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	Annual Toxics Summary Riverside-Rubidoux FAQs Titanium nanograms per cubic meter

Year	Months Present	Minimum	Median	Mean	90th Percentile	Maximum	Standard Deviation	Number of Observations	Detection Limit
2023		7	73	*	110	155	36.7	17	2.69
2022		9	78	*	160	250	51.8	27	2.69
2021		8	110	*	150	214	51.9	21	2.69
2020		42	*	*	*	121	33.9	6	2.69
2019		1.345	79	89.7	190	274	72.3	29	2.69
2018		1.345	94	103	180	228	61.1	30	2.69
2017		13	88	100	160	216	50.2	29	2.69
2016		18	110	123	190	323	65.5	28	2.69
2015		10	75	*	150	222	50.7	28	2.69
2014		13	100	97.2	150	150	40.6	29	1.9
2013		5	87	*	130	250	52.3	29	1.5
2012		4.5	43	53.5	100	120	37.1	29	9
2011		4.5	26	*	82	90	28.7	29	9
2010		4.5	43	43.0	73	120	26.4	30	9
2009		4.5	50	51.9	87	100	26.6	31	9
2008		22	210	214	330	500	111	30	1
2007		15	75	*	140	170	44.9	23	9
2006		*	*	*	*	*	*	0	*
2005		*	*	*	*	*	*	0	*
2004		*	*	*	*	*	*	0	*
2003		28	*	*	*	230	82.8	5	3
2002		50	230	263	420	490	128	31	3
2001		5	230	234	430	540	144	30	10
2000		24	190	216	360	440	117	29	10
1999		26	240	217	370	510	124	28	10
1998		78	210	*	340	350	90.5	12	10
1997		38	*	*	*	38	111	1	10
1996		5	230	191	320	370	111	27	10
1995		11	200	221	420	470	141	30	10
1994		23	210	236	380	490	118	30	10
1993		5	250	252	480	590	174	28	10
1992		14	260	246	430	510	155	30	10
1991		5	230	283	510	810	200	30	10
1990		73	270	*	480	810	181	15	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.