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

Read About Estimated Risk

Year	Months Present	Minimum	Median	Mean	90th Percentile	Maximum	Standard Deviation	Number of Observations	Detection Limit	Estimated Risk
2024		*	*	*	*	*	*	0	*	*
2023		*	*	*	*	*	*	0	*	*
2022		*	*	*	*	*	*	0	*	*
2021		*	*	*	*	*	*	0	*	*
2020		*	*	*	*	*	*	0	*	*
2019		*	*	*	*	*	*	0	*	*
2018		*	*	*	*	*	*	0	*	*
2017		*	*	*	*	*	*	0	*	*
2016		*	*	*	*	*	*	0	*	*
2015		*	*	*	*	*	*	0	*	*
2014		*	*	*	*	*	*	0	*	*
2013		0.5	2.0	*	4.8	9.1	2.41	20	1.0	*
2012		0.75	3.9	*	7.5	10	2.17	26	1.5	*
2011		1.7	4.9	*	9.9	13	3.01	22	1.5	*
2010		0.75	3.8	*	13.3	190	43.9	18	1.5	*
2009		0.75	6.6	7.65	12.2	16	3.68	29	1.5	0.3
2008		*	*	*	*	*	*	0	*	*
2007		2.6	8.8	*	20.4	26	6.56	19	1.5	*
2006		*	*	*	*	*	*	0	*	*
2005		*	*	*	*	*	*	0	*	*
2004		*	*	*	*	*	*	0	*	*
2003		7.0	*	*	*	12	2.16	4	3.0	*
2002		1.5	9.0	*	15.8	18	4.31	27	3.0	*
2001		2	10	11.2	22.6	34	7.84	28	4.0	0.4
2000		2	9.0	*	24	180	32.5	29	4.0	*
1999		2	10	12.5	27	45	11.0	26	4.0	0.4
1998		2	11	12.3	18.2	46	8.22	29	4.0	0.4
1997		2	16	17.3	33.1	43	11.7	30	4.0	0.6
1996		5.0	13	*	30.4	290	57.8	23	4.0	*
1995		4.0	15	19.4	33.6	61	12.5	29	4.0	0.7
1994		5.0	20	24.8	42.6	71	15.0	29	4.0	0.8
1993		6.0	25	29.1	53	78	18.8	30	4.0	1
1992		5.0	23.5	29.1	53.2	67	16.2	30	4.0	1
1991		12	42.5	53.7	100	140	33.4	28	4.0	2
1990		13	41	63.5	140	171	43.8	31	1.0	2
1989		12	39	60.1	110	163	41.2	54	1.0	2

	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.