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	Annual Toxics Summary El Cajon-Redwood Avenue 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
2022		*	*	*	*	*	*	0	*	*
2021		*	*	*	*	*	*	0	*	*
2020		*	*	*	*	*	*	0	*	*
2019		*	*	*	*	*	*	0	*	*
2018		*	*	*	*	*	*	0	*	*
2017		*	*	*	*	*	*	0	*	*
2016		*	*	*	*	*	*	0	*	*
2015		*	*	*	*	*	*	0	*	*
2014		*	*	*	*	*	*	0	*	*
2013		0.1	0.22	0.266	0.5	0.71	0.164	30	0.05	69
2012		0.1	0.23	0.312	0.57	0.85	0.186	30	0.05	81
2011		0.09	0.2	0.302	0.61	1.0	0.227	31	0.05	79
2010		0.12	0.27	0.32	0.52	0.9	0.194	30	0.05	83
2009		0.09	0.23	0.332	0.65	1.0	0.226	30	0.05	86
2008		0.12	0.27	0.347	0.7	0.86	0.229	30	0.05	90
2007		0.11	0.21	0.472	0.95	2.1	0.465	28	0.05	123
2006		0.14	0.27	0.399	0.88	1.3	0.309	32	0.05	104
2005		0.12	0.29	0.449	1.0	1.2	0.339	28	0.05	117
2004		0.09	0.43	0.402	0.64	0.78	0.205	30	0.05	105
2003		0.19	0.47	0.561	1.1	1.3	0.322	30	0.05	146
2002		0.18	0.4	0.563	1.2	1.3	0.346	29	0.05	146
2001		0.18	0.39	0.588	1.24	2.1	0.491	30	0.05	153
2000		0.1	0.5	0.74	1.6	2.2	0.58	29	0.2	193
1999		0.3	0.7	0.98	1.7	3.0	0.69	29	0.2	256
1998		0.1	0.5	0.91	1.8	2.4	0.65	26	0.2	236
1997		0.1	0.8	0.89	1.6	2.8	0.66	27	0.2	231
1996		0.25	0.25	0.86	1.5	3.2	0.75	30	0.5	223
1995		0.25	1.2	1.14	2.7	3.1	0.89	29	0.5	296
1994		0.25	1.8	*	2.9	3.7	1.01	27	0.5	*
1993		0.25	1.2	1.51	2.8	3.7	1.07	28	0.5	394
1992		0.25	1.5	1.94	3.8	4.3	1.24	29	0.5	504
1991		0.25	1.8	2.20	3.8	4.9	1.29	29	0.5	572
1990		0.25	2.1	2.50	4.7	6.2	1.53	31	0.5	650
1989		0.25	2.4	*	6.4	7.3	1.99	23	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.