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	Annual Toxics Summary El Cajon-Redwood Avenue FAQs Chromium nanograms per cubic meter

Year	Months Present	Minimum	Median	Mean	90th Percentile	Maximum	Standard Deviation	Number of Observations	Detection Limit
2024		*	*	*	*	*	*	0	*
2023		*	*	*	*	*	*	0	*
2022		*	*	*	*	*	*	0	*
2021		*	*	*	*	*	*	0	*
2020		*	*	*	*	*	*	0	*
2019		*	*	*	*	*	*	0	*
2018		*	*	*	*	*	*	0	*
2017		*	*	*	*	*	*	0	*
2016		*	*	*	*	*	*	0	*
2015		*	*	*	*	*	*	0	*
2014		3.4	*	*	*	7	2.0	4	6.8
2013		4	4	*	3	5	0.6	28	3
2012		1.5	1.5	2.5	4	6	1.3	29	3
2011		1.5	4	*	5	6	1.4	29	3
2010		1.5	3	3.1	5	6	1.5	27	3
2009		1.5	1.5	2.2	4	6	1.1	31	3
2008		*	*	*	*	*	*	0	*
2007		1.5	1.5	*	8	11	3.0	27	3
2006		*	*	*	*	*	*	0	*
2005		*	*	*	*	*	*	0	*
2004		*	*	*	*	*	*	0	*
2003		1	*	*	*	3	0.9	5	2
2002		1	2	2.6	5	6	1.5	29	2
2001		1	1	2.1	4	5	1.3	30	2
2000		1	3	*	5	24	5.9	14	2
1999		1	3	*	7	8	2.2	20	2
1998		1	3	2.6	4	6	1.5	24	2
1997		1	2	2.3	4	5	1.3	27	2
1996		1	2	2.2	4	7	1.6	27	2
1995		1	3	*	4	9	2.1	27	2
1994		1	2	*	5	10	2.4	27	2
1993		1	3	2.8	6	6	1.9	29	2
1992		1	3	2.6	5	7	1.9	26	2
1991		1	2	2.5	4	10	1.9	31	2
1990		1	3	2.6	4	5	1.2	30	1
1989		0.5	3	2.9	5	8	1.6	59	1

	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.