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	Annual Toxics Summary Bakersfield-5558 California Avenue FAQs Chromium nanograms per cubic meter

Year	Months Present	Minimum	Median	Mean	90th Percentile	Maximum	Standard Deviation	Number of Observations	Detection Limit
2023		4.255	4.255	*	10	11	2.4	21	8.51
2022		4.255	4.255	8.2	11	38	6.5	30	8.51
2021		4.255	4.255	*	13	13	3.6	24	8.51
2020		4.255	*	*	*	14	3.3	9	8.51
2019		4.255	9	*	12	14	3.4	31	8.51
2018		4.255	9	7.9	12	13	3.4	37	8.51
2017		4.255	4.255	6.3	12	14	3.4	33	8.51
2016		4.255	4.255	*	11	12	2.9	33	8.51
2015		4.255	4.255	5.1	4.255	18	2.7	33	8.51
2014		3.4	3.4	*	16	25	6.6	16	6.8
2013		4	4	*	6	10	1.4	21	3
2012		1.5	5	4.7	6	10	2.0	32	3
2011		1.5	3	*	7	9	2.1	27	3
2010		1.5	3	3.1	5	8	1.7	29	3
2009		1.5	4	3.5	6	7	1.6	29	3
2008		*	*	*	*	*	*	0	*
2007		1.5	5	4.3	6	8	1.5	32	3
2006		*	*	*	*	*	*	0	*
2005		*	*	*	*	*	*	0	*
2004		*	*	*	*	*	*	0	*
2003		3	*	*	*	8	2.2	5	2
2002		1	5	5.3	9	12	3.2	36	2
2001		1	3	3.3	6	8	2.1	39	2
2000		1	4	3.8	6	11	2.3	40	2
1999		1	4	4.6	9	12	3.2	39	2
1998		1	5	4.1	8	10	2.8	42	2
1997		1	4	4.6	7	10	2.3	34	2
1996		1	4	4.0	8	12	2.7	36	2
1995		1	5	4.9	10	10	3.2	30	2
1994		1	5	*	10	11	2.9	25	2
1993		*	*	*	*	*	*	0	*
1992		*	*	*	*	*	*	0	*
1991		*	*	*	*	*	*	0	*
1990		*	*	*	*	*	*	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.