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	Annual Toxics Summary Simi Valley-Cochran Street FAQs Aluminum 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		190	*	*	*	2100	874	4	4
2002		530	1600	1540	2400	3500	782	29	4
2001		100	1400	*	2800	3500	936	24	5
2000		84	1000	*	1700	2000	558	15	5
1999		230	1500	*	2400	3300	876	27	5
1998		34	980	999	1700	3900	774	29	5
1997		150	1000	1170	2000	3200	694	31	5
1996		34	1400	1220	2100	2600	758	29	5
1995		75	1100	1500	3100	3500	1050	31	5
1994		190	1300	*	2300	2500	756	27	5
1993		35	1200	1380	2800	3400	955	31	5
1992		220	1600	*	2500	4200	961	22	5
1991		140	1800	1820	3100	3900	938	28	5
1990		590	2800	*	5200	8400	2080	16	5
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.