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

Year	Months Present	Minimum	Median	Mean	90th Percentile	Maximum	Standard Deviation	Number of Observations	Detection Limit
2025		0.65	3	*	7	9	2.4	16	1.3
2024		1	4	*	12	17	4.7	27	0.19
2023		0.65	3	*	7	11	2.6	25	1.3
2022		0.65	4	*	8	23	5.2	27	1.3
2021		0.65	3	*	18	23	7.2	21	1.3
2020		2	*	*	*	16	4.8	6	1.3
2019		0.65	4	4.9	8	24	4.3	29	1.3
2018		0.65	5	5.1	9	14	3.3	30	1.3
2017		0.65	3	4.4	8	16	3.1	29	1.3
2016		0.65	4	4.7	9	14	3.1	28	1.3
2015		0.65	4	*	7	16	3.3	28	1.3
2014		0.85	5	4.8	7	15	3.3	29	1.7
2013		2	4	*	9	17	3.6	29	1.5
2012		1.5	1.5	*	6	7	1.7	27	3
2011		1.5	1.5	2.1	5	8	1.6	29	3
2010		1.5	1.5	2.6	4	6	1.4	30	3
2009		1.5	1.5	2.7	5	7	1.6	31	3
2008		*	*	*	*	*	*	0	*
2007		1.5	4	*	7	8	2.6	11	3
2006		*	*	*	*	*	*	0	*
2005		*	*	*	*	*	*	0	*
2004		*	*	*	*	*	*	0	*
2003		3	*	*	*	3	0.0	5	6
2002		2.5	2.5	3.2	5	7	1.3	31	5
2001		2.5	2.5	2.9	2.5	8	1.4	30	5
2000		2.5	2.5	2.5	2.5	2.5	0.0	29	5
1999		2.5	2.5	3.6	8	11	2.4	28	5
1998		2.5	2.5	*	2.5	6	1.2	12	5
1997		2.5	*	*	*	2.5	0.0	1	5
1996		2.5	2.5	2.5	2.5	2.5	0.0	27	5
1995		2.5	2.5	2.9	2.5	8	1.3	30	5
1994		2.5	2.5	12.4	7	320	57.8	30	5
1993		2.5	2.5	4.2	7	10	2.2	28	5
1992		2.5	*	*	*	8	2.0	10	5
1991		*	*	*	*	*	*	0	*
1990		*	*	*	*	*	*	0	*
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.