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	Annual Toxics Summary Stockton-Hazelton Street FAQs Titanium nanograms per cubic meter

Year	Months Present	Minimum	Median	Mean	90th Percentile	Maximum	Standard Deviation	Number of Observations	Detection Limit
2023		*	*	*	*	*	*	0	*
2022		*	*	*	*	*	*	0	*
2021		10	48	*	89	120	30.2	15	2.69
2020		4	*	*	*	98	30.2	7	2.69
2019		5	30	43.0	95	183	45.3	30	2.69
2018		4	37	44.5	84	161	35.5	32	2.69
2017		7	37	48.2	86	211	39.7	32	2.69
2016		1.345	37	39.8	59	165	29.8	32	2.69
2015		9	46	50.4	70	142	28.1	31	2.69
2014		0.95	30	34.7	61	120	26.2	31	1.9
2013		5	28	*	67	100	22.8	30	1.5
2012		4.5	17	15.2	29	35	10.8	29	9
2011		4.5	4.5	*	24	43	10.1	29	9
2010		4.5	9	11.3	24	45	9.4	29	9
2009		4.5	4.5	10.9	18	25	6.7	32	9
2008		21	100	119	250	390	92.6	33	1
2007		4.5	23	25.9	57	110	24.6	37	9
2006		*	*	*	*	*	*	0	*
2005		*	*	*	*	*	*	0	*
2004		*	*	*	*	*	*	0	*
2003		17	*	*	*	86	26.4	5	3
2002		5	110	99.6	170	280	58.1	35	3
2001		16	72	93.5	160	340	68.9	35	10
2000		10	80	87.3	130	400	69.4	33	10
1999		14	90	103	150	630	107	31	10
1998		11	67	92.6	160	430	82.8	31	10
1997		5	120	121	200	390	78.7	29	10
1996		13	98	94.8	180	210	56.8	32	10
1995		21	73	*	200	370	93.2	27	10
1994		12	130	118	180	310	67.8	34	10
1993		17	110	135	250	490	99.5	31	10
1992		20	120	129	210	350	75.5	30	10
1991		39	180	185	310	530	111	31	10
1990		43	170	*	390	510	132	17	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.