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	Annual Toxics Summary Simi Valley-Cochran Street FAQs Barium 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		21	*	*	*	42	9.1	4	19
2002		9.5	38	37.8	61	130	25.1	29	19
2001		12.5	31	*	60	890	176	24	25
2000		12.5	12.5	*	41	54	14.6	15	25
1999		12.5	34	*	72	170	33.3	27	25
1998		12.5	12.5	21.3	41	45	12.1	29	25
1997		12.5	12.5	23.0	43	69	15.2	31	25
1996		12.5	26	24.8	43	56	13.6	29	25
1995		12.5	12.5	25.1	52	65	16.9	31	25
1994		12.5	12.5	*	39	280	51.1	27	25
1993		12.5	12.5	35.1	55	280	48.7	31	25
1992		12.5	12.5	*	60	99	24.5	22	25
1991		12.5	12.5	19.1	45	69	15.9	28	25
1990		12.5	12.5	*	63	160	38.6	16	25
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.