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

Year	Months Present	Minimum	Median	Mean	90th Percentile	Maximum	Standard Deviation	Number of Observations	Detection Limit
2023		2.5	31.7	*	56.4	64.3	18.6	21	1.3
2022		6.5	40.3	40.2	68.4	110	25.3	30	1.3
2021		2.4	47.8	*	100	130	32.1	24	1.3
2020		12	*	*	*	55.4	16.8	9	1.3
2019		6.0	34.7	40.2	82.5	110	27.2	34	1.3
2018		3.2	38.8	40.5	80.4	97.5	27.0	37	1.3
2017		4.9	34.2	37.1	70.1	81.9	21.4	33	1.3
2016		6.5	45.5	*	74.7	93.6	24.6	33	1.3
2015		0.65	34.3	36.7	59.8	161	29.1	33	1.3
2014		1.8	46.5	*	92.5	190	44.5	16	1.7
2013		12	39	*	57	89	19.8	21	1.0
2012		10	33.5	34.7	62.3	87	20.4	32	1.5
2011		1.9	25.5	27.9	54.7	81	21.0	32	1.5
2010		2.5	16	*	29.5	70	14.1	26	1.5
2009		4.0	21	22.9	36	49	10.7	29	1.5
2008		10	44	48.3	100	120	29.1	31	1.0
2007		3.2	27.5	30.1	49.6	110	20.5	32	1.5
2006		*	*	*	*	*	*	0	*
2005		*	*	*	*	*	*	0	*
2004		*	*	*	*	*	*	0	*
2003		13	*	*	*	24	4.85	5	1.0
2002		6.0	38	44.5	73.5	100	24.4	36	1.0
2001		4.0	27	33.3	64.2	83	21.4	39	2.0
2000		2.0	34.5	36.3	56	85	19.0	40	2.0
1999		2.0	31	37.6	79.2	120	27.7	39	2.0
1998		4.0	25	32.1	69.6	91	24.2	42	2.0
1997		6.0	37	36.7	59	82	19.9	34	2.0
1996		4.0	33	32.6	71.5	110	26.0	36	2.0
1995		4.0	41.5	44.8	89.3	98	29.1	30	2.0
1994		7.0	42	*	71.4	79	20.9	25	2.0
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.