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	Annual Toxics Summary El Cajon-Redwood Avenue FAQs Zinc 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		15	*	*	*	67	26.1	4	8.4
2013		15	26	*	45	60	12.0	23	5.2
2012		16	33	*	37	66	11.5	19	9
2011		11	30	*	55	86	18.7	26	9
2010		21	49	*	75	100	22.9	14	9
2009		4.5	37	39.1	54	94	16.9	31	9
2008		*	*	*	*	*	*	0	*
2007		20	42	*	88	160	37.7	22	3
2006		*	*	*	*	*	*	0	*
2005		*	*	*	*	*	*	0	*
2004		*	*	*	*	*	*	0	*
2003		14	*	*	*	30	6.4	5	1
2002		13	38	42.0	63	80	16.1	29	1
2001		12	39	42.0	79	110	24.4	30	2
2000		17	33	*	61	84	18.3	14	2
1999		10	37	*	48	79	16.0	20	2
1998		14	32	35.6	57	65	15.2	24	2
1997		14	30	32.9	50	67	13.7	27	2
1996		16	35	40.3	64	96	19.0	27	2
1995		20	47	*	66	110	22.1	27	2
1994		9	33	*	54	93	17.7	27	2
1993		8	36	37.6	59	110	21.8	29	2
1992		4	34	36.5	65	92	22.2	26	2
1991		9	42	48.8	63	240	39.6	31	2
1990		14	47	*	67	100	21.2	15	2
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.