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	Annual Toxics Summary Burbank-W Palm Avenue FAQs Chromium 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		3.4	3.4	*	3.4	3.4	0.0	12	6.8
2013		4	4	*	8	11	1.9	26	3
2012		1.5	5	4.9	7	9	1.8	29	3
2011		1.5	6	*	7	8	1.9	18	3
2010		1.5	4	3.8	6	8	1.6	29	3
2009		1.5	4	3.9	6	7	1.8	30	3
2008		*	*	*	*	*	*	0	*
2007		3	5	5.2	7	17	2.6	28	3
2006		*	*	*	*	*	*	0	*
2005		*	*	*	*	*	*	0	*
2004		*	*	*	*	*	*	0	*
2003		3	*	*	*	6	1.3	5	2
2002		1	5	6.0	11	14	3.3	30	2
2001		1	5	*	11	17	3.7	28	2
2000		1	5	5.6	9	17	3.2	31	2
1999		1	6	*	10	18	3.6	25	2
1998		1	6	6.2	10	14	2.9	29	2
1997		2	6	*	12	20	4.1	29	2
1996		2	6	*	10	21	4.1	23	2
1995		1	6	9.3	14	55	9.7	31	2
1994		1	7	*	13	23	4.9	27	2
1993		1	7	8.1	14	15	3.8	31	2
1992		2	7	9.6	17	47	9.1	31	2
1991		1	9	9.7	15	45	8.1	28	2
1990		2	7	9.7	20	37	7.8	30	1
1989		2	7	*	12	38	7.3	34	1

	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.