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	Annual Toxics Summary San Jose-4th Street FAQs 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
2025		*	*	*	*	*	*	0	*	*
2024		*	*	*	*	*	*	0	*	*
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		0.27	*	*	*	1.5	0.459	9	0.05	*
2001		0.17	0.35	*	0.82	2.8	0.509	28	0.05	*
2000		0.1	0.4	0.70	1.6	3.1	0.69	30	0.2	182
1999		0.2	0.5	0.73	1.3	2.4	0.53	30	0.2	190
1998		0.1	0.8	1.04	2.1	4.1	0.85	31	0.2	272
1997		0.1	0.6	0.93	1.8	2.8	0.73	29	0.2	242
1996		0.25	0.8	0.97	2.7	3.7	0.99	32	0.5	251
1995		0.25	1.5	1.55	3.3	4.6	1.08	30	0.5	404
1994		0.25	1.7	1.88	3.3	7.8	1.49	31	0.5	490
1993		0.25	1.6	1.89	4.5	5.1	1.49	30	0.5	491
1992		0.25	1.5	2.03	4.6	5.0	1.46	31	0.5	528
1991		0.25	2.1	2.44	5.0	7.6	1.80	28	0.5	636
1990		0.9	2.3	3.02	5.3	10	2.20	27	0.5	786
1989		0.9	2.6	*	8.9	16	4.02	21	0.5	*

	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.