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	Annual Toxics Summary Chico-Manzanita Avenue FAQs Titanium 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		4.5	4.5	*	19	20	6.6	12	9
2011		4.5	4.5	*	28	72	15.8	29	9
2010		4.5	4.5	11.6	26	29	8.9	30	9
2009		4.5	4.5	10.6	21	30	7.8	30	9
2008		7	66	92.4	210	230	69.4	31	1
2007		4.5	16	16.7	32	50	12.2	30	9
2006		*	*	*	*	*	*	0	*
2005		*	*	*	*	*	*	0	*
2004		*	*	*	*	*	*	0	*
2003		18	*	*	*	49	12.9	5	3
2002		7	87	102	170	200	57.6	31	3
2001		5	55	88.0	210	280	80.5	32	10
2000		5	58	77.4	190	200	62.3	31	10
1999		5	68	103	220	380	91.4	30	10
1998		5	37	70.2	190	290	71.8	32	10
1997		5	60	75.9	150	310	63.3	30	10
1996		5	65	86.4	190	270	76.8	29	10
1995		5	84	87.9	170	200	66.1	29	10
1994		5	81	98.4	220	310	81.5	30	10
1993		5	90	87.3	210	380	88.5	29	10
1992		5	79	*	300	350	116	16	10
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.