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	Annual Toxics Summary North Long Beach 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		*	*	*	*	*	*	0	*
2013		4.6	12.5	*	19.7	30	6.85	20	1.0
2012		4.0	13.5	*	21.5	34	7.00	26	1.5
2011		2.4	12	12.2	22.6	31	6.92	29	1.5
2010		2.3	9.6	*	19.4	46	9.29	22	1.5
2009		1.8	13	15.6	37.4	40	10.8	29	1.5
2008		3.2	17	18.3	33.2	60	12.0	29	1.0
2007		6.2	14	19.2	34.3	46	10.9	28	1.5
2006		*	*	*	*	*	*	0	*
2005		*	*	*	*	*	*	0	*
2004		*	*	*	*	*	*	0	*
2003		15	*	*	*	33	8.62	4	1.0
2002		6.0	16	*	30.4	40	8.67	27	1.0
2001		5.0	18.5	19.6	30.6	46	10.1	28	2.0
2000		7.0	19	*	36.4	100	17.8	29	2.0
1999		5.0	19.5	24.3	46.5	92	21.2	26	2.0
1998		2.0	13	16.5	29.2	62	11.7	29	2.0
1997		2.0	19	22.2	39	45	12.0	30	2.0
1996		9.0	19	*	38.4	180	34.8	23	2.0
1995		4.0	22	24.2	40.2	60	12.1	29	2.0
1994		7.0	21	28.2	38	120	21.3	29	2.0
1993		3.0	21	24.4	41.1	100	18.9	30	2.0
1992		4.0	22	23.5	41.2	47	11.2	30	2.0
1991		10	24.5	28.2	44.3	65	14.3	28	2.0
1990		8.0	27	31.7	54	96	20.7	31	1.0
1989		10	23.5	33.0	56.2	162	24.1	54	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.