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	Annual Toxics Summary El Cajon-Lexington Elementary School FAQs Iron nanograms per cubic meter

Year	Months Present	Minimum	Median	Mean	90th Percentile	Maximum	Standard Deviation	Number of Observations	Detection Limit
2024		89	290	*	670	734	245	13	2
2023		74	510	579	940	1020	255	30	69.4
2022		105	640	814	1200	5490	1000	27	69.4
2021		174	610	*	1200	1820	425	23	69.4
2020		162	*	*	*	1240	446	8	69.4
2019		34.7	520	613	1100	1820	434	28	69.4
2018		121	650	658	1100	1290	324	31	69.4
2017		34.7	650	767	1300	2040	427	30	69.4
2016		448	900	*	1700	1890	457	14	69.4
2015		*	*	*	*	*	*	0	*
2014		*	*	*	*	*	*	0	*
2013		*	*	*	*	*	*	0	*
2012		*	*	*	*	*	*	0	*
2011		*	*	*	*	*	*	0	*
2010		*	*	*	*	*	*	0	*
2009		*	*	*	*	*	*	0	*
2008		*	*	*	*	*	*	0	*
2007		*	*	*	*	*	*	0	*
2006		*	*	*	*	*	*	0	*
2005		*	*	*	*	*	*	0	*
2004		*	*	*	*	*	*	0	*
2003		*	*	*	*	*	*	0	*
2002		*	*	*	*	*	*	0	*
2001		*	*	*	*	*	*	0	*
2000		*	*	*	*	*	*	0	*
1999		*	*	*	*	*	*	0	*
1998		*	*	*	*	*	*	0	*
1997		*	*	*	*	*	*	0	*
1996		*	*	*	*	*	*	0	*
1995		*	*	*	*	*	*	0	*
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.