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	Annual Toxics Summary Simi Valley-Cochran Street FAQs Antimony 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	*	0.65	2	0.4	19	1.3
2022		0.65	0.65	1.1	2	4	0.7	31	1.3
2021		0.65	0.65	*	3	3	1.0	22	1.3
2020		0.65	*	*	*	4	1.3	8	1.3
2019		0.65	2	2.1	4	5	1.2	29	1.3
2018		0.65	2	2.2	4	5	1.3	34	1.3
2017		0.65	2	1.8	5	6	1.5	29	1.3
2016		0.65	2	*	5	7	1.7	28	1.3
2015		0.65	0.65	1.3	3	4	1.0	30	1.3
2014		0.85	2	2.5	5	7	1.9	30	1.7
2013		2	2	*	3	5	1.0	26	1.5
2012		1.5	1.5	1.7	1.5	5	0.7	28	3
2011		1.5	1.5	1.7	1.5	4	0.4	30	3
2010		1.5	1.5	1.6	1.5	3	0.4	28	3
2009		1.5	1.5	1.6	1.5	4	0.5	31	3
2008		*	*	*	*	*	*	0	*
2007		1.5	1.5	*	4	5	1.2	19	3
2006		*	*	*	*	*	*	0	*
2005		*	*	*	*	*	*	0	*
2004		*	*	*	*	*	*	0	*
2003		3	*	*	*	3	0.0	4	6
2002		2.5	2.5	3.3	2.5	7	1.2	29	5
2001		2.5	2.5	*	6	40	7.7	24	5
2000		2.5	2.5	*	2.5	10	1.9	15	5
1999		2.5	2.5	*	2.5	6	0.8	27	5
1998		2.5	2.5	2.8	2.5	7	1.1	29	5
1997		2.5	2.5	2.5	2.5	2.5	0.0	31	5
1996		2.5	2.5	2.5	2.5	2.5	0.0	29	5
1995		2.5	2.5	2.6	2.5	5	0.4	31	5
1994		2.5	2.5	*	2.5	13	2.0	27	5
1993		2.5	2.5	2.5	2.5	2.5	0.0	31	5
1992		2.5	*	*	*	2.5	0.0	10	5
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.