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	Annual Toxics Summary Riverside-Rubidoux FAQs Phosphorus 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		1	*	*	*	76	30.0	5	2
2002		21	230	278	540	580	176	31	2
2001		7.5	240	260	540	570	187	30	15
2000		24	220	243	510	590	173	29	15
1999		18	250	231	420	490	148	28	15
1998		100	230	*	430	470	134	12	15
1997		49	*	*	*	49	128	1	15
1996		23	210	188	350	410	128	27	15
1995		7.5	95	133	260	390	115	30	15
1994		59	200	*	280	300	78.8	15	15
1993		*	*	*	*	*	*	0	*
1992		1	110	*	280	330	111	20	2
1991		8	79	104	210	280	78.8	30	2
1990		32	160	*	260	290	85.5	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.