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	Annual Toxics Summary North Long Beach FAQs Phosphorus 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		*	*	*	*	*	*	0	*
2012		*	*	*	*	*	*	0	*
2011		*	*	*	*	*	*	0	*
2010		*	*	*	*	*	*	0	*
2009		*	*	*	*	*	*	0	*
2008		*	*	*	*	*	*	0	*
2007		*	*	*	*	*	*	0	*
2006		*	*	*	*	*	*	0	*
2005		*	*	*	*	*	*	0	*
2004		*	*	*	*	*	*	0	*
2003		9	*	*	*	35	12.6	4	2
2002		8	37	*	53	61	16.4	27	2
2001		7.5	35	40.8	67	94	20.0	28	15
2000		7.5	36	*	75	250	43.0	29	15
1999		7.5	51	60.7	110	220	44.0	26	15
1998		16	43	45.9	58	70	13.1	29	15
1997		16	44	43.4	69	100	19.4	30	15
1996		7.5	32	*	61	90	21.9	23	15
1995		7.5	7.5	25.2	49	110	24.1	29	15
1994		7.5	7.5	*	34	42	12.3	14	15
1993		*	*	*	*	*	*	0	*
1992		1	9	*	55	110	31.2	20	2
1991		1	1	12.5	39	90	20.6	28	2
1990		1	17	*	96	130	41.3	16	2
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.