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	Annual Toxics Summary Riverside-Rubidoux FAQs Rubidium 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		*	*	*	*	*	*	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		0.5	*	*	*	6	2.3	5	1
2002		1	8	7.7	12	14	3.7	31	1
2001		1	7	6.7	11	16	4.1	30	2
2000		1	5	6.0	9	13	3.3	29	2
1999		1	7	6.1	11	13	3.5	28	2
1998		2	6	*	10	10	2.7	12	2
1997		1	*	*	*	1	3.1	1	2
1996		1	6	4.9	8	11	3.1	27	2
1995		1	4	4.9	10	12	3.6	30	2
1994		1	6	6.6	11	13	3.5	30	2
1993		1	6	6.6	13	17	4.6	28	2
1992		1	6	6.3	11	14	4.2	30	2
1991		1	6	7.0	14	18	4.9	30	2
1990		2	6	*	12	21	4.5	15	2
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.