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	Annual Toxics Summary North Long Beach FAQs Copper nanograms per cubic meter

Year	Months Present	Minimum	Median	Mean	90th Percentile	Maximum	Standard Deviation	Number of Observations	Detection Limit
2023		*	*	*	*	*	*	0	*
2022		*	*	*	*	*	*	0	*
2021		*	*	*	*	*	*	0	*
2020		*	*	*	*	*	*	0	*
2019		*	*	*	*	*	*	0	*
2018		*	*	*	*	*	*	0	*
2017		*	*	*	*	*	*	0	*
2016		*	*	*	*	*	*	0	*
2015		*	*	*	*	*	*	0	*
2014		*	*	*	*	*	*	0	*
2013		9.0	19.5	*	38.5	46	10.8	20	1.5
2012		11	21	*	33.5	40	8.37	20	1.5
2011		5.2	19	*	38.6	53	12.3	19	1.5
2010		4.7	18	*	39	68	15.3	19	1.5
2009		10	21	*	50.1	57	15.3	24	1.5
2008		*	*	*	*	*	*	0	*
2007		5.8	22	*	35.8	84	16.4	25	1.5
2006		*	*	*	*	*	*	0	*
2005		*	*	*	*	*	*	0	*
2004		*	*	*	*	*	*	0	*
2003		23	*	*	*	36	5.92	4	1.0
2002		10	30	*	47.2	59	12.2	27	1.0
2001		10	30	34.5	64.6	110	23.1	28	2.0
2000		10	24	*	41.4	89	15.4	29	2.0
1999		7.0	21.5	24.4	38.5	77	16.5	26	2.0
1998		6.0	18	21.0	30.2	51	10.3	29	2.0
1997		5.0	21.5	25.1	40.7	51	12.1	30	2.0
1996		12	41	*	73.4	120	25.4	23	2.0
1995		21	38	44.7	66	140	23.4	29	2.0
1994		12	34	38.0	55	78	16.2	29	2.0
1993		12	35	39.7	55.1	78	14.4	30	2.0
1992		8.0	40.5	42.2	57.7	71	13.9	30	2.0
1991		21	43	44.6	61.3	100	16.3	28	2.0
1990		15	29.5	*	47.5	71	13.7	16	2.0
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.