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

Year	Months Present	Minimum	Median	Mean	90th Percentile	Maximum	Standard Deviation	Number of Observations	Detection Limit
2024		1	12	*	30	32	10.0	13	0.59
2023		3	20	22.8	36	54	12.7	29	2.69
2022		1.345	23	25.7	45	62	13.6	31	2.69
2021		5	28	*	54	59	15.8	22	2.69
2020		3	*	*	*	48	16.5	8	2.69
2019		1.345	20	23.5	50	75	17.5	29	2.69
2018		1.345	28	30.5	56	74	17.4	34	2.69
2017		3	29	34.0	58	72	18.6	29	2.69
2016		5	38	*	53	66	17.6	28	2.69
2015		5	27	25.6	37	43	10.4	30	2.69
2014		4	28	28.8	44	60	13.8	30	1.9
2013		5	28	*	43	54	13.8	26	1.5
2012		4.5	14	15.8	29	32	9.5	28	9
2011		4.5	10	*	31	42	11.6	28	9
2010		4.5	13	13.6	26	34	8.8	28	9
2009		4.5	14	17.1	34	39	11.3	31	9
2008		6	93	105	190	270	70.8	29	1
2007		4.5	24	*	41	56	13.6	27	9
2006		*	*	*	*	*	*	0	*
2005		*	*	*	*	*	*	0	*
2004		*	*	*	*	*	*	0	*
2003		15	*	*	*	90	34.3	4	3
2002		26	110	103	160	270	57.0	29	3
2001		5	97	*	170	220	57.8	24	10
2000		5	68	*	110	110	32.4	15	10
1999		13	100	*	160	210	55.0	27	10
1998		5	63	63.9	130	190	45.5	29	10
1997		12	74	77.2	140	210	43.1	31	10
1996		12	91	82.8	150	180	51.1	29	10
1995		5	81	97.8	190	240	68.1	31	10
1994		13	81	*	160	330	69.8	27	10
1993		5	73	202	190	4200	742	31	10
1992		11	91	*	160	280	64.8	22	10
1991		14	120	122	190	250	61.5	28	10
1990		21	150	*	320	390	108	16	10
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.