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

Year	Months Present	Minimum	Median	Mean	90th Percentile	Maximum	Standard Deviation	Number of Observations	Detection Limit
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		*	*	*	*	*	*	0	*
2011		*	*	*	*	*	*	0	*
2010		*	*	*	*	*	*	0	*
2009		*	*	*	*	*	*	0	*
2008		*	*	*	*	*	*	0	*
2007		*	*	*	*	*	*	0	*
2006		*	*	*	*	*	*	0	*
2005		*	*	*	*	*	*	0	*
2004		*	*	*	*	*	*	0	*
2003		270	*	*	*	3800	1410	5	4
2002		620	3400	3410	4900	6000	1510	31	4
2001		43	3200	3000	5200	6400	1660	30	5
2000		330	2500	3040	4800	5900	1540	29	5
1999		450	3100	2960	4800	5900	1510	28	5
1998		1000	3100	*	4200	4500	1070	12	5
1997		520	*	*	*	520	1330	1	5
1996		110	2600	2350	3900	4400	1330	27	5
1995		130	2400	2750	5100	5900	1670	30	5
1994		280	3100	3230	5100	6000	1540	30	5
1993		72	3200	3350	6000	7000	2150	28	5
1992		210	3800	3460	6100	6800	2040	30	5
1991		66	3500	3990	7000	9600	2540	30	5
1990		1500	4100	*	8600	10000	2510	15	5
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.