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	Annual Toxics Summary Riverside-Rubidoux FAQs Calcium 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		*	*	*	*	*	*	0	*
2011		*	*	*	*	*	*	0	*
2010		*	*	*	*	*	*	0	*
2009		*	*	*	*	*	*	0	*
2008		*	*	*	*	*	*	0	*
2007		*	*	*	*	*	*	0	*
2006		*	*	*	*	*	*	0	*
2005		*	*	*	*	*	*	0	*
2004		*	*	*	*	*	*	0	*
2003		370	*	*	*	4300	1930	5	4
2002		680	5600	6580	12000	16000	4010	31	4
2001		210	4500	5480	11000	13000	3710	30	3
2000		290	4500	4470	8100	11000	2850	29	3
1999		430	3700	3810	8900	11000	2900	28	3
1998		1300	4000	*	5500	5600	1290	12	3
1997		2000	*	*	*	2000	2700	1	3
1996		540	3800	4300	8100	10000	2700	27	3
1995		200	4300	5730	12000	20000	4720	30	3
1994		540	5500	5890	10000	14000	3810	30	3
1993		120	3600	4400	8400	14000	3320	28	3
1992		220	4000	4430	9400	14000	3450	30	3
1991		58	4100	4790	10000	13000	3400	30	3
1990		1400	3900	*	8200	9400	2440	15	3
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.