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

Year	Months Present	Minimum	Median	Mean	90th Percentile	Maximum	Standard Deviation	Number of Observations	Detection Limit
2024		*	*	*	*	*	*	0	*
2023		*	*	*	*	*	*	0	*
2022		*	*	*	*	*	*	0	*
2021		*	*	*	*	*	*	0	*
2020		*	*	*	*	*	*	0	*
2019		*	*	*	*	*	*	0	*
2018		*	*	*	*	*	*	0	*
2017		*	*	*	*	*	*	0	*
2016		*	*	*	*	*	*	0	*
2015		*	*	*	*	*	*	0	*
2014		*	*	*	*	*	*	0	*
2013		*	*	*	*	*	*	0	*
2012		*	*	*	*	*	*	0	*
2011		*	*	*	*	*	*	0	*
2010		*	*	*	*	*	*	0	*
2009		*	*	*	*	*	*	0	*
2008		*	*	*	*	*	*	0	*
2007		*	*	*	*	*	*	0	*
2006		*	*	*	*	*	*	0	*
2005		*	*	*	*	*	*	0	*
2004		*	*	*	*	*	*	0	*
2003		630	*	*	*	1700	474	4	4
2002		460	1100	*	1700	2100	436	27	4
2001		240	1100	1140	2000	2200	551	28	5
2000		540	1100	*	1900	6000	1020	29	5
1999		400	1100	1430	2700	5500	1200	26	5
1998		190	860	985	1600	2800	588	29	5
1997		120	1300	1310	2200	2900	709	30	5
1996		400	1100	*	2200	5600	1090	23	5
1995		220	1200	1460	2500	3400	815	29	5
1994		300	1300	1400	2200	3000	680	29	5
1993		130	1200	1410	2300	4700	933	30	5
1992		200	1500	1510	2700	3300	725	30	5
1991		480	1600	1680	2500	4900	931	28	5
1990		640	1900	*	5200	5900	1590	16	5
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.