025 0.21 0.267 0.53 2.2 0.219 427 0.05 70
2015
0.025 0.2 0.253 0.49 1.5 0.198 412 0.05 66
2014
0.025 0.19 0.268 0.49 3.0 0.247 387 0.05 70
2013
0.05 0.23 0.297 0.57 1.5 0.228 469 0.05 77
2012
0.06 0.23 0.311 0.55 3.5 0.268 467 0.05 81
2011
0.025 0.24 0.322 0.7 1.6 0.26 490 0.05 84
2010
0.05 0.25 0.318 0.55 1.8 0.229 473 0.05 83
2009
0.025 0.25 0.339 0.69 2.3 0.281 512 0.05 88
2008
0.06 0.25 0.34 0.67 2.2 0.257 518 0.05 89
2007
0.05 0.25 0.375 0.81 2.8 0.34 495 0.05 97
2006
0.05 0.29 0.41 0.84 4.9 0.387 504 0.05 107
2005
0.05 0.3 0.478 1.0 7.3 0.516 510 0.05 124
2004
0.06 0.36 0.461 0.9 2.5 0.354 503 0.05 120
2003
0.1 0.42 0.565 1.0 4.4 0.454 503 0.05 147
2002
0.08 0.48 0.625 1.3 7.3 0.61 459 0.05 163
2001
0.08 0.45 0.608 1.2 4.2 0.543 499 0.05 158
2000
0.1 0.5 0.71 1.6 4.9 0.64 526 0.2 186
1999
0.1 0.6 0.85 1.7 9.9 0.80 595 0.2 221
1998
0.1 0.6 0.86 1.7 4.6 0.71 617 0.2 224
1997
0.1 0.6 0.85 1.8 6.9 0.84 571 0.2 222
1996
0.25 0.25 0.93 1.9 7.4 0.95 633 0.5 241
1995
0.25 1.2 1.31 2.7 11 1.08 616 0.5 340
1994
0.25 1.4 1.58 2.9 7.8 1.12 607 0.5 410
1993
0.25 1.3 1.50 3.0 5.5 1.10 596 0.5 390
1992
0.25 1.5 1.71 3.4 6.5 1.19 598 0.5 445
1991
0.25 1.7 2.14 4.3 8.4 1.52 581 0.5 556
1990
0.25 2.2 2.57 4.5 10 1.66 579 0.5 669
1989
0.25 2.3 2.97 5.4 16 2.21 437 0.5 773
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.