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

Year	Months Present	Minimum	Median	Mean	90th Percentile	Maximum	Standard Deviation	Number of Observations	Detection Limit
2025		3.1	9.7	*	17.1	42	9.28	16	1.3
2024		0.7	9.9	11.6	20.3	35.5	7.84	30	0.0
2023		0.65	9.2	10.4	16.8	19.5	4.90	30	1.3
2022		0.65	11	15.9	20.9	125	22.9	27	1.3
2021		2.5	10.1	*	19	31.7	7.46	23	1.3
2020		3.0	*	*	*	20.1	6.86	8	1.3
2019		1.4	10.2	11.1	20.4	34.6	7.92	28	1.3
2018		2.2	11.7	11.9	20	24.4	6.11	31	1.3
2017		2.5	12	13.5	22.9	33	7.46	30	1.3
2016		7.0	18.7	*	29.5	31.9	8.21	14	1.3
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.