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	Annual Toxics Summary Calexico-Ethel 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
2024		0.1	0.22	*	0.53	1.7	0.398	15	0.05	*
2023		0.09	0.21	0.299	0.59	1.4	0.277	30	0.05	78
2022		0.025	0.18	0.272	0.52	1.6	0.329	31	0.05	71
2021		0.05	0.17	*	0.48	0.9	0.22	23	0.05	*
2020		0.14	*	*	*	1.0	0.385	7	0.05	*
2019		0.06	0.19	0.228	0.46	0.62	0.15	28	0.05	59
2018		0.07	0.28	0.316	0.55	1.2	0.233	28	0.05	82
2017		0.025	0.2	0.334	0.84	1.5	0.401	29	0.05	87
2016		0.025	0.32	0.483	0.95	2.2	0.50	30	0.05	126
2015		0.09	0.24	0.386	0.74	1.5	0.37	30	0.05	100
2014		0.05	0.25	0.516	1.21	3.0	0.619	30	0.05	134
2013		0.13	0.29	0.417	1.0	1.4	0.334	31	0.05	109
2012		0.07	0.33	0.632	1.1	3.5	0.741	29	0.05	164
2011		0.07	0.32	0.442	1.0	1.6	0.403	31	0.05	115
2010		0.09	0.41	*	0.85	1.8	0.45	19	0.05	*
2009		0.05	0.35	0.49	0.93	2.3	0.49	31	0.05	127
2008		0.06	0.38	0.48	1.12	2.2	0.458	29	0.05	125
2007		0.09	0.45	0.735	1.66	2.8	0.666	28	0.05	191
2006		0.11	0.55	0.855	1.9	4.9	0.945	31	0.05	223
2005		0.11	0.54	1.03	2.06	7.3	1.38	30	0.05	269
2004		0.11	0.44	0.789	1.7	2.5	0.646	31	0.05	205
2003		0.14	0.55	1.02	2.24	4.4	1.03	30	0.05	264
2002		0.16	0.66	1.30	3.33	7.3	1.60	30	0.05	339
2001		0.09	0.6	0.878	1.5	4.2	0.814	31	0.05	228
2000		0.1	0.8	1.18	2.7	4.9	1.11	31	0.2	306
1999		0.1	1.3	1.75	4.0	9.9	2.01	29	0.2	454
1998		0.1	0.9	1.45	3.2	4.6	1.20	29	0.2	378
1997		0.1	1.0	1.61	4.9	6.9	2.00	29	0.2	418
1996		0.25	1.4	1.99	4.3	6.6	1.84	30	0.5	518
1995		0.8	1.8	*	5.2	11	2.90	12	0.5	*
1994		*	*	*	*	*	*	0	*	*
1993		*	*	*	*	*	*	0	*	*
1992		*	*	*	*	*	*	0	*	*
1991		*	*	*	*	*	*	0	*	*
1990		*	*	*	*	*	*	0	*	*
1989		*	*	*	*	*	*	0	*	*

	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.