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	Annual Toxics Summary Simi Valley-Cochran Street FAQs Strontium nanograms per cubic meter

Year	Months Present	Minimum	Median	Mean	90th Percentile	Maximum	Standard Deviation	Number of Observations	Detection Limit
2025		0.65	3.7	*	5.9	7.9	2.12	15	1.3
2024		0.7	4.0	4.75	6.3	33.3	5.72	30	0.3
2023		0.65	4.0	4.84	7.0	12.6	2.67	29	1.3
2022		0.65	4.6	5.93	9.4	35.5	6.08	31	1.3
2021		1.7	5.6	*	8.9	10.5	2.25	22	1.3
2020		0.65	*	*	*	11.9	4.34	8	1.3
2019		0.65	3.8	4.28	7.1	12.2	2.50	29	1.3
2018		0.65	5.1	5.33	8.6	12	2.74	34	1.3
2017		0.65	6.1	6.93	12	28.3	5.71	29	1.3
2016		0.65	6.8	*	9.3	19.2	3.80	28	1.3
2015		0.65	5.2	5.47	7.3	32.8	5.56	30	1.3
2014		0.6	6.3	5.80	9.0	12	3.07	30	1.2
2013		0.75	5.9	*	9.9	14	3.29	26	1.5
2012		0.75	4.4	5.08	8.3	15	3.06	28	1.5
2011		0.75	3.9	*	10.2	18	4.10	24	1.5
2010		0.75	4.1	4.44	7.5	10	2.53	28	1.5
2009		0.75	5.3	5.96	11	13	3.38	31	1.5
2008		*	*	*	*	*	*	0	*
2007		0.75	6.2	*	12	22	4.71	24	1.5
2006		*	*	*	*	*	*	0	*
2005		*	*	*	*	*	*	0	*
2004		*	*	*	*	*	*	0	*
2003		4.0	*	*	*	19	7.14	4	1.0
2002		4.0	9.0	10.5	16.4	23	4.85	29	1.0
2001		1	9.0	*	16.4	170	33.6	24	2.0
2000		1	8.0	*	9.6	10	2.94	15	2.0
1999		1	10	*	16	39	7.26	27	2.0
1998		1	7.0	6.94	12	15	3.41	29	2.0
1997		1	7.0	7.57	12	20	4.30	31	2.0
1996		1	9.0	7.60	11.6	17	4.45	29	2.0
1995		1	7.0	8.76	18	31	7.18	31	2.0
1994		1	6.0	*	13.4	39	7.47	27	2.0
1993		1	8.0	9.00	19	22	6.27	31	2.0
1992		1	7.0	*	19.6	25	6.69	22	2.0
1991		1	10	10.2	16.6	19	4.63	28	2.0
1990		4.0	14	*	27	46	10.8	16	2.0
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.