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	Annual Statewide Toxics Summary Manganese FAQs nanograms per cubic meter

Year	Months Present	Minimum	Median	Mean	90th Percentile	Maximum	Standard Deviation	Number of Observations	Detection Limit
2017		0.65	18.1	23.7	52	129	21.0	407	1.3
2016		0.65	17.2	24.6	56.7	188	22.6	424	1.3
2015		0.65	17.5	24.3	53.5	182	22.6	418	1.3
2014		0.85	18	25.6	54	190	24.8	398	1.7
2013		0.5	18	*	51	130	20.3	431	1.0
2012		0.75	14	17.8	40	100	15.2	454	1.5
2011		0.75	13	15.9	36	81	14.0	441	1.5
2010		0.75	9.5	13.7	26	70	11.0	404	1.5
2009		0.75	13	16.1	34	89	13.1	520	1.5
2008		0.5	18	24.0	49	130	20.9	503	1.0
2007		0.75	17	21.5	42	120	17.2	492	1.5
2006		*	*	*	*	*	*	0	*
2005		*	*	*	*	*	*	0	*
2004		*	*	*	*	*	*	0	*
2003		2.0	15	*	36.5	88	15.1	86	1.0
2002		1.0	24	31.5	61	180	26.0	491	1.0
2001		1	19	27.6	56.6	170	26.3	505	2.0
2000		1	21	26.7	55	130	21.8	472	2.0
1999		1	18	26.4	58.6	200	25.9	565	2.0
1998		1	14	20.2	43	140	20.3	561	2.0
1997		1	16	20.0	39.4	99	16.3	557	2.0
1996		1	16	20.8	44.6	180	18.8	595	2.0
1995		1	17	23.8	51	160	22.5	602	2.0
1994		1	18	22.6	44.6	120	18.4	585	2.0
1993		1	19	24.1	50	130	21.6	575	2.0
1992		1	18	23.9	50	310	23.1	554	2.0
1991		1	22	30.3	62	260	26.0	567	2.0
1990		0.5	24	29.5	57	150	23.5	600	1.0
1989		0.5	22	27.3	54.6	162	22.4	1005	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.