California Home	ARB:	Home	Search	Site Map				Contact Us

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

Year	Months Present	Minimum	Median	Mean	90th Percentile	Maximum	Standard Deviation	Number of Observations	Detection Limit
2025		*	*	*	*	*	*	0	*
2024		*	*	*	*	*	*	0	*
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		2600	*	*	*	5200	1050	5	2
2002		1000	8800	9010	15000	18000	4720	36	2
2001		980	5600	7070	13000	17000	4500	39	3
2000		550	7300	7740	12000	19000	4020	40	3
1999		130	7400	8060	15000	21000	5310	39	3
1998		860	5600	6880	15000	18000	5120	42	3
1997		1500	8300	8570	13000	18000	4720	34	3
1996		650	7000	6780	15000	21000	5340	36	3
1995		880	8400	9280	18000	20000	5590	30	3
1994		1500	9800	*	15000	17000	4570	25	3
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.