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

Year	Months Present	Minimum	Median	Mean	90th Percentile	Maximum	Standard Deviation	Number of Observations	Detection Limit
2025		*	*	*	*	*	*	0	*
2024		*	*	*	*	*	*	0	*
2023		*	*	*	*	*	*	0	*
2022		*	*	*	*	*	*	0	*
2021		*	*	*	*	*	*	0	*
2020		*	*	*	*	*	*	0	*
2019		*	*	*	*	*	*	0	*
2018		*	*	*	*	*	*	0	*
2017		*	*	*	*	*	*	0	*
2016		*	*	*	*	*	*	0	*
2015		*	*	*	*	*	*	0	*
2014		12	*	*	*	34	10.5	4	1.7
2013		4.9	16	*	27.6	35	8.08	28	1.0
2012		2.9	12	12.9	21.8	39	8.63	29	1.5
2011		2.4	11	11.3	20	28	6.67	31	1.5
2010		2.4	11	*	24.6	26	7.06	25	1.5
2009		0.75	10	13.8	21	51	10.8	31	1.5
2008		2.5	16.5	17.7	32.3	40	10.3	28	1.0
2007		3.6	19.5	23.7	46.6	69	16.7	30	1.5
2006		*	*	*	*	*	*	0	*
2005		*	*	*	*	*	*	0	*
2004		*	*	*	*	*	*	0	*
2003		5.0	*	*	*	29	9.81	5	1.0
2002		8.0	24	28.3	43.2	55	12.3	29	1.0
2001		4.0	24.5	23.4	37.3	49	12.7	30	2.0
2000		8.0	25.5	*	46.2	58	14.6	14	2.0
1999		2.0	20	*	43.2	73	16.4	20	2.0
1998		4.0	18.5	19.8	33.4	47	11.0	24	2.0
1997		3.0	19	18.3	34.4	35	9.85	27	2.0
1996		2.0	17	22.0	45.2	58	14.3	27	2.0
1995		1	23	*	43.2	64	14.6	27	2.0
1994		3.0	17	*	28.6	55	11.1	27	2.0
1993		1	19	19.9	34.4	59	12.9	29	2.0
1992		1	17	20.1	39	46	13.3	26	2.0
1991		4.0	22	34.1	39	260	43.5	31	2.0
1990		5.0	28	29.4	43.1	75	15.2	30	1.0
1989		6.0	30	30.6	54.4	79	16.1	59	1.0

	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.