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

Year	Months Present	Minimum	Median	Mean	90th Percentile	Maximum	Standard Deviation	Number of Observations	Detection Limit
2023		0.65	0.65	*	1.4	2.0	0.37	21	1.3
2022		0.65	0.65	0.84	1.4	2.2	0.40	30	1.3
2021		0.65	0.65	*	1.8	2.4	0.56	24	1.3
2020		0.65	*	*	*	0.65	0.00	9	1.3
2019		0.65	0.65	1.06	2.0	2.8	0.68	34	1.3
2018		0.65	0.65	1.18	2.1	2.9	0.68	37	1.3
2017		0.65	1.5	1.70	3.2	4.3	1.07	33	1.3
2016		0.65	0.65	*	0.65	1.4	0.13	33	1.3
2015		0.65	0.65	0.65	0.65	0.65	0.00	33	1.3
2014		0.8	0.8	*	2.3	4.2	0.95	16	1.6
2013		0.75	0.75	*	1.5	1.9	0.33	21	1.5
2012		0.75	0.75	1.06	1.7	4.0	0.76	32	1.5
2011		0.75	0.75	*	0.75	1.8	0.19	29	1.5
2010		0.75	0.75	0.75	0.75	0.75	0.00	29	1.5
2009		0.75	0.75	0.75	0.75	0.75	0.00	29	1.5
2008		*	*	*	*	*	*	0	*
2007		0.75	0.75	0.75	0.75	0.75	0.00	31	1.5
2006		*	*	*	*	*	*	0	*
2005		*	*	*	*	*	*	0	*
2004		*	*	*	*	*	*	0	*
2003		7.5	*	*	*	7.5	0.00	5	15
2002		7.5	7.5	7.75	7.5	7.5	0.25	36	15
2001		8	8	8.00	8	8	0.00	39	16
2000		8	8	8.00	8	8	0.00	40	16
1999		8	8	8.00	8	8	0.00	39	16
1998		8	8	8.00	8	8	0.00	42	16
1997		8	8	8.00	8	8	0.00	34	16
1996		8	8	8.00	8	8	0.00	36	16
1995		8	8	8.00	8	8	0.00	30	16
1994		8	8	*	8	8	0.00	25	16
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.