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	Annual Toxics Summary Riverside-Rubidoux FAQs Acrolein parts per billion

Year	Months Present	Minimum	Median	Mean	90th Percentile	Maximum	Standard Deviation	Number of Observations	Detection Limit
2023		0.15	0.15	*	0.6	0.7	0.20	13	0.3
2022		*	*	*	*	*	*	0	*
2021		*	*	*	*	*	*	0	*
2020		0.15	*	*	*	0.7	0.22	5	0.3
2019		0.15	0.4	*	1.1	1.6	0.38	25	0.3
2018		*	*	*	*	*	*	0	*
2017		0.15	0.4	*	0.5	0.6	0.16	20	0.3
2016		0.15	0.8	*	1.2	1.3	0.35	26	0.3
2015		0.15	0.6	*	0.9	1.0	0.26	25	0.3
2014		0.15	0.6	0.71	0.8	3.5	0.59	27	0.3
2013		0.15	0.6	*	1.5	3.7	0.79	27	0.3
2012		0.15	0.5	0.68	1.1	2.1	0.39	30	0.3
2011		0.15	0.7	1.50	3.0	16	2.89	31	0.3
2010		0.3	0.7	0.68	0.9	1.1	0.19	27	0.3
2009		0.15	0.6	*	1.0	1.3	0.25	27	0.3
2008		0.15	0.6	0.61	0.8	1.0	0.16	30	0.3
2007		0.15	0.5	0.47	0.8	0.9	0.22	29	0.3
2006		0.15	0.4	*	0.7	0.9	0.20	19	0.3
2005		0.15	0.5	0.80	0.8	7.4	1.36	28	0.3
2004		0.15	0.5	*	0.7	0.8	0.17	25	0.3
2003		0.4	0.5	*	0.8	0.9	0.21	11	0.3
2002		*	*	*	*	*	*	0	*
2001		*	*	*	*	*	*	0	*
2000		*	*	*	*	*	*	0	*
1999		*	*	*	*	*	*	0	*
1998		*	*	*	*	*	*	0	*
1997		*	*	*	*	*	*	0	*
1996		*	*	*	*	*	*	0	*
1995		*	*	*	*	*	*	0	*
1994		*	*	*	*	*	*	0	*
1993		*	*	*	*	*	*	0	*
1992		*	*	*	*	*	*	0	*
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.