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

Year	Months Present	Minimum	Median	Mean	90th Percentile	Maximum	Standard Deviation	Number of Observations	Detection Limit
2023		*	*	*	*	*	*	0	*
2022		*	*	*	*	*	*	0	*
2021		*	*	*	*	*	*	0	*
2020		*	*	*	*	*	*	0	*
2019		*	*	*	*	*	*	0	*
2018		*	*	*	*	*	*	0	*
2017		*	*	*	*	*	*	0	*
2016		*	*	*	*	*	*	0	*
2015		*	*	*	*	*	*	0	*
2014		2.5	*	*	*	10	3.52	4	2.0
2013		0.8	0.8	*	1.7	3.3	0.57	28	1.6
2012		1.5	1.5	1.64	1.5	4.6	0.68	29	3.0
2011		1.5	*	*	*	5.3	1.70	5	3.0
2010		1.5	1.5	1.65	1.5	6.8	1.02	27	3.0
2009		1.5	1.5	1.50	1.5	1.5	0.00	31	3.0
2008		*	*	*	*	*	*	0	*
2007		0.75	0.75	*	3.5	5.9	1.44	18	1.5
2006		*	*	*	*	*	*	0	*
2005		*	*	*	*	*	*	0	*
2004		*	*	*	*	*	*	0	*
2003		2.5	*	*	*	6.0	1.57	5	5.0
2002		2	2	4.09	8.0	14	3.29	29	4.0
2001		2	2	3.54	7.1	12	2.49	30	4.0
2000		2	2	*	2	4.0	0.73	14	4.0
1999		2	2	*	2	4.0	0.62	20	4.0
1998		2	2	2.82	6.4	12	2.44	24	4.0
1997		2	2	2.00	2	2	0.00	27	4.0
1996		2	2	2.08	2	4.0	0.38	27	4.0
1995		2	2	*	2	4.0	0.53	27	4.0
1994		2	2	*	2	7.0	1.25	27	4.0
1993		2	2	2.93	5.0	10	1.77	29	4.0
1992		2	*	*	*	7.0	2.06	9	4.0
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.